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高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)耐(nai)(nai)磨(mo)(mo)(mo)(mo)板(ban)(ban)(ban)(ban)(ban)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)出(chu)現(xian)(xian)(xian)裂(lie)(lie)(lie)(lie)(lie)痕現(xian)(xian)(xian)象(xiang)(xiang)處理方式：異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)內(nei)(nei)部(bu)(bu)有(you)(you)(you)(you)較多平(ping)行板(ban)(ban)(ban)(ban)(ban)面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)，微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)呈(cheng)壓扁(bian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)半網絡狀(zhuang)特征(zheng)(zheng)，微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)有(you)(you)(you)(you)明顯(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)高(gao)(gao)(gao)(gao)(gao)(gao)溫(wen)(wen)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。經能(neng)(neng)(neng)譜(pu)剖(pou)(pou)析(xi)，微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)主(zhu)要(yao)含(han)Fe、O元素，對(dui)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)金(jin)相(xiang)試樣(yang)進一(yi)步用(yong)3%的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)硝酸酒(jiu)精溶液腐蝕，并制(zhi)(zhi)造(zao)(zao)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)縱截面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)金(jin)相(xiang)試樣(yang)，運用(yong)金(jin)相(xiang)顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)察(cha)(cha)看組(zu)(zu)織(zhi)(zhi)(zhi)，可見(jian)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)與(yu)(yu)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)組(zu)(zu)織(zhi)(zhi)(zhi)分(fen)(fen)(fen)歧(qi)，均(jun)為鐵(tie)素體(ti)+珠光體(ti)+貝氏體(ti)，但(dan)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)存(cun)在(zai)(zai)(zai)細微(wei)(wei)(wei)(wei)(wei)(wei)脫(tuo)碳(tan)(tan)(tan)(tan)現(xian)(xian)(xian)象(xiang)(xiang)。脫(tuo)碳(tan)(tan)(tan)(tan)和(he)(he)(he)(he)(he)構(gou)成(cheng)(cheng)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)(wu)(wu)要(yao)滿(man)足2個條(tiao)件(jian)(jian):脫(tuo)碳(tan)(tan)(tan)(tan)要(yao)有(you)(you)(you)(you)較高(gao)(gao)(gao)(gao)(gao)(gao)溫(wen)(wen)度(du)(du)(700～800℃以(yi)(yi)(yi)上)，要(yao)有(you)(you)(you)(you)足夠(gou)時(shi)間。碳(tan)(tan)(tan)(tan)原子由(you)內(nei)(nei)向(xiang)外(wai)(wai)(wai)(wai)(wai)發(fa)作(zuo)(zuo)擴散(san)，與(yu)(yu)空氣(qi)中(zhong)(zhong)(zhong)(zhong)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)構(gou)成(cheng)(cheng)CO或CO2氣(qi)體(ti)跑掉(diao)，高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)耐(nai)(nai)磨(mo)(mo)(mo)(mo)板(ban)(ban)(ban)(ban)(ban)招致裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)四(si)周脫(tuo)碳(tan)(tan)(tan)(tan)。內(nei)(nei)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)機(ji)理是(shi)進入鋼(gang)(gang)(gang)(gang)(gang)中(zhong)(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)與(yu)(yu)強(qiang)(qiang)(qiang)(qiang)(qiang)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)性(xing)(xing)(xing)(xing)(xing)元素硅(gui)錳(meng)分(fen)(fen)(fen)離構(gou)成(cheng)(cheng)富(fu)集(ji)硅(gui)、錳(meng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)(wu)(wu)顆粒(li)。點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)(wu)(wu)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)構(gou)成(cheng)(cheng)即內(nei)(nei)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)發(fa)作(zuo)(zuo)，要(yao)滿(man)足更高(gao)(gao)(gao)(gao)(gao)(gao)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)溫(wen)(wen)度(du)(du)和(he)(he)(he)(he)(he)更長時(shi)間的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)條(tiao)件(jian)(jian)，溫(wen)(wen)度(du)(du)要(yao)到達950～1 200℃，時(shi)間至(zhi)少0.5 h以(yi)(yi)(yi)上。