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1、I钛制换热器板对接焊接工艺研究摘 要钛及其合金广泛应用于多种领域，如航空航天、汽车、化工及生物医学等产业。由于钛材自身的优良性能，已经被广泛的应用在压力容器制造领域中。但是钛作为有色金属，与常用的压力容器制造材料的焊接过程有所不同，所以应对钛材的焊接工艺过程进行研究。在工厂生产制造中，对工件焊接工艺的制定是一项基本工作，是对接下来实际产品生产的标准与指导，所以研究焊接工艺制定过程对即将工作的大学生是十分重要的。本篇文章以钛制换热器对接焊缝的焊接工艺为生产实例，进行焊接工艺的制定研究。在焊接工艺制定前应了解焊接材料性能，分析钛板的化学成分，物理性能，力学性能，焊接性。通过查阅焊接手册、国标等相关
2、标准，制定初始焊接工艺。根据板材的厚度，热输入量，线能量等参数来制备合适的坡口尺寸。最终得出焊接工艺为电流直流正接，焊接电流为 90A-115A，焊接电压为 10V-13V，焊接速度为 70mm/min，喷嘴直径为 8mm，正面氩气保护气体流量为 15L/min，背面氩气保护气体流量为 10L/min。本文的研究对压力容器的制造具有指导意义。关键词：钛，换热器，焊接工艺IIResearch on the welding process of Titanium plateheat exchangerAbstractTitanium and its alloys are widely used i
3、n a variety of application in aerospace,automotive,chemical and biomedical sciences. Due to the excellent properties of Titanium material itself,it has been widely used in pressure vessel manufacture field.But as non-ferrous metal Titanium,the welding process is different between Titanium and common
4、ly used pressure vessel manufacture materials.So deal with Titanium welding process is studied.In factory production and manufacturing, the welding craft of the workpiece is a fundamental work and is the actual cautious guidance and standards of productions.Therefore the welding process is very impo
5、rtant for the graduate.This article is about the examples of Titanium heat exchanger butt-jointed seam welding process,and is about research on the formulation of welding procedure.Before deciding the welding technology,we should know the character of welding materials,such as chemical composition o
6、f Titanium,mechanical properties,physical properties and weldability.By look up welding manual,GB and other related standards,formulate the initial welding process.According to the thickness of the plank,heat input,linear energy and other welding parameter to assure groove size.The finally welding p
7、rocess is as follows.DCSP welding current is 90-115A.Welding voltage is 10-13V.Welding rate is 70mm/min.Nozzle diameter is III8mm.Positive argon protection flowrate is 15L/min.The back argon ptotection flowrate is 10L/min.This article is meaningful to pressure container manufacturing.Keywords: Titan
8、ium, Pressure container , Welding technologyIV目录1 绪绪论论.11.1 前言发展.11.2 本课题的研究意义.22 钛制化钛制化工工设备设备.33 钛材钛材.43.1 钛材概述.43.2 钛材性能.53.2.1 力学性能.53.2.2 物理与化学性能.63.2.3 耐腐蚀性能.63.3 实验材料.73.3.1 TA2 的化学成分.73.3.2 TA2 的力学性能.83.3.3 TA2 的焊接特点.84 焊接工艺焊接工艺.154.1 工艺准备.154.1.1 焊材准备.154.1.2 焊接设备及辅助装置.154.2 工艺实施.16V4.2.1 坡口制备.164.2.2 焊接材料的选择.184.2.3 钨极氩弧焊机.184.2.4 气体保护措施.264.2.5 焊接工艺参数.
