中低温热处理对SUS304不锈钢TIG焊接接头组织及力学性能的影响
Effect of Heat Treatment on Microstructure and Properties of SUS304 Stainless Steel TIG Welded Joint
- 2022年52卷第2期 页码:63-68
DOI: 10.7512/j.issn.1001-2303.2022.02.09
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鲍庆臣,渠怀志,史建强,等.中低温热处理对SUS304不锈钢TIG焊接接头组织及力学性能的影响[J].电焊机,2022,52(2):63-68.
BAO Qingchen, QU Huaizhi, SHI Jianqiang, et al.Effect of Heat Treatment on Microstructure and Properties of SUS304 Stainless Steel TIG Welded Joint[J].Electric Welding Machine, 2022, 52(2): 63-68.
轨道交通车辆在冲击振动试验后,部分设备SUS304不锈钢焊接件出现断裂失效现象。为了提升SUS304不锈钢焊后机械性能,采用金相显微镜、扫描电镜、硬度测试及拉伸试验等方法,研究了中低温热处理工艺对2 mm厚SUS304不锈钢板TIG焊接接头的组织及力学性能的影响。研究发现,经400 ℃热处理30 min及焊接后未处理态焊缝组织均由γ-奥氏体与δ-铁素体组成,δ-铁素体主要分布于富Cr区呈蠕虫状,热处理后δ-铁素体含量有一定程度的减少。焊接接头热处理后硬度值整体较未处理态低,焊后焊缝屈服强度为189.5 MPa,应变为64.5%,热处理后屈服强度为221 MPa,应变为72.7%,屈服强度提升了16.6%,达到母材的屈服强度。断口呈现出韧性断裂特征且无显著焊接缺陷,主要呈现出较深的韧窝,韧窝分布着第二相粒子,第二相粒子阻碍滑移造成应力集中而产生微坑,成为裂纹的主要发源地之一。
After the impact and vibration test of rail transit vehicles, some equipment 304 stainless steel welded parts appeared fracture failure. In order to improve the mechanical properties of 304 stainless steel after welding, in this paper, by means of metallographic microscope, scanning electron microscope, hardness and tensile test, the effects of medium and low temperature heat treatment process on the microstructure and mechanical properties of 2 mm thick 304 stainless steel plate TIG welded joints were studied. It is found that the microstructure of the untreated weld is composed of γ-austenite and δ-ferrite after heat treatment at 400 ℃ for 30 min, and δ-ferrite mainly distributes in the Cr-rich zone and appears as a worm, and the content of δ-ferrite decreases to some extent after heat treatment. After heat treatment, the hardness of welded joints is lower than that of untreated ones. The yield strength of welded joints after welding is 189.5 MPa, and the strain is 64.5%. After heat treatment, the yield strength is 221 MPa, the strain is 72.7%, and the yield strength is increased by 16.6%, reaching the yield strength of base metal. The fracture surface shows ductile fracture characteristics and no significant welding defects, mainly showing deep dimples, and the dimples are distributed with second phase particles, which hinder the slip and cause stress concentration and produce micro-pits, which become one of the main craters of cracks.
SUS304TIG焊中低温热处理微观组织力学性能
SUS304TIG weldinglow temperature heat treatmentmicrostructuremechanical properties
Kurt H, Samur R. Study on microstructure, tensile test and hardness 304 stainless steel jointed by TIG welding[J]. International Journal of Science and Technology , 2013,2(2):163-168.
薄鑫涛.常用不锈钢种类及特点[J]. 热处理, 2017, 32(02):56.
BO Xintao. Types and characteristics of common stainless steel[J]. Heat Treatment,2017, 32(02):56.
Erinosho M F, Akinlabi E T, Ogundimu E O. Study on microstructure and mechanical properties of 304 stainless steel joints by Tig-Mig hybrid welding[J]. Surface Review & Letters, 2018, 25(01):1-14.
Li Z, Gobbi S L. Laser welding for lightweight structures[J]. Journal of Materials Processing Technology, 1997, 70(1-3):137-144.
Feng L, Yang N. Stainless Steel Welding and Development Trend of Welding Technology[J]. IOP Conference Series Earth and Environmental Science, 2019(252):022117.
Chidambaram S, Srinivasan R. Study & Optimization on the effect of welding current & active flux coating thickness in the weld profile of Al-SiC composite weldment using A-TIG welding[J]. Journal of Advanced Research in Dynamical and Control Systems, 2017, Special Issue(11):409-418.