假如時(shi)間較短(duan)，即便在(zai)(zai)(zai)高(gao)(gao)(gao)(gao)(gao)(gao)溫(wen)(wen)下(如粗軋(ya)和(he)(he)(he)(he)(he)精軋(ya)過(guo)(guo)(guo)程)，微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)中(zhong)(zhong)(zhong)(zhong)只(zhi)能(neng)(neng)(neng)產(chan)(chan)生細微(wei)(wei)(wei)(wei)(wei)(wei)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)，不(bu)(bu)(bu)(bu)會呈(cheng)現(xian)(xian)(xian)脫(tuo)碳(tan)(tan)(tan)(tan)及(ji)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。因而(er)(er)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)中(zhong)(zhong)(zhong)(zhong)存(cun)在(zai)(zai)(zai)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)脫(tuo)碳(tan)(tan)(tan)(tan)和(he)(he)(he)(he)(he)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)狀(zhuang)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)物(wu)(wu)(wu)是(shi)軋(ya)制(zhi)(zhi)前(qian)鑄(zhu)坯(pi)(pi)(pi)(pi)在(zai)(zai)(zai)加(jia)(jia)熱(re)和(he)(he)(he)(he)(he)保(bao)(bao)溫(wen)(wen)過(guo)(guo)(guo)程中(zhong)(zhong)(zhong)(zhong)形(xing)成(cheng)(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。還指出(chu)，硅(gui)含(han)量≥0.05%時(shi)，就(jiu)能(neng)(neng)(neng)夠(gou)產(chan)(chan)生內(nei)(nei)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)，當(dang)含(han)量到達0.25%時(shi)內(nei)(nei)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)就(jiu)非(fei)常(chang)(chang)(chang)(chang)激烈。依據(ju)(ju)剖(pou)(pou)析(xi)結果(guo)，鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)中(zhong)(zhong)(zhong)(zhong)硅(gui)含(han)量達0.38%，為內(nei)(nei)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)發(fa)作(zuo)(zuo)提(ti)供了(le)(le)有(you)(you)(you)(you)利條(tiao)件(jian)(jian)。氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)(he)(he)(he)(he)脫(tuo)碳(tan)(tan)(tan)(tan)是(shi)在(zai)(zai)(zai)鋼(gang)(gang)(gang)(gang)(gang)坯(pi)(pi)(pi)(pi)加(jia)(jia)熱(re)過(guo)(guo)(guo)程中(zhong)(zhong)(zhong)(zhong)產(chan)(chan)生的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)，它(ta)們的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)存(cun)在(zai)(zai)(zai)是(shi)斷(duan)(duan)(duan)(duan)(duan)(duan)定鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)來(lai)(lai)源于(yu)(yu)(yu)鋼(gang)(gang)(gang)(gang)(gang)坯(pi)(pi)(pi)(pi)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)根據(ju)(ju)。增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)型(xing)(xing)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)不(bu)(bu)(bu)(bu)只(zhi)能(neng)(neng)(neng)進步梁(liang)端的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)抗彎承(cheng)(cheng)載(zai)力，使塑性(xing)(xing)(xing)(xing)(xing)鉸轉移到增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)板(ban)(ban)(ban)(ban)(ban)以(yi)(yi)(yi)外(wai)(wai)(wai)(wai)(wai)位置(zhi)，還能(neng)(neng)(neng)有(you)(you)(you)(you)效(xiao)保(bao)(bao)證梁(liang)端焊縫不(bu)(bu)(bu)(bu)發(fa)作(zuo)(zuo)脆性(xing)(xing)(xing)(xing)(xing)毀壞，進步節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)延性(xing)(xing)(xing)(xing)(xing)。