摘要本课题基于机器人等离子弧增材制造工艺技术，以304不锈钢为基板，308L不锈钢焊丝为填充材料的直壁体为研究对象，对增添制造工艺中堆覆电流和堆覆速度对宏观尺寸和力学性能进行了研究。87866
首先进行了堆覆电流和堆覆速度对宏观尺寸影响规律的研究。堆覆速度为 20~70cm/min的范围内变化时，随着堆覆速度的不断增大，直壁体的上表面呈上凸形态，而且堆覆层层宽及层高均下降，层宽从8。74mm下降到4。82mm，而层高则从48mm下降到30mm，堆覆电流在120~140A 时，直壁体的层宽会随电流的增加而增大，而层高则会随着电流的增加而减小，层宽从5。98mm增大到8。74mm，而层高从50mm下降到40mm。显微组织观察结果表明电流和焊接速度越大时晶粒越粗大，拉伸试验结果表明，电流从120A增大到140A是，抗拉强度从507。2MPa增加到515。2MPa。通过对试样的研究得出,抗拉强度随着堆覆速度的增加而递减。
毕业论文关键词 不锈钢 等离子弧 添加制造 尺寸和力学性能
毕业设计说明书外文摘要
Title The forming experiment on wire based additive plasma arc manufacturing with Cr-Ni stainless steel alloy。
Abstract In this experiment which base on wire based additive plasma arc manufacturing,I will research straight wall Weldment which use 308L stainless steel wire as filler and 304 stainless steel as a base material,and the affect on the size and mechanical properties about electric current and speed were studied。源-于,优Y尔-论,文.网wwW.yOueRw.com 原文+QQ752018,766
Firstly,I research the affect on the size and mechanical properties about electric current and speed。Welding speed between 20cm/min and 70cm/min,and the surface in straight wall weldment goes convex shape if welding speed higher and higher,the welding wide and height become less and less,the wide reduce to 4。82mm from 8。74mm,and the height fall to 30mm from 48mm。The wide in straight wall weldment turn higher up to 8。74mm when the electric current between 120A and 140A,but the height turn less,the number is 40mm。Tensile strength increase to 515。2MPa from 507。2MPa when the electric current between 120A to 140A。I discover the weldments have the better tensile strength if the electric current rising or speed reducing。
Keywords stainless steel plasma arc additive manufacturing size and mechanical properties
目 次
1。 绪论 1
1。1 课题背景及意义 1
1。2 金属增材制造技术 1
2。 机器人等离子弧增材制造系统及设备 7
2。1 机器人- 变位机等离子弧增材系统 7
2。2 机器人- 变位机等离子弧增材系统设备 7
2。3 等离子弧金属增材成型系统设备 8
2。4 等离子电弧形式及电弧切换原理 10
2。5 安川机器人编程语言及实验焊接程序 10
3 等离子弧单道往复堆覆成形特性研究 12
3。1 堆覆层的宏观尺寸 17
3。2 堆覆速度对宏观尺寸的影响 17
3。3 堆覆电流对宏观尺寸的影响 18
4 直壁体堆覆件组织及力学性能分析 Cr-Ni合金机器人等离子电弧增材制造成型试验研究:http://www.youerw.com/cailiao/lunwen_148355.html