TC21钛合金电子束焊缝精细组织及其对硬度的影响
发布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新时间：2016-01-26
对TC21钛合金进行电子束焊接试验，通过光学显微镜和透射电子显微镜(TEM)对焊缝内不同特征区域的精细显微组织进行分析，并对各个区域的显微硬度进行测量。
TC21钛合金电子束焊缝精细组织及其对硬度的影响Fine microstructure and its effect on hardness of electron beam welding joint of TC21 Ti alloy对TC21钛合金进行电子束焊接试验，通过光学显微镜和透射电子显微镜(TEM)对焊缝内不同特征区域的精细显微组织进行分析，并对各个区域的显微硬度进行测量。结果表明：TC21钛合金在焊接过程中，焊缝区和热影响区Ⅰ、Ⅱ区内发生了马氏体转变，由针状马氏体α′相和残余β相组成。热影响Ⅲ区只发生了α相向β相的转变。马氏体转变量与接头不同区域的降温速率有关，焊缝区内马氏体数量最大，尺寸最大，马氏体强化效果最明显，显微硬度最高。而在热影响Ⅲ区内无马氏体强化效果，且β相数量增多，硬度低于母材的，发生软化。
The electron beam welding of TC21 titanium alloy was carried out. The fine microstructure in various feature regions of weld was analyzed by optical microscopy and transmission electron microscopy. As well, the microhardness of each region was measured. The results show that martensitic transformation occurs in weld zone and heat affected zone I and II which are characterized by acicular martensite α′ phase and retained β phase. The transformation of α to β phase is the only phase change process in heat affected zone Ⅲ. The extent of martensitic transformation is relevant to cooling rate in various region of the joint. The microhardness in weld zone is the highest for martensitic strengthening because there is the largest number of martensite with the biggest size in it. But the material in heat affected zone Ⅲ softened during welding with the increase of β phase and lack of martensitic strengthening effect.
作为值得信赖的合作伙伴和高品质金属合金的半成品供应商，艾荔艾拥有完善的服务体系和专业的团队。在同客户交易的过程中，我们力求根据不同的应用需求将我们的产品做到精益求精。针对当前和未来的市场需求，艾荔艾致力于为客户提供最佳的金属材料解决方案。
AILIAI has been a reliable partner and supplier of sophisticated and high-quality semi-finished products maed of alloys. In dialogue with our customers, we optimise our products to meet the specific application requirements. AILIAI develops the best alloy material solutions for current and future challenges.
获取更多我们供应的合金和服务信息，请致电086-021-67660801或发电子邮件kefu@ailiaigroup.com联系我们，您也可以通过微博，微信，领英和推特与我们互动。
For more information on the alloys and services that we supply, call us at 086-021-67660801 or email us at kefu@ailiaigroup.com. You can also get in touch on social media, we are constantly active on Weibo, Weixin, LinkedIn and Twitter.