本文對(dui)6個板(ban)(ban)(ban)(ban)(ban)式增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)型(xing)(xing)Q690高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)鋼(gang)(gang)(gang)(gang)(gang)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)停止了(le)(le)低(di)周重復加(jia)(jia)載(zai)實驗(yan)，提(ti)醒了(le)(le)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)毀壞機(ji)制(zhi)(zhi)和(he)(he)(he)(he)(he)耗能(neng)(neng)(neng)機(ji)理，討(tao)論不(bu)(bu)(bu)(bu)同增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)方式、鋼(gang)(gang)(gang)(gang)(gang)材(cai)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)等(deng)級(ji)(ji)和(he)(he)(he)(he)(he)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)域(yu)補強(qiang)(qiang)(qiang)(qiang)(qiang)措施等(deng)要(yao)素對(dui)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)影(ying)響，高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)耐(nai)(nai)磨(mo)(mo)(mo)(mo)板(ban)(ban)(ban)(ban)(ban)量化(hua)(hua)(hua)(hua)(hua)(hua)剖(pou)(pou)析(xi)了(le)(le)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)承(cheng)(cheng)載(zai)力、剛度(du)(du)、延性(xing)(xing)(xing)(xing)(xing)、耗能(neng)(neng)(neng)才能(neng)(neng)(neng)等(deng)抗震性(xing)(xing)(xing)(xing)(xing)能(neng)(neng)(neng)指標。結果(guo)標明：“蓋(gai)板(ban)(ban)(ban)(ban)(ban)增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)型(xing)(xing)”節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)由(you)于(yu)(yu)(yu)蓋(gai)板(ban)(ban)(ban)(ban)(ban)和(he)(he)(he)(he)(he)梁(liang)翼緣(yuan)(yuan)(yuan)(yuan)與(yu)(yu)柱面(mian)(mian)直接焊接，銜接剛度(du)(du)大(da)，對(dui)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)轉動約束力強(qiang)(qiang)(qiang)(qiang)(qiang)，節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)變形(xing)才能(neng)(neng)(neng)弱于(yu)(yu)(yu)“板(ban)(ban)(ban)(ban)(ban)式過(guo)(guo)(guo)渡(du)型(xing)(xing)”節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，采(cai)用(yong)銜接板(ban)(ban)(ban)(ban)(ban)過(guo)(guo)(guo)渡(du)型(xing)(xing)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)FPS-1、FPS-2、FPS-3的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)延性(xing)(xing)(xing)(xing)(xing)系(xi)數比對(dui)應(ying)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)蓋(gai)板(ban)(ban)(ban)(ban)(ban)增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)型(xing)(xing)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)分(fen)(fen)(fen)別(bie)進步了(le)(le)8.41%、0.65%和(he)(he)(he)(he)(he)15.9%。梁(liang)采(cai)用(yong)Q690鋼(gang)(gang)(gang)(gang)(gang)材(cai)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)試件(jian)(jian)FPS-2、CPS-2極(ji)(ji)限承(cheng)(cheng)載(zai)力比采(cai)用(yong)Q345鋼(gang)(gang)(gang)(gang)(gang)材(cai)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)FPS-1、CPS-1分(fen)(fen)(fen)別(bie)進步了(le)(le)37%和(he)(he)(he)(he)(he)24%，高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)耐(nai)(nai)磨(mo)(mo)(mo)(mo)板(ban)(ban)(ban)(ban)(ban)而(er)(er)延性(xing)(xing)(xing)(xing)(xing)系(xi)數降(jiang)低(di)了(le)(le)83.81%和(he)(he)(he)(he)(he)70.66%。節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)域(yu)增(zeng)(zeng)強(qiang)(qiang)(qiang)(qiang)(qiang)后(hou)，試件(jian)(jian)FPS-3、CPS-3的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)極(ji)(ji)限承(cheng)(cheng)載(zai)力分(fen)(fen)(fen)別(bie)比FPS-2、CPS-2進步了(le)(le)14.14%和(he)(he)(he)(he)(he)13.74%，而(er)(er)延性(xing)(xing)(xing)(xing)(xing)系(xi)數降(jiang)低(di)了(le)(le)14.09%和(he)(he)(he)(he)(he)31.42%，標明貼焊補強(qiang)(qiang)(qiang)(qiang)(qiang)板(ban)(ban)(ban)(ban)(ban)能(neng)(neng)(neng)夠(gou)進步節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)承(cheng)(cheng)載(zai)力但(dan)限制(zhi)(zhi)了(le)(le)節(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)轉動才能(neng)(neng)(neng)。