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首页> 外文期刊>International journal of structural integrity >Impact of process parameters of resistance spot welding on mechanical properties and micro hardness of stainless steel 304 weldments
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Impact of process parameters of resistance spot welding on mechanical properties and micro hardness of stainless steel 304 weldments

机译：电阻点焊工艺参数对不锈钢304焊件力学性能和微硬度的影响

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Purpose - Resistance spot welding (RSW) is an essential process in the automobile sector to join the components. The steel is the principal material utilized in car generation because of its high obstruction against erosion, toughness, ease of support and its recuperation potential. Due to this, it was planned to study the mechanical properties, hardness and microstructure characteristics of RSW of Stainless steel 304. Design/methodology/approach - In the present research, RSW of 304 stainless steel plates with 1 mm thickness and effect of current intensity, welding time, electrode pressure and holding time on nugget diameter, tensile strength microhardness and microstructure of the joints was investigated. The specimens were prepared according to the dimensions of 30 × 100 mm with 30 mm overlaps joint through the RSW machine. The tensile test of the specimen was carried out on a universal testing machine and microhardness of specimens measured using Vickers's hardness tester. Taguchi L16 orthogonal array was used to scrutinize the significant parameters for each output. Findings - It has been observed that the tensile strength of the specimen is affected by the current intensity and nugget diameter, and the weld time has a significant effect on the tensile strength. Microhardness is highly influenced by electrode pressure and holding time, as the increase in both these parameters resulted in the increase of microhardness. This is due to rapid cooling, which is done by the cooling water flowing through the copper electrodes. Originality/value - This study was carried out using a copper electrode with a flat face with selected parameters and response factors. The study can be useful for researchers working on optimization of welding parameters on stainless steel.
机译：目的 - 电阻点焊（RSW）是汽车扇区的必备过程，用于加入组件。钢是汽车发电中使用的主要材料，因为它具有抗腐蚀，韧性，易于支持及其恢复潜力的高障碍。因此，计划研究不锈钢304的RSW的机械性能，硬度和微观结构特性。设计/方法/方法 - 在本研究中，RSW为304个不锈钢板，厚度为1毫米，电流强度效果，研究了焊接时间，电极压力和保持时间，研究了关节的拉伸强度微硬度和显微组织。根据通过RSW机器的30mm具有30mm的30×100mm的尺寸，根据30×100mm的尺寸制备。样本的拉伸试验在使用维克斯的硬度测试仪测量的标本的通用试验机和微硬度上进行。 Taguchi L16正交阵列用于仔细审查每个输出的重要参数。结果 - 已经观察到样品的拉伸强度受电流强度和熔块直径的影响，并且焊接时间对拉伸强度具有显着影响。微硬度受电极压力和保持时间的高度影响，因为这两种参数的增加导致微硬度的增加。这是由于快速冷却，通过流过铜电极的冷却水完成。原创性/值 - 本研究使用具有具有选定参数和响应因子的平面的铜电极进行。该研究对于研究不锈钢焊接参数的研究人员有用。

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