影響不鏽鋼裝飾管焊接過程中出現熱裂紋的現象有哪些因素

      在(zai)不(bu)鏽(xiu)鋼(gang)裝(zhuang)飾(shi)管(guan)工(gong)藝(yi)中(zhong)
，有(you)許(xu)多(duo)工(gong)藝(yi)因(yin)素(su)會(hui)影(ying)響(xiang)焊(han)接(jie)過(guo)程(cheng)中(zhong)產(chan)生(sheng)的(de)熱(re)裂(lie)紋(wen)。例(li)如(ru)，預(yu)熱(re)溫(wen)度(du)
，結(jie)構(gou)剛(gang)度(du)和(he)工(gong)件(jian)夾(jia)緊(jin)條(tiao)件(jian)會(hui)影(ying)響(xiang)焊(han)縫(feng)的(de)抗(kang)熱(re)裂(lie)性(xing)。

      焊(han)接(jie)規(gui)格(ge)。使(shi)用(yong)大(da)電(dian)流(liu)，線(xian)性(xing)傳(chuan)輸(shu)杆(gan)等(deng)
，容(rong)易(yi)引(yin)起(qi)焊(han)接(jie)應(ying)力(li)措(cuo)施(shi)
，以(yi)促(cu)進(jin)熱(re)裂(lie)紋(wen)的(de)產(chan)生(sheng)。因(yin)此(ci)，在(zai)條(tiao)件(jian)允(yun)許(xu)的(de)情(qing)況(kuang)下(xia)
，應(ying)盡(jin)可(ke)能(neng)使(shi)用(yong)小(xiao)電(dian)流(liu)和(he)多(duo)層(ceng)焊(han)接(jie)，以(yi)減(jian)少(shao)熱(re)裂(lie)的(de)趨(qu)勢(shi)。當(dang)焊(han)接(jie)具(ju)有(you)大(da)結(jie)構(gou)剛(gang)度(du)的(de)工(gong)件(jian)時(shi)
，經(jing)常(chang)使(shi)用(yong)預(yu)熱(re)方(fang)法(fa)。預(yu)熱(re)一(yi)方(fang)麵(mian)降(jiang)低(di)冷(leng)卻(que)速(su)率(lv)，減(jian)慢(man)冷(leng)卻(que)過(guo)程(cheng)中(zhong)產(chan)生(sheng)的(de)拉(la)伸(shen)應(ying)力(li)
，另(ling)一(yi)方(fang)麵(mian)改(gai)善(shan)結(jie)晶(jing)條(tiao)件(jian)並(bing)減(jian)少(shao)化(hua)學(xue)和(he)物(wu)理(li)不(bu)均(jun)勻(yun)性(xing)。預(yu)熱(re)溫(wen)度(du)取(qu)決(jue)於(yu)不鏽鋼管的de化hua學xue成cheng分fen和he結jie構gou剛gang度du。鋼gang的de碳tan含han量liang越yue高gao，其qi他ta合he金jin元yuan素su越yue多duo
，工gong作zuo剛gang度du越yue高gao，所suo需xu的de預yu熱re溫wen度du越yue高gao。焊han接jie工gong藝yi。如ru果guo焊han接jie工gong藝yi不bu同tong
，相xiang同tong的de焊han接jie性xing能neng材cai料liao具ju有you產chan生sheng熱re裂lie紋wen的de不bu同tong趨qu勢shi。原yuan因yin是shi焊han接jie應ying力li因yin焊han接jie順shun序xu不bu同tong而er不bu同tong。焊han接jie應ying力li應ying通tong過guo合he理li的de焊han接jie順shun序xu更geng小xiao化hua。

