热输入对00Cr11Ti铁素体不锈钢焊接过热区组织及力学性能的影响
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摘要
00Cr11Ti铁素体不锈钢是一种典型的镍资源节约型环保不锈钢。然而该种钢在焊接时,焊接热输入的变化会严重影响焊接接头处的性能。针对此问题,研究了不同热输入对00Cr11Ti铁素体不锈钢板焊后微观组织和力学性能的影响,采用金相显微镜观察熔敷金属和过热区的金相组织,并使用Image J软件测量平均晶粒尺寸;采用洛氏硬度计测量了熔敷金属以及过热区的硬度。结果表明:熔敷金属及过热区的晶粒尺寸随热输入的升高而增大;过热区硬度随热输入的升高而降低,适当控制热输入对于改善00Cr11Ti铁素体不锈钢的焊接接头处的性能具有积极作用。
00Cr11Ti ferritic stainless steel is a typical nickel resource conserving stainless environmental friendly steel.However, when the steel is welded, the performance of the welding joint will be seriously affected by the change of welding heat input. Aiming at this problem, the effect of different heat input on microstructure and mechanical properties of 00Cr11Ti ferritic stainless steel plate was studied. The metallographic structure of deposited metal and overheated zone was observed by metallographic microscope, and the average grain size was measured by Image J software. The hardness of deposited metal and overheated zone was measured by the Rockwell hardness tester. The results show that the grain sizes of the deposited metal and overheated zone increase with the increase of heat input, and the hardness of overheated zone decreases with the increase of heat input. Proper control of heat input has a positive effect on improving the performance of welded joint of 00Cr11Ti ferritic stainless steel.
00Cr11Ti ferritic stainless steel is a typical nickel resource conserving stainless environmental friendly steel.However, when the steel is welded, the performance of the welding joint will be seriously affected by the change of welding heat input. Aiming at this problem, the effect of different heat input on microstructure and mechanical properties of 00Cr11Ti ferritic stainless steel plate was studied. The metallographic structure of deposited metal and overheated zone was observed by metallographic microscope, and the average grain size was measured by Image J software. The hardness of deposited metal and overheated zone was measured by the Rockwell hardness tester. The results show that the grain sizes of the deposited metal and overheated zone increase with the increase of heat input, and the hardness of overheated zone decreases with the increase of heat input. Proper control of heat input has a positive effect on improving the performance of welded joint of 00Cr11Ti ferritic stainless steel.
引文
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[8]刘腊腊,胡绳荪,申俊琦,等.激光焊接热输入对26Cr-3.5Mo铁素体不锈钢组织性能的影响[J].中国激光,2015,42(2):101-107.
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[3]国旭明,柳春恕,袁进伟.铁素体不锈钢TIG焊接头组织与性能研究[J].航空材料学报,2011,31(3):56-59.
[4]Yan W,Zhang H,Jiang Z G.Multi-objective optimization of arc welding parameters:the trade-offs between energy and thermal efficiency[J].CleanerProduction,2017,140(3):1842-1849.
[5]胡登纯,王青春,苏龙,等.CO2焊在修复钢制车身中的焊接缺陷分析与控制[J].热加工工艺,2017,46(21):258-261.
[6]张恒,游国强,段平安,等.焊接气孔检测技术的研究进展[J].热加工工艺,2017,46(5):19-24.
[7]王飞翔.焊接工艺对SUS444铁素体不锈钢焊接接头组织和力学性能的影响[J].热加工工艺,2013,42(3):193-195.
[8]刘腊腊,胡绳荪,申俊琦,等.激光焊接热输入对26Cr-3.5Mo铁素体不锈钢组织性能的影响[J].中国激光,2015,42(2):101-107.