Microstructure and Mechanical Properties of Capacitor Spot Welding Joint of Stainless Steel Sheet
摘 要
对0Cr18Ni9奥氏体不锈钢0.4 mm薄板进行了储能点焊试验,对其接头的显微组织和力学性能进行了分析研究.结果表明:焊接接头由熔核区、热影响区和熔核区向热影响区过渡的熔合区组成;熔核区显微组织由等轴奥氏体组成,由于储能焊极短的焊接时间和大的冷却速率,使熔核区的组织显著细化且具有快速凝固特征,其它区域组织与母材相当;当焊接电压为160 V、电极压力为18 N时,可获得有较高力学性能的焊接接头,其显微硬度为235.32 HV、抗剪强度为156.8 MPa.
Abstract
The capacitor spot welding of 0Cr18Ni9 austenitic stainless steel sheets in 0.4 mm thickness was carried out.The microstructure and mechanical properties were investigated.The results show that the welding joint was composed of the nucleus,the heat-affected zone(HAZ) and the fusion zone between melt nucleus and HAZ.There were equiaxed austenite in the nucleus.As a result of short weld period in the capacitor discharge welding and high cooling rate of the nucleus,the rest microstrueture was similar as the matrix,the grains were dramatically refined and had a characteristic of rapid solidification.The joint with high mechanical properties,whose microhardness was 235.32 HV and the shear strength was 156.8 MPa,could be obtained as the welding voltage U was 160 V and the electrode press force F was 18 N.
中图分类号 TG142.71
所属栏目 材料性能及其应用
基金项目
收稿日期 2009/4/28
修改稿日期 2009/12/12
网络出版日期
作者单位点击查看
备注徐峰(1977-),男,陕西西安人,讲师,硕士.
引用该论文: XU Feng. Microstructure and Mechanical Properties of Capacitor Spot Welding Joint of Stainless Steel Sheet[J]. Materials for mechancial engineering, 2010, 34(6): 64~66
徐峰. 不锈钢薄板储能焊点焊接头的显微组织与力学性能[J]. 机械工程材料, 2010, 34(6): 64~66
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参考文献
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【3】XU Jin-feng,ZHAI Qiu-ya,YUAN Sen.Energy-storage welding connection characteristics of AZ91D magnesium alloy rapid solidification ribbons[J].Journal of Materials Science and Technology,2004,20(4):431-433.
【4】雷鸣,翟秋亚,徐锦锋,等.Al2O3F/ADC12复合材料储能焊接头组织形成规律[J].焊接学报,2007(4):101-104.
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【6】李明,邱小明,孙大千,等.TiNi 形状记忆合金与不锈钢的储能焊[J].轻金属,2005(7):57-60.
【7】李明,邱小明,孙大千,等.TiNi形状记忆合金与不锈钢焊接接头性能比较[J].焊接,2005(3):10-20.
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【11】秦斌,王宝森.焊接速度对奥氏体不锈钢接头性能的影响[J].钢铁钒钛,2008(2):51-53.
【12】张文钺.焊接冶金学[M].北京:机械工业出版社,2005:185.
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