Invar合金激光-MIG復(fù)合多層焊接焊縫形貌及顯微組織
發(fā)布人：上海艾荔艾合金股份有限公司www.shailiai.cn
更新時(shí)間：2016-06-03
借助激光-MIG復(fù)合焊技術(shù)，采用Invar M93焊絲對(duì)厚度為19.05 mm的Invar合金板材進(jìn)行多層對(duì)接焊實(shí)驗(yàn)。分析了工藝參數(shù)對(duì)焊縫熔深、熔寬及深寬比等宏觀形貌參數(shù)的影響，并研究Invar合金復(fù)合焊接頭不同區(qū)域的顯微組織特點(diǎn)及形成原因。
Invar合金激光-MIG復(fù)合多層焊接焊縫形貌及顯微組織Weld appearance and microstructure of Invar alloys hybrid multi-layer welded joints using laser-MIG借助激光-MIG復(fù)合焊技術(shù)，采用Invar M93焊絲對(duì)厚度為19.05 mm的Invar合金板材進(jìn)行多層對(duì)接焊實(shí)驗(yàn)。分析了工藝參數(shù)對(duì)焊縫熔深、熔寬及深寬比等宏觀形貌參數(shù)的影響，并研究Invar合金復(fù)合焊接頭不同區(qū)域的顯微組織特點(diǎn)及形成原因。結(jié)果表明:從打底層到蓋面層焊縫的平均深寬比由2.6減小到0.86，熱影響區(qū)寬度明顯增加，焊縫形貌由釘頭狀轉(zhuǎn)變?yōu)楦吣_杯狀。焊縫中心區(qū)域形成縱向分布的狹長(zhǎng)奧氏體柱狀樹枝晶，兩側(cè)為斜向生長(zhǎng)的奧氏體胞狀樹枝晶。從打底層到蓋面層，焊縫中不同區(qū)域的晶粒度均逐漸增大。另外，相鄰焊縫邊界亦存在熱影響區(qū)，出現(xiàn)聯(lián)生結(jié)晶現(xiàn)象。
Invar alloy plates with thickness of 19.05 mm were welded with Invar M93 filler wire by laser-MIG hybrid welding. The effects of welding parameters on weld appearance including beam penetration, weld witch and depth-to-witch ratio were analyzed. The features and the forming mechanism of the microstructure on different regions of the weld were investigated. The results show that the weld depth-to-witch ratio gradually decreases from 2.6 to 0.86 in average and the witch of HAZ obviously increases from back weld to cover weld, leading to the weld appearance changing from nail-head shape to goblet shape. Narrow Austentic columnar dendrite crystals in longitudinal direction and oblique diagonal cellular dendrite crystal are formed in weld center and off-centered area, respectively. The grain size in different regions of the weld increases layer-by-layer. In addition, HAZ is also found at the boundary of adjacent weld layers, where appears epitaxial solidification.
作為值得信賴的合作伙伴和高品質(zhì)金屬合金的半成品供應(yīng)商，艾荔艾擁有完善的服務(wù)體系和專業(yè)的團(tuán)隊(duì)。在同客戶交易的過程中，我們力求根據(jù)不同的應(yīng)用需求將我們的產(chǎn)品做到精益求精。針對(duì)當(dāng)前和未來的市場(chǎng)需求，艾荔艾致力于為客戶提供最佳的金屬材料解決方案。
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.
獲取更多我們供應(yīng)的合金和服務(wù)信息，請(qǐng)致電086-021-67660801或發(fā)電子郵件[email protected]聯(lián)系我們，您也可以通過微博，微信，領(lǐng)英，XING，臉書和推特與我們互動(dòng)。
For
more information on the alloys and services that we supply,?call
us?at
086-021-67660801 or email us at [email protected]. You can also get in touch
on social media, we are constantly active on?Weibo,?Weixin,?LinkedIn,?XING, Facebook?and?Twitter.