摘要本文基于 CMT 的304不锈钢基板MIG电弧增材制造技术，利用er308不锈钢焊丝进行增材制造工艺试验研究。分别从送丝速度，焊接电压，焊接速度等方面对实验进行了优化，分析了多层焊部分外观形貌、微观组织、显微维氏硬度以及拉伸强度等性能，304不锈钢基板增材制造的工艺特点、焊缝组织和性能特点等，对304不锈钢材料增材制造的成形情况以及增材性能进行了相关的研究。最终得到了较为合适的焊接工艺参数。通过实验可得，在送丝速度为3。5mm/s、焊接电流125A、焊接电压14。8V以及焊接速度为10cm/min的时候，焊接结果良好。此时单道单层焊接焊缝的硬度比母材稍高，但低于热影响区，单道多层焊层间结合区的硬度，平均为175HV,低于层间熔合区的180HV，高于母材处硬度,平均值为172HV。焊道横向的最大抗拉强度为550MPa。87861

毕业论文关键词   电弧增材   304不锈钢   焊接工艺   性能

毕业设计说明书外文摘要

Title    Experimental research on the technology of   Robot MIG                                     

Abstract In this paper, based on the CMT 304 stainless steel substrate MIG arc enhancement manufacturing technology, the use of er308 stainless steel welding wire for the manufacturing process of the test。 Respectively from the wire feed speed, welding voltage, welding speed is used to optimize the experimental, the multi-layer welding part of morphology, microstructure, micro Vickers hardness and tensile strength of the performance is analyzed, the 304 stainless steel plate to increase manufacturing process characteristics, weld microstructure and performance characteristics, of 304 stainless steel material increase manufacturing forming and welding of the related research。 Finally, the appropriate welding parameters are obtained。 Through the experiment, when the wire feeding speed is 3。5mm/s, the welding current is 125A, the welding voltage is 14。8V and the welding speed is 10cm/min, the welding result is good。 This single pass welding weld hardness is slightly higher than that of the base metal, but lower than that of the heat affected zone, single channel multilayer welding interlayer binding region of hardness, with an average of 175hv and below the requirement of layer between the fusion zone, higher than that of the base metal hardness, the average value for 172HV。 The maximum tensile strength of the weld transverse 515MPa。

Keywords  arc increasing material  304 stainless steel  welding technology   performance

目   次

1  绪论 1

1。1  选题背景及意义 1From+优·尔*论^文W网wWw.YouErw.com 加QQ752018.766

1。2  增材制造技术研究现状 1

1。2。1  激光增材制造技术 2

1。2。2  电弧增材制造技术 2

1。2。3  电子束增材制造技术 3

1。2。4  固相增材制造技术 5

1。3  不锈钢材料及其焊接性 6

1。4  主要研究内容 6

2  实验设备及实验方法 8

2。1  实验设备 8

2。2  实验方法 9

2。2。1  实验材料