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首页> 外文期刊>Materials and Manufacturing Processes >Effect of automated MIG welding process parameters on ASTM A 106 Grade B pipe weldments used in high-temperature applications
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Effect of automated MIG welding process parameters on ASTM A 106 Grade B pipe weldments used in high-temperature applications

机译：自动化MIG焊接工艺参数对高温应用中ASTM 106级管焊的影响

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摘要

This paper presents the investigation on welding of ASTM A 106 Grade B pipes to access the quality of weldments for mechanical and metallurgical characteristics by varying the influencing factors such as voltage, wire feed rate of the filler material, and gas flow rate of CO2. The experiment was conducted using an automated MIG welding setup that has the capacity to weld the pipes with diameter ranging from 20 to 90mm. Further the welded samples are subjected to various tests to identify weld defects, weld bead geometry, microstructure, hardness, tensile strength, and fractography. The output responses such as reinforcement form factor, penetration shape factor, and tensile strength of the material are analyzed using Taguchi method and optimized results were reported and validated. The direct and interaction plots drawn between input parameters and output responses serves as a good indicator for achieving the quality weldments by the appropriate selection of process parameters. Fractography of the weldments signifies the type of failure is brittle in nature and the fractured surfaces consists of microvoids, double dimple sizes, shear lips, plastic flow, and cleavage facets.
机译：本文提出了通过改变填充材料的电压，焊丝进给速率等影响因素，对机械和冶金特性焊接的焊接质量，通过CO 2的焊丝进给速率等影响因素来进入机械和冶金特性的焊接质量。使用自动化的MIG焊接设置进行实验，该设施具有焊接直径范围为20至90mm的管道的能力。此外，焊接样品经受各种测试以识别焊接缺陷，焊缝几何形状，微观结构，硬度，抗拉强度和断裂。使用Taguchi方法分析了材料的输出响应，例如增强形状因子，渗透形状因子和材料的拉伸强度，并报告并验证了优化的结果。 The direct and interaction plots drawn between input parameters and output responses serves as a good indicator for achieving the quality weldments by the appropriate selection of process parameters.焊接的Fretcography表示故障的类型是自然界的脆性，骨折表面由微宽度，双窝尺寸，剪力嘴唇，塑料流和裂缝方面组成。

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