研究800 MPa级冷轧双相钢电阻点焊工艺,分析点焊电流对接头形貌、性能以及组织缺陷的影响规律,讨论回火脉冲对提升接头性能的影响。结果表明:点焊电流对高强钢DP800接头形貌、性能及缺陷等均有较大影响;当点焊电流达到10 k A时,剪切试...研究800 MPa级冷轧双相钢电阻点焊工艺,分析点焊电流对接头形貌、性能以及组织缺陷的影响规律,讨论回火脉冲对提升接头性能的影响。结果表明:点焊电流对高强钢DP800接头形貌、性能及缺陷等均有较大影响;当点焊电流达到10 k A时,剪切试验为纽扣型断裂模式,最大剪切力达到34.28 k N;点焊脉冲后附加回火脉冲可以提高点焊接头性能。展开更多
The quiet steel has been favored by automobile manufacturers for its advantage in shock absorption and noise reduction.However,there is less research on the welding performance of quiet steel plates.In this paper,the ...The quiet steel has been favored by automobile manufacturers for its advantage in shock absorption and noise reduction.However,there is less research on the welding performance of quiet steel plates.In this paper,the welding lobe of 1.0 mm quiet steel is studied.The comprehensive evaluation of spot welded joints was carried out by evaluation methods such as metallographic structure,microhardness,shear tensile and cross-tensile.The result showed that when the welding heat input was small,the interlayer of the quiet steel plate was not completely fused,and when the heat input was enough,the composite interlayer is completely fused with the steel plate,and the mechanical properties were good.The welding lobe of the quiet steel reaches 4.2 kA with good comprehensive mechanical properties and good weldability.展开更多
文摘研究800 MPa级冷轧双相钢电阻点焊工艺,分析点焊电流对接头形貌、性能以及组织缺陷的影响规律,讨论回火脉冲对提升接头性能的影响。结果表明:点焊电流对高强钢DP800接头形貌、性能及缺陷等均有较大影响;当点焊电流达到10 k A时,剪切试验为纽扣型断裂模式,最大剪切力达到34.28 k N;点焊脉冲后附加回火脉冲可以提高点焊接头性能。
文摘The quiet steel has been favored by automobile manufacturers for its advantage in shock absorption and noise reduction.However,there is less research on the welding performance of quiet steel plates.In this paper,the welding lobe of 1.0 mm quiet steel is studied.The comprehensive evaluation of spot welded joints was carried out by evaluation methods such as metallographic structure,microhardness,shear tensile and cross-tensile.The result showed that when the welding heat input was small,the interlayer of the quiet steel plate was not completely fused,and when the heat input was enough,the composite interlayer is completely fused with the steel plate,and the mechanical properties were good.The welding lobe of the quiet steel reaches 4.2 kA with good comprehensive mechanical properties and good weldability.
