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不锈钢焊管焊接腐蚀开裂是什么原因?

文章出处:cucut.net作者:责任编辑:
扫一扫!不锈钢焊管焊接腐蚀开裂是什么原因?扫一扫!
人气:-发表时间:2020-07-11 08:00【

   

【文章导读:】不锈钢焊管焊接不好都会出现腐蚀现象,304不锈钢焊管也是一样,304不锈钢焊管的焊接接头常常因腐蚀而损坏发生泄……

  不锈钢焊管焊接不好都会出现腐蚀现象,304不锈钢焊管也是一样,304不锈钢焊管的焊接接头常常因腐蚀而损坏发生泄漏现象,而且腐蚀多半发生在焊缝或热影响区,最常见的腐蚀类型有晶间腐蚀、应力腐蚀、和孔蚀。

  1、buxiuganghanguanhanjiejietoujingjianfushi,buxiugangguanzaigonghuozhuangtai(1050-1100℃)doujuyoulianghaodenaijingjianfushixingneng。gangguanzaihanjiehou,zaifushijiezhizhongshiyonghou,kefaxianzaihanfengfujinyouyanjingjiedefushi,zhuyaoshiyugedetanhuawuxichuyouguan,yinweihanjiecailiaodetanhanliangpiangaohuozheshihanjieshifashenglezengtanxianxiang,tongshihanhouhaishoudaotanhuawuxichumingandeminhuawendudezuoyongjuyoujingjianfushiqingxiang。suoyi304buxiuganghanguanhanjiechulexuanyongyouzhihancaizhiwai,hanfengshejiyaocongfangzhijingjianfushidejiaoduchufabimianshizixing、dingzixingdehanfeng,jiechufushijiezhidehandaohouhandeng。weilefangzhihanfengdejingjianfushitongchangjinkenengjiangditanhanliang,zengjiani、taiyutanqinheligengqiangdeyuansuhancai,yifangzhigedetanhuawuxichu,xianzhutigaohanfengnaijingjianfushidexingneng。aoshitibuxiuganghanfengzhongdeshaoliangtiesutibujinduifangzhihexiaochureliewenyouli,tongshiduitigaonaijingjianfushidezuoyongyeshiyouhaochude,tiesuticunzaiyuaoshitijinglizhijian,xiaochuaoshitizhuzhuangjing、shuzhizhuangjingdefangxiangxing,geduanaoshitijingjielianxuwangzhuangtanhuawuxichu,congerfangzhijingjianfushi。yincichulegeyiwai,hanfengzhongtianjiatiesutixingchengyuansumo/nb、tidengyouliyutigaohanfengdenaishixing。

  2、buxiuganghanguanhanjiejietouyinglifushikailie。buxiuganghanguandeyinglifushishizaijinglashenyinglizuoyongxiahezailvhuawu、qingyanghuawu、liuhuawudengtedingjiezhizhongchanshengde,hanjiejietouzaihanhouweijingrechulideqingkuangxia,jietouchucunzaihendadecanyuyingli,youshikedadaoqufuxianzhihoufashengyinglifushikailie。changyongde304/316lbuxiuganghanguanzaiyinglifushihuanjingxiamingan,xuanzetianjiati、nbde18-8xinghancaizaijinxinghanhouxiaochuyinglichuli,lirubuxiuganghanguan、guanxianhanhoudouxujinxing940℃wendinghuachuli。zaiaoshitibuxiugangguanzhong,suizheniehanliangdezengjia,ketigaoqizaixuduojiezhidenaiyinglifushizhongdechuanjingxingyinglifushi。muzaiaoshitibuxiugangzhongduifangzhiyinglifushiwuwuzhijiezuoyong,dantakeyitigaonaikongshixingneng,erkongshichangchangshiyinglifushideqiyuan。yincihanmugangtigaolec1yinqidekongshicongergaishanlenailvhuawuyinglifushixingneng。suoyigaonie、gaomubuxiugangnaiyinglifushibiyibanaoshitibuxiuganghao。

  3、不锈钢焊管焊接接头孔蚀。在C1.Br.离子的介质中,钢管内外表面常发生孔蚀。主要是金属夹杂物、析出相、晶界露头等处钝化膜较脆弱。焊缝晶粒大,疏松焊接时焊剂、药皮的冶金反应,同样的条件焊缝比母材孔蚀敏感性大。同时由于焊接时的飞贱、表面氧化色使钢管的表面钝化膜遭到破坏。在C1离子溶液中引起孔蚀。防止焊接头孔蚀,首先提高焊缝金属的纯洁度,减少焊缝杂质以及焊后仔细清理焊缝及其母材附近的表面再进行钝化处理。为提高焊接头的再钝化能力选用高Cr/Mo的奥氏体及配套焊材,保持焊缝纯洁度的气体保护焊工艺。

  盛通管业提示您在选择不锈钢焊管时一定要仔细检测不锈钢焊管的焊接问题,选择有生产资质的大厂家采购,以防止在使用过程中出现腐蚀现象造成不必要的麻烦。全国服务热线:155-0534-0574.



                                  


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