      yalirongqihanjielengliewenzhuyaofashengzaihanjiejietouzhouwei，youshihuiyanshendaohanfengzhong。hanjiehouyoushihuichuxianlengliewen，danyoushixuyaoshuxiaoshi，shutianshenzhigengchangshijian。hanjieyiduanshijianhouchuxiandezhexieliefengyechengweiyanchiliefeng。zaizhizaoguochengzhongkenengwufafaxianyanchiliefeng，bingqiezaishiyongguochengzhongkenenghuichanshengjiqiyanzhongdehouguo。yinci，tabiyibanliefenggengyouhai。zaibiaodafangmianyoujizhongleixingdelengliewen：邊(bian)界(jie)裂(lie)縫(feng)，下(xia)穿(chuan)裂(lie)縫(feng)和(he)根(gen)裂(lie)縫(feng)。邊(bian)界(jie)裂(lie)縫(feng)從(cong)焊(han)縫(feng)和(he)基(ji)底(di)金(jin)屬(shu)的(de)連(lian)接(jie)處(chu)開(kai)始(shi)並(bing)延(yan)伸(shen)到(dao)基(ji)底(di)金(jin)屬(shu)中(zhong)。焊(han)道(dao)下(xia)方(fang)的(de)裂(lie)縫(feng)位(wei)於(yu)焊(han)道(dao)下(xia)方(fang)的(de)接(jie)縫(feng)區(qu)域(yu)附(fu)近(jin)，並(bing)且(qie)不(bu)會(hui)發(fa)展(zhan)到(dao)基(ji)底(di)金(jin)屬(shu)的(de)表(biao)麵(mian)。根(gen)部(bu)裂(lie)紋(wen)源(yuan)自(zi)熱(re)影(ying)響(xiang)區(qu)，其(qi)中(zhong)焊(han)縫(feng)根(gen)部(bu)的(de)應(ying)力(li)集(ji)中(zhong)集(ji)中(zhong)，並(bing)延(yan)伸(shen)到(dao)基(ji)底(di)金(jin)屬(shu)或(huo)焊(han)縫(feng)中(zhong)。

      zaijiefenghuohanfengzhongxingchengdelengliewenyujinshuxiangbianguochengzhongjixiexingnengdejijubianhuahefuzadeyinglizhuangtaiyouguan。lengliewenzhuyaofashengzaizhongtangang，gaotanganghegaoqiangdugangzhong。zhezhonggangdezhuyaotezhengshiyiyucuihuo，daozhiyanzhongdeaoshitiguorehexianzhedejinglishengchang。congjinxiangxuekezhi，cuaoshitigengrongyicuihuobingzhuanbianchengcudademashitijiegou，zheshidejinjiefengquyuzhongdejinshuxingnengliehua
，tebieshisuxingjiangdibingqiecuixingzengjia。cishi，zaifuzadehanjieyinglidezuoyongxiafashenglenglie。zaihanjiedegaowenxia
，yixiehanqinghuahewuzaiyuanzizhuangtaixiafenjieqing，bingqiedaliangdeqingrongjiezairongchijinshuzhong。suizheyuwenjiangdi，qingzaijinshuzhongderongjiedujijuxiajiang。raner，hanchidelengquesudufeichangkuai
，qingmeiyoushijianyichubingbaoliuzaihanfengjinshuzhong。qingzaiaoshitihetiesutizhongderongjieduhekuosannengliyecunzaixianzhechayi。

      tongchang，hanjiejinshudetandangliangzongshidiyujidijinshudetandangliang，yincizaihanjiedejiaogaowenduxiafashengaoshitifenjie，bingqiezaijinjiefengquyuzhongshangweifashengaoshitizhuanbian。qingzaihanfengjinshuzhongderongjieduturanxiajiang。suizhewendudejiangdi
，jinxiafengqudeaoshitifashengbianhua
，wenduyijingjiangdi，qingderongjiedujiangdi，kuosannengliyijinghenruo。ranhou，qingyiqitaijinrujinshudexikongbingchanshengdadeyali，daozhijubujinshuchanshengdadeyingli
，congerxingchenglengliewen。