黄彦良,Brian Kinsella, Thomas Becker, 等.原子力显微镜评价奥氏体不锈钢晶间腐蚀敏感性的研究[J].材料开发与应用,2008(03): 7-11.
HUANG Yan Liang,Brian Kinsella, Thomas Becker, et al. Identification of Sensitization of Austenitic Stainless Steel to Intergranular Stress Corrosion Cracking by Atomic Force Microscopy[J]. Development and Application of Materials,2008(03): 7-11.
王建. 晶间腐蚀的危害及原因分析[J]. 铸造技术,2011,32(12):1756-1759.
WANG Jing. Perniciousness and Prevention Measure of Inter-crystalline Erosion[J]. Foundry Technology,2011,32(12):1756-1759.
罗宏,龚敏. 奥氏体不锈钢的晶间腐蚀[J]. 腐蚀科学与防护技术,2006,18(5): 357-360.
LUO Hong,GONG Min.On intergranular corrosion of austenitic stainless steel[J]. Corrosion Science and Protection Technology, 2006,18(5): 357-360.
Mishra D, Dakkili M. Gas tungsten and shielded metal arc welding of stainless steel 310 and 304 grades over single and double ‘V’ butt joints[J]. Materials Today: Proceedings, 2020(27):772-776.
冯小松. 应变强化技术在低温储罐轻型化设计中的应用[D]. 北京:北京化工大学, 2012.
FENG Xiaosong. Application of Strain-Streng-Thening technology in the Light-Weight design of Liquefied-gas Cryogenic Tanks[D]. Beijing:Beijing University of Chemical Technology,2012.
郭国林,刘鹏, 杨莉,等. 热处理对304 不锈钢板激光焊接接头组织和力学性能的影响[J]. 热加工工艺, 2016,45(21):194-200.
GUO Guolin,LIU Peng,YANG Li,et al. Effect of Heat Treatment on Microstructure and Mechanical Properties of Laser Welded Joint of 304 Stainless Steel Plate[J]. Hot Working Technology,2016,45(21):194-200.
杨晓禹, 田一清, 毛红奎,等. 热处理工艺对双相不锈钢S32101 焊接接头力学性能与微观组织的影响[J]. 热加工工艺,2019,21(48):153-155.
YANG Xiaoyu,TIAN Yiqing,MAO Hongkui,et al. Effect of Heat Treatment Process on Mechanical Properties and Microstructure of Duplex Stainless Steel S32101 Welded Joints[J].Hot Working Technology,2019,21(48):153-155.
Saeid Ghorbani, Reza Ghasemi, Reza Ebrahimi-Kahrizsangi,et al. The effect of heat treatment after welding on the microstructure, mechanical properties, and corrosion resistance of dissimilar stainless steels[J]. Materials Science & Engineering A, 2017(688):470-479.
孙会兰,毕子墨,张迪,等. 不同热处理条件下高氮奥氏体不锈钢冷轧组织与力学性能研究[J]. 矿冶工程,2021,41(04):117-120,124.
SUN Huilan, BI Zimo, ZHANG Di,et al. Microstructure and Mechanical Properties of High Nitrogen Austenitic Stainless Steel After Cold Rolling by Different Heat Treatment[J]. Mining and Metallurgical Engineering, 2021,41(04):117-120,124.
陈双建. SUS304拼焊管非均质接头组织力学行为及塑变性能优化[D]. 黑龙江:哈尔滨工业大学, 2012.
CHEN Shuangjian. Microstructure evolution and mechanical behavior of hererogeneous joint and plastic deformation optimi-zation of SUS304 tailor-welded tube[D].Heilongjiang:Harbin Institute of Technology,2012.
何远灵. SUS304不锈钢TIG焊接接头的组织表征与性能研究[D]. 山西:山西农业大学, 2019.
HE Y L. Microstructure Characterization and Properties Investigation of Welded Joint of SUS304 Stainless Steel with TIG Welding[D]. Shanxi:Shanxi Agricultural University,2019.
许云秀. 奥氏体不锈钢0Cr21Mn17Mo2N0.8腐蚀及疲劳性能研究[D]. 吉林:长春工业大学, 2019.
XU Y X.Austenitic stainless steel 0cr21mn17mo2n0 8 study on corrosion and fatigue properties[D]. Jilin:Changchun University of Technology,2019.
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