為研討(tao)某(mou)高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)拉(la)(la)(la)伸(shen)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)緣(yuan)(yuan)(yuan)(yuan)由(you)，采(cai)用(yong)金(jin)相(xiang)顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)、掃描電鏡(jing)及(ji)能(neng)(neng)(neng)譜(pu)儀分(fen)(fen)(fen)別(bie)對(dui)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)形(xing)貌、顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)組(zu)(zu)織(zhi)(zhi)(zhi)和(he)(he)(he)(he)(he)夾(jia)雜物(wu)(wu)(wu)及(ji)連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)低(di)倍組(zu)(zu)織(zhi)(zhi)(zhi)等(deng)停止了(le)(le)察(cha)(cha)看。結果(guo)標明:斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)呈(cheng)現(xian)(xian)(xian)2種(zhong)完(wan)整(zheng)不(bu)(bu)(bu)(bu)同的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)形(xing)貌，上部(bu)(bu)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)有(you)(you)(you)(you)細微(wei)(wei)(wei)(wei)(wei)(wei)脫(tuo)碳(tan)(tan)(tan)(tan)、高(gao)(gao)(gao)(gao)(gao)(gao)溫(wen)(wen)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)和(he)(he)(he)(he)(he)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)等(deng)現(xian)(xian)(xian)象(xiang)(xiang)，而(er)(er)連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)低(di)倍正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)，闡明拉(la)(la)(la)伸(shen)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)構(gou)成(cheng)(cheng)緣(yuan)(yuan)(yuan)(yuan)由(you)與(yu)(yu)熱(re)軋(ya)之前(qian)坯(pi)(pi)(pi)(pi)料外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)就(jiu)存(cun)在(zai)(zai)(zai)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)缺陷(xian)(xian)相(xiang)關(guan)。某(mou)高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)鋼(gang)(gang)(gang)(gang)(gang)通(tong)常(chang)(chang)(chang)(chang)應(ying)用(yong)于(yu)(yu)(yu)船舶制(zhi)(zhi)造(zao)(zao)范(fan)疇，采(cai)用(yong)低(di)C-SiCr-Cu-Mo成(cheng)(cheng)分(fen)(fen)(fen)體(ti)系(xi)，Si含(han)量0.38%～0.42%，制(zhi)(zhi)造(zao)(zao)工藝為冶(ye)煉(lian)-連(lian)(lian)(lian)鑄(zhu)-連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)二(er)切(qie)-中(zhong)(zhong)(zhong)(zhong)厚(hou)板(ban)(ban)(ban)(ban)(ban)產(chan)(chan)線(xian)-正(zheng)(zheng)(zheng)(zheng)(zheng)火-回火，強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)級(ji)(ji)別(bie)440 MPa級(ji)(ji)，檢(jian)驗(yan)過(guo)(guo)(guo)程中(zhong)(zhong)(zhong)(zhong)發(fa)現(xian)(xian)(xian)一(yi)個拉(la)(la)(la)伸(shen)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)試樣(yang)，本工作(zuo)(zuo)分(fen)(fen)(fen)離消(xiao)費實踐，對(dui)其停止研討(tao)剖(pou)(pou)析(xi)，肯定構(gou)成(cheng)(cheng)緣(yuan)(yuan)(yuan)(yuan)由(you)，以(yi)(yi)(yi)為后(hou)期(qi)消(xiao)費提(ti)供參考根據(ju)(ju)。取異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)縱截面(mian)(mian)試樣(yang)制(zhi)(zhi)造(zao)(zao)金(jin)相(xiang)試樣(yang)，經打(da)磨(mo)(mo)(mo)(mo)拋光后(hou)，用(yong)金(jin)相(xiang)顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)察(cha)(cha)看，。可見(jian)，就(jiu)本次(ci)發(fa)現(xian)(xian)(xian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)密集(ji)散(san)布氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)數量及(ji)大(da)小來(lai)(lai)看，氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)應(ying)該在(zai)(zai)(zai)軋(ya)制(zhi)(zhi)前(qian)鑄(zhu)坯(pi)(pi)(pi)(pi)在(zai)(zai)(zai)加(jia)(jia)熱(re)爐中(zhong)(zhong)(zhong)(zhong)加(jia)(jia)熱(re)和(he)(he)(he)(he)(he)保(bao)(bao)溫(wen)(wen)過(guo)(guo)(guo)程中(zhong)(zhong)(zhong)(zhong)構(gou)成(cheng)(cheng)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)。