發(fā)布時(shí)間：2018-08-01 10:58

【摘要】：為了解決激光自熔焊接時(shí)薄板焊縫易產(chǎn)生負(fù)余高的問(wèn)題及滿(mǎn)足高裝配精度的要求,提出了激光填絲焊接(LWFW)工藝,開(kāi)展了Hastelloy C-276屏蔽套材料的LWFW實(shí)驗(yàn),研究了工藝參數(shù)對(duì)焊縫形貌的影響,分析了接頭不同區(qū)域的顯微組織、元素分布及顯微硬度特征。結(jié)果表明,運(yùn)用LWFW可以獲得上下表面正余高可控的焊接接頭,在優(yōu)化工藝參數(shù)條件下可獲得上下余高、接觸角基本一致的焊縫形貌。焊縫晶粒細(xì)化明顯,母材與熔化線(xiàn)交界處無(wú)明顯熱影響區(qū),焊縫不同熔化區(qū)域元素分布均勻,沒(méi)有明顯的元素宏觀(guān)偏析,但柱狀枝晶區(qū)Mo元素存在顯微偏析。接頭不同熔化區(qū)域顯微硬度分布均勻,硬度值與母材的基本相當(dāng)。
[Abstract]:In order to solve the problem that thin plate weld is liable to produce negative excess in laser welding and meet the requirements of high assembly precision, the laser wire filling welding (LWFW) technology is proposed. The LWFW experiment of Hastelloy C-276 shield material is carried out. The influence of process parameters on the weld morphology is studied, and the microstructure and elements in different regions of the joint are analyzed. The results show that the welding joint with high and lower surface can be obtained by using LWFW, and the weld joints with high and lower surface can be obtained. Under the optimal process parameters, the weld grain can be obtained and the contact angle is basically the same. The grain refinement of the weld is obvious. There is no obvious heat influence zone at the junction of the parent material and the melting line, and the elements of the different melting zone of the weld seam are divided. There is no obvious macro segregation, but the Mo element in the columnar dendrite region exists microsegregation. The microhardness distribution of the joint at different melting regions is uniform, and the hardness value is basically equal to that of the parent material.
【作者單位】： 大連理工大學(xué)精密與特種加工教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家973計(jì)劃(2015CB057305) 創(chuàng)新研究群體科學(xué)基金(51321004) 中央高�；究蒲袠I(yè)務(wù)費(fèi)專(zhuān)項(xiàng)資金[DUT16RC(3)012]
【分類(lèi)號(hào)】：TG456.7

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王金鳳;孫喬;;激光填絲焊接超薄不銹鋼工藝研究[J];熱加工工藝;2014年03期

2 許飛;鞏水利;陳俐;楊t，

本文編號(hào)：2157350