摘要本文主要开展了摩擦螺柱焊接工装夹具的设计、45 钢螺柱与柱状螺柱对接工 艺试验研究及 45 钢螺柱与板状母材结构工艺试验研究。设计并通过优化设计实现 了一套夹具满足多种不同直径螺柱的焊接要求，设计了既能满足柱状母材，又能 满足板状母材的工装夹具。68487

开展了 45 钢小直径螺柱与模拟板材、板状 45 钢母材摩擦螺柱焊工艺试验。 研究了摩擦时间、摩擦压力、工件进给速度对焊接质量成型的影响。研究了焊接 工艺参数与接头力学性能、微观组织的关系，焊缝接头典型组织主要为针状马氏 体。拉伸试验中拉断位置、塑性变形和颈缩均处于母材上，且有多组试样的拉伸 强度高于母材的抗拉强度 600 Mpa，表明正交试验所给出的焊接工艺范围能保证 接头达到可靠的焊接强度。

毕业论文关键词 摩擦焊，螺柱焊，工装夹具，力学性能，微观组织

Title Research on the multiple sources friction stud welding by   steel stud - steel structure.

Abstract

Carried out the design of the Friction stud welding jig, the process test research of 45 steel stud with columnar stud docking and 45 steel stud with Tabular material structure. Design a set of frock clamp which meet with the size of the stud, and by optimizing the design and implementation of a set of fixtures to meet a variety of different diameter stud welding requirements. Design a set of fixtures can not only satisfy the columnar parent metal, and can satisfy the Tabular material.

To carry out the process test of Friction stud welding on 45 steel stud and Simulated plate , 45 steel stud with Tabular material. To study the influence of friction time, friction pressure and feed rate on the welding quality of work piece forming. Studied the relationship between welding parameters, joint mechanical properties and microstructure, analyze the microscopic microstructure of welded joints. The typical weld organization are mainly acicular martensite. The joint welding process parameters given by the test can guarantee to achieve reliable welding strength, because the pull off location, plastic deformation and neck all on the parent metal in the tensile test, and there are many groups of tensile strength of the specimen is higher than  the parent metal of 600 Mpa.

Key words friction  welding,  stud  welding,  frock  clamp,  mechanical    properties, microstructure

目 次 I

1 绪论 1

1.1 课题研究背景 1

1.2 摩擦螺柱焊原理及特点 1

1.2.1 螺柱焊原理 1

1.2.2 摩擦螺柱焊原理及分类 2

1.2.3 摩擦螺柱焊特点[18] 4

1.3 摩擦焊技术的国内外发展与应用现状 5

1.4 课题的主要研究内容 6

2 摩擦螺柱焊试验条件与工艺方案设计