緣(yuan)(yuan)(yuan)(yuan)由(you)應(ying)在(zai)(zai)(zai)于(yu)(yu)(yu)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)沒(mei)(mei)有(you)(you)(you)(you)貫串(chuan)(chuan)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)厚(hou)度(du)(du)截面(mian)(mian)，拉(la)(la)(la)伸(shen)時(shi)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)處產(chan)(chan)生應(ying)力集(ji)中(zhong)(zhong)(zhong)(zhong)，招致裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)擴展(zhan)，由(you)于(yu)(yu)(yu)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)存(cun)在(zai)(zai)(zai)著(zhu)一(yi)定水平(ping)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)帶狀(zhuang)偏析(xi)，高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)耐(nai)(nai)磨(mo)(mo)(mo)(mo)板(ban)(ban)(ban)(ban)(ban)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)擴展(zhan)至(zhi)帶狀(zhuang)偏析(xi)處，發(fa)作(zuo)(zuo)層狀(zhuang)撕裂(lie)(lie)(lie)(lie)(lie)，當(dang)擴展(zhan)至(zhi)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)末端時(shi)，由(you)于(yu)(yu)(yu)拉(la)(la)(la)伸(shen)時(shi)只(zhi)要(yao)軸向(xiang)應(ying)力，故裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)擴展(zhan)中(zhong)(zhong)(zhong)(zhong)止，而(er)(er)沒(mei)(mei)有(you)(you)(you)(you)沿垂直方向(xiang)擴展(zhan)，影(ying)響正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)區域(yu)，這是(shi)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)沒(mei)(mei)有(you)(you)(you)(you)貫串(chuan)(chuan)整(zheng)個厚(hou)度(du)(du)截面(mian)(mian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)緣(yuan)(yuan)(yuan)(yuan)由(you);厚(hou)度(du)(du)方向(xiang)其他部(bu)(bu)位，因不(bu)(bu)(bu)(bu)存(cun)在(zai)(zai)(zai)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)，故斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)呈(cheng)現(xian)(xian)(xian)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)斷(duan)(duan)(duan)(duan)(duan)(duan)裂(lie)(lie)(lie)(lie)(lie)形(xing)貌。故綜(zong)合(he)來(lai)(lai)看，連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)應(ying)是(shi)拉(la)(la)(la)伸(shen)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)主(zhu)要(yao)緣(yuan)(yuan)(yuan)(yuan)由(you)。拉(la)(la)(la)伸(shen)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)與(yu)(yu)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)顯(xian)(xian)(xian)(xian)(xian)著(zhu)區別(bie)在(zai)(zai)(zai)于(yu)(yu)(yu)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)未(wei)發(fa)現(xian)(xian)(xian)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)特征(zheng)(zheng)和(he)(he)(he)(he)(he)匯集(ji)散(san)布的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)夾(jia)雜物(wu)(wu)(wu)，而(er)(er)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)特征(zheng)(zheng)明顯(xian)(xian)(xian)(xian)(xian)。異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)處存(cun)在(zai)(zai)(zai)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)，呈(cheng)壓扁(bian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)半網絡狀(zhuang)特征(zheng)(zheng)，左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)有(you)(you)(you)(you)明顯(xian)(xian)(xian)(xian)(xian)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)高(gao)(gao)(gao)(gao)(gao)(gao)溫(wen)(wen)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)圓(yuan)點(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)夾(jia)雜物(wu)(wu)(wu)、顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)組(zu)(zu)織(zhi)(zhi)(zhi)與(yu)(yu)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)堅(jian)持(chi)分(fen)(fen)(fen)歧(qi)，但(dan)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)有(you)(you)(you)(you)細微(wei)(wei)(wei)(wei)(wei)(wei)脫(tuo)碳(tan)(tan)(tan)(tan)現(xian)(xian)(xian)象(xiang)(xiang)，連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)低(di)倍檢(jian)驗(yan)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)。