CN104162748A - 一种高强压力钢管埋弧焊接专用焊丝 - Google Patents

一种高强压力钢管埋弧焊接专用焊丝 Download PDF

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CN104162748A
CN104162748A CN201410418998.7A CN201410418998A CN104162748A CN 104162748 A CN104162748 A CN 104162748A CN 201410418998 A CN201410418998 A CN 201410418998A CN 104162748 A CN104162748 A CN 104162748A
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welding
welding wire
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steel plate
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张熹
牟淑坤
章军
金茹
陈延清
郭占山
刘宏
董现春
鞠建斌
张楠
王凤会
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Shougang Corp
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Abstract

一种高强压力钢管埋弧焊接专用焊丝，属于焊接材料领域，焊丝化学成分按重量百分数含为：0.08～0.2％C，0.1～0.3％Si，1.5～2.5％Mn,1.5～3.5％Ni，0～0.5％Cr，0.5～1.0％Mo，0～0.05％Al，0～0.2％Nb，0～0.2％V，0～0.2％Ti，0～0.01B，0～0.005％O，0～0.01％N，0～0.01％S，0～0.01％P，余量为Fe和不可避免的杂质元素。该焊丝与100kg级钢板制造的水电压力钢管相匹配，该焊丝与碱性焊剂匹配时能够获得适应100kg级钢板制造的水电压力钢管焊接接头要求的焊缝接头抗拉强度≥950MPa，-60℃冲击功≥47J，0℃冲击功≥100J。

