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Abstract：
Advancement in technology demands the joining of heterogeneous metals of low and high-carbon steel grades. In this investigation, AISI1018 low and AIS4340 medium carbon steels were welded to form a heterogeneous thin metal joint using the Manual Metal Arc Welding (MMAW) method. Experimental variations of welding current, electrode position, and weld orientation are selected as the MMAW parameters. The trials are planned using the Full Factorial Design (FFD) and the trial results are analysed using Analysis of Variance (ANOVA) and regression methods. A computerized tensile testing machine (TM2101N) was used to test the tensile strength of the welded specimens that were prepared in accordance with the ASTM E646 - 98 standards. The prediction model for tensile strength was generated based on regression analysis. The ANOVA and prediction model helped in studying the effect of the MMAW parameters.
摘要：
技术的进步要求连接低碳钢和高碳钢等级的异质金属。在这次调查中,使用手动金属弧焊（MMAW）方法将AISI1018低碳钢和AIS4340中碳钢焊接成异质薄金属接头。焊接电流的实验变化，电极位置,和焊接方向选择作为MMAW参数。使用全因子设计（FFD）计划试验，并使用方差分析（ANOVA）和回归方法分析试验结果。使用计算机拉伸试验机(TM2101N)来测试根据ASTME646-98标准制备的焊接试样的拉伸强度。基于回归分析建立了抗拉强度预测模型。方差分析和预测模型有助于研究MMAW参数的影响。