掃描電鏡(jing)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)察(cha)(cha)看結果(guo)進一(yi)步闡明異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)部(bu)(bu)位拉(la)(la)(la)伸(shen)前(qian)應(ying)已存(cun)在(zai)(zai)(zai)缺陷(xian)(xian)，且閱(yue)歷過(guo)(guo)(guo)高(gao)(gao)(gao)(gao)(gao)(gao)溫(wen)(wen)加(jia)(jia)熱(re)過(guo)(guo)(guo)程，而(er)(er)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)部(bu)(bu)位無缺陷(xian)(xian)。而(er)(er)光學(xue)顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)鏡(jing)察(cha)(cha)看發(fa)現(xian)(xian)(xian)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)左(zuo)(zuo)(zuo)(zuo)(zuo)近(jin)(jin)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)夾(jia)雜物(wu)(wu)(wu)、顯(xian)(xian)(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)組(zu)(zu)織(zhi)(zhi)(zhi)未(wei)見(jian)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)，與(yu)(yu)正(zheng)(zheng)(zheng)(zheng)(zheng)常(chang)(chang)(chang)(chang)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)堅(jian)持(chi)分(fen)(fen)(fen)歧(qi)，高(gao)(gao)(gao)(gao)(gao)(gao)強(qiang)(qiang)(qiang)(qiang)(qiang)度(du)(du)耐(nai)(nai)磨(mo)(mo)(mo)(mo)板(ban)(ban)(ban)(ban)(ban)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)特征(zheng)(zheng)來(lai)(lai)源于(yu)(yu)(yu)在(zai)(zai)(zai)加(jia)(jia)熱(re)前(qian)已存(cun)在(zai)(zai)(zai)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)，加(jia)(jia)熱(re)過(guo)(guo)(guo)程中(zhong)(zhong)(zhong)(zhong)，微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)內(nei)(nei)產(chan)(chan)生氧(yang)(yang)(yang)(yang)(yang)(yang)(yang)化(hua)(hua)(hua)(hua)(hua)(hua)特征(zheng)(zheng)，且在(zai)(zai)(zai)后(hou)續鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)軋(ya)制(zhi)(zhi)過(guo)(guo)(guo)程中(zhong)(zhong)(zhong)(zhong)，微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)雖有(you)(you)(you)(you)所閉(bi)合(he)但(dan)并未(wei)完(wan)整(zheng)消(xiao)逝(shi)，由(you)于(yu)(yu)(yu)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)較淺，肉眼(yan)難以(yi)(yi)(yi)發(fa)現(xian)(xian)(xian)，拉(la)(la)(la)伸(shen)時(shi)問題得到暴露。低(di)碳(tan)(tan)(tan)(tan)鋼(gang)(gang)(gang)(gang)(gang)，有(you)(you)(you)(you)較好的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)塑韌性(xing)(xing)(xing)(xing)(xing)，二(er)次(ci)切(qie)割(ge)時(shi)，鑄(zhu)坯(pi)(pi)(pi)(pi)呈(cheng)現(xian)(xian)(xian)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)幾率較小，但(dan)一(yi)旦呈(cheng)現(xian)(xian)(xian)，裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)通(tong)常(chang)(chang)(chang)(chang)較淺難以(yi)(yi)(yi)發(fa)現(xian)(xian)(xian)，若軋(ya)制(zhi)(zhi)時(shi)未(wei)完(wan)整(zheng)閉(bi)合(he)，會遺(yi)傳至(zhi)鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)，產(chan)(chan)生潛在(zai)(zai)(zai)風險，影(ying)響鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)質量，因而(er)(er)，在(zai)(zai)(zai)后(hou)續鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)消(xiao)費時(shi)，應(ying)穩(wen)定并固化(hua)(hua)(hua)(hua)(hua)(hua)二(er)次(ci)切(qie)割(ge)工藝規范(fan)，著(zhu)重關(guan)注(zhu)二(er)次(ci)切(qie)割(ge)后(hou)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)質量檢(jian)查，避免裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)連(lian)(lian)(lian)鑄(zhu)坯(pi)(pi)(pi)(pi)進入后(hou)道次(ci)軋(ya)制(zhi)(zhi)工序。鋼(gang)(gang)(gang)(gang)(gang)板(ban)(ban)(ban)(ban)(ban)外(wai)(wai)(wai)(wai)(wai)表(biao)(biao)微(wei)(wei)(wei)(wei)(wei)(wei)裂(lie)(lie)(lie)(lie)(lie)紋(wen)(wen)(wen)(wen)(wen)(wen)是(shi)拉(la)(la)(la)伸(shen)斷(duan)(duan)(duan)(duan)(duan)(duan)口(kou)(kou)異(yi)(yi)(yi)常(chang)(chang)(chang)(chang)的(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)(de)主(zhu)要(yao)緣(yuan)(yuan)(yuan)(yuan)由(you)。