Description

一种高强压力钢管埋弧焊接专用焊丝
技术领域
本发明属于焊接材料领域，特别涉及一种高强压力钢管埋弧焊接专用焊丝，适用于100kg级钢板制造的水电压力钢管的埋弧焊接。
背景技术
水电压力钢管通常是采用埋弧焊制管后使用的，随着水电装机容量提高及减量化进程的不断推进，水电压力钢管用钢强度级别不断提高。水电压力钢管使用环境恶劣，长期处于反复冲击载荷下工作，为了保证压力钢管的安全性，要求其具有足够的止裂性能，鉴于钢板强度与止裂性能呈反比关系，因此所用钢板的质量等级也随强度提高而提高，如60kg级钢板要求D级，80kg级钢板要求E级，100kg级钢板要求F级。由于焊接制管过程会导致焊缝、热影响区性能劣化，并有可能造成焊接缺陷，因此焊接接头成为压力钢管最薄弱的环节，其力学性能直接决定整个压力钢管的安全性。
目前80kg级水电压力钢管已逐步替代60kg级压力钢管，而采用100kg级钢板制造的水电压力钢管正在设计阶段，限制100kg级水电压力钢管应用的瓶颈是无100kg级钢板配套的埋弧焊焊丝及焊剂。本发明开发了一种100kg级钢板制造的水电压力钢管的埋弧焊丝，填补了国内100kg级钢板制造的水电压力钢管的埋弧焊丝的空白。
发明内容
本发明目的在于提供一种高强压力钢管埋弧焊接专用焊丝，与100kg级钢板制造的水电压力钢管相匹配，该焊丝与碱性焊剂匹配时能够获得适应100kg级钢板制造的水电压力钢管焊接接头要求的焊缝接头抗拉强度≥950MPa，-60℃冲击功≥47J，0℃冲击功≥100J。
焊丝化学成分按重量百分数含为：0.08～0.2％C，0.1～0.3％Si，1.5～2.5％Mn,1.5～3.5％Ni，0～0.5％Cr，0.5～1.0％Mo，0～0.05％Al，0～0.2％Nb，0～0.2％V，0～0.2％Ti，0～0.01B，0～0.005％O，0～0.01％N，0～0.01％S，0～0.01％P，余量为Fe和不可避免的杂质元素。
焊丝中C、Mn、Cr、Mo主要是通过向焊缝金属过渡合金元素，从而保证焊缝金属强度，而这几种元素对焊缝组织转变有较大影响且含量过高不利于韧性，因此要适量添加；
焊丝中Ni元素主要是通过向焊缝金属过渡合金元素，确保焊缝金属的低温韧性，并降低韧脆转变温度；
Si、Al主要是作为脱氧元素保证焊缝具有低的氧含量，从而获得良好的低温韧性；
Ti主要是起到脱氧剂的作用，并与O或N形成Ti2O3、TiN等形核核心，促进具有良好韧性的针状铁素体形成，从而保证焊缝具有优良韧性；
V可以和焊缝中的C、N形成细小的析出物，从而通过析出强化保证焊缝强度的作用；
Nb可以和焊缝中的C、N形成细小的析出物，起到细化焊缝组织的作用；
B主要是起到细化焊缝晶粒，提高淬透性的作用；
S、P作为有害焊缝韧性的元素，尽量控制在较低水平，即≤0.01％S，≤0.01％P。
由于焊丝和焊剂的使用是紧密联系的，焊剂要有足够的稳定性，才能保证在焊接过程中有良好的焊接操作性以及焊后焊缝有好的机械性能，以确保焊后构件的安全性。下述实施例中针对本发明所述焊丝选用了相应的焊剂，该焊剂即可以保证焊缝金属具有100～200ppm的低氧含量，又可以保证具有较好的成形性能和脱渣性能，从而保证焊缝具有良好的低温韧性，并减少焊接缺陷的出现几率。该焊剂由以下原料经高温烧结而成，成分按重量百分数含有8.0～20.0％CaO,10.0～30.0％MgO,20.0～40.0％CaF2,2.0～8.0％Na2O,1.0～5.0％K2O,1.0～5.0％MnO,0.1～1.0％FeO,20.0～30.0％SiO2,8.0～18.0％Al2O3,0.5～2.0％TiO2,0.01～0.1％ZrO2,该焊剂碱度为2.5～3.5。
本发明特别适用于100kg级钢板制造的水电压力钢管的埋弧焊接，可以保证100kg级压力钢管服役的安全性，焊接工艺适应性满足现场施工要求，易推广。
附图说明
图1为30mm钢板坡口示意图。
图2为20mm钢板坡口示意图。
具体实施方式
实施例1：
高强压力钢管埋弧焊接专用焊丝采用直径4mm，成分：0.11％C，0.25％Si，2.0％Mn,3.0％Ni，0.15％Cr，0.6％Mo，0.03％Al，0.04％Nb，0.04％V，0.15％Ti，0～0.005B，0.0025％O，0.004％N，0.004％S，0.008％P，其余为Fe。
埋弧焊所采用焊剂成分：10.0％CaO,18.0％MgO,30.0％CaF2,4.0％Na2O,2.0％K2O,1.0％MnO,0.4％FeO,21％SiO2,11.0％Al2O3，1.0％TiO2,0.03％ZrO2。
采用30mm厚Q890钢板，试板开不对称X型坡口，坡口如图1所示，钢板尺寸为600mm×200mm×30mm，留2mm钝边，两板不留间隙。
将30mm+30mm厚的Q890钢板，焊前预热至120℃，层间温度控制在160～180℃，焊前将坡口用砂轮机打磨见光，采用埋弧焊进行打底、填充、盖面。背面采用砂轮进行淸根后进行焊接填充至填满。
打底焊道焊接电流控制在450～500A，焊接电压控制在24～27V，焊接速度控制在350～400mm/min；填充焊道焊接电流控制在550～600A，焊接电压控制在26～29V，焊速控制在300～350mm/min，焊接热输入控制在30kJ/cm。
焊后经探伤未发现焊接缺陷，焊接变形小于3°，对焊接接头进行力学性能检验，结果表明，接头抗拉强度为980MPa，经180°，d＝4a冷弯未发现裂纹，焊缝-60℃冲击功77J，0℃冲击功110J，热影响区-60℃冲击功155J，0℃冲击功175J。
实施例2：
高强压力钢管埋弧焊接专用焊丝采用直径4mm，焊丝成分：0.11％C，0.25％Si，2.0％Mn,3.0％Ni，0.15％Cr，0.6％Mo，0.03％Al，0.04％Nb，0.04％V，0.15％Ti，0～0.005B，0.0025％O，0.004％N，0.004％S，0.008％P，其余为Fe。
埋弧焊所采用焊剂成分：10.0％CaO,18.0％MgO,30.0％CaF2,4.0％Na2O,2.0％K2O,1.0％MnO,0.4％FeO,21％SiO2,11.0％Al2O3,1.0％TiO2,0.03％ZrO2。
采用30mm厚Q890钢板，试板开V型坡口，坡口如图2所示，钢板尺寸为600mm×200mm×20mm，留2mm钝边，两板不留间隙。
将20mm+20mm厚的Q890钢板，焊前预热至100℃，层间温度控制在160～180℃，焊前将坡口用砂轮机打磨见光，采用埋弧焊进行打底、填充、盖面。背面采用砂轮进行淸根后进行焊接填充至填满。
打底焊道焊接电流控制在450～500A,焊接电压控制在24～27V，焊接速度控制在350～400mm/min；填充焊道焊接电流控制在550～600A，焊接电压控制在26～29V，焊速控制在300～350mm/min，焊接热输入控制在25kJ/cm。
焊后经探伤未发现焊接缺陷，焊接变形小于3°，对焊接接头进行力学性能检验，结果表明，接头抗拉强度为971MPa，经180°，d＝4a冷弯未发现裂纹，焊缝-60℃冲击功82J，0℃冲击功105J，热影响区-60℃冲击功147J，0℃冲击功168J。

Claims (1)

1.一种高强压力钢管埋弧焊接专用焊丝，其特征在于：焊丝化学成分按重量百分数含为：0.08～0.2％C，0.1～0.3％Si，1.5～2.5％Mn,1.5～3.5％Ni，0～0.5％Cr，0.5～1.0％Mo，0～0.05％Al，0～0.2％Nb，0～0.2％V，0～0.2％Ti，0～0.01B，0～0.005％O，0～0.01％N，0～0.01％S，0～0.01％P，余量为Fe和不可避免的杂质元素。
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CN106944763A (zh) * 2016-01-06 2017-07-14 宝钢特钢有限公司 一种高强度锰系耐磨钢焊丝
CN107283034A (zh) * 2017-07-22 2017-10-24 首钢集团有限公司 一种460MPa级抗震耐火耐候建筑结构的焊接方法
CN107553003A (zh) * 2017-09-20 2018-01-09 中国石油天然气集团公司管材研究所 一种低温服役环境x90钢级弯管、管件用埋弧焊丝
CN110303268A (zh) * 2019-06-17 2019-10-08 首钢集团有限公司 一种1000MPa级水电用钢埋弧焊丝及其制备方法和焊接方法
CN110682028A (zh) * 2019-10-15 2020-01-14 南京钢铁股份有限公司 一种用于屈服强度420MPa级耐火钢的埋弧焊丝
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CN112935628A (zh) * 2021-02-05 2021-06-11 天津市金桥焊材集团股份有限公司 一种1000MPa级超高强高韧气保实心焊丝
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CN106944763B (zh) * 2016-01-06 2020-01-21 宝钢特钢有限公司 一种高强度锰系耐磨钢焊丝
CN106944763A (zh) * 2016-01-06 2017-07-14 宝钢特钢有限公司 一种高强度锰系耐磨钢焊丝
CN106312372B (zh) * 2016-11-23 2019-10-18 四川西冶新材料股份有限公司 一种1000MPa高强钢焊接用气保护实心焊丝及其制备与焊接方法
CN106312372A (zh) * 2016-11-23 2017-01-11 四川西冶新材料股份有限公司 一种1000MPa高强钢焊接用气保护实心焊丝及其制备与焊接方法
CN107283034A (zh) * 2017-07-22 2017-10-24 首钢集团有限公司 一种460MPa级抗震耐火耐候建筑结构的焊接方法
CN107553003A (zh) * 2017-09-20 2018-01-09 中国石油天然气集团公司管材研究所 一种低温服役环境x90钢级弯管、管件用埋弧焊丝
CN110303268A (zh) * 2019-06-17 2019-10-08 首钢集团有限公司 一种1000MPa级水电用钢埋弧焊丝及其制备方法和焊接方法
CN110682028A (zh) * 2019-10-15 2020-01-14 南京钢铁股份有限公司 一种用于屈服强度420MPa级耐火钢的埋弧焊丝
CN114616072A (zh) * 2019-11-07 2022-06-10 株式会社神户制钢所 气体保护电弧焊用焊丝
CN114616072B (zh) * 2019-11-07 2023-10-10 株式会社神户制钢所 气体保护电弧焊用焊丝
CN110788457A (zh) * 2019-12-03 2020-02-14 四川西冶新材料股份有限公司 一种埋弧焊丝及其熔敷金属
CN112453662A (zh) * 2020-12-03 2021-03-09 南京钢铁股份有限公司 一种适用于1000MPa级高强钢的埋弧焊焊接工艺
CN112935628A (zh) * 2021-02-05 2021-06-11 天津市金桥焊材集团股份有限公司 一种1000MPa级超高强高韧气保实心焊丝
CN115558860A (zh) * 2022-10-14 2023-01-03 成都先进金属材料产业技术研究院股份有限公司 一种含钒铌的高强钢用焊丝钢水和高强钢用焊丝及其生产方法

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Application publication date: 20141126