基于JMatPro软件TIG堆焊层Co-8.8Al-9.8W-0.2B合金的相组成及开裂行为  

Phase Composition and Cracking Behavior on TIG Cladding Layer of Co-8.8Al-9.8W-0.2B Superalloy Based on JMatPro Software

作　　者：徐仰涛[1,2] 夏荣里 沙岐振 夏天东[1,2] Xu Yangtao Xia Rongli Sha Qizhen Xia Tiandong(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China)

机构地区：[1]兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2017年第9期2459-2464,共6页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51561019);甘肃省自然科学基金(1308RJYA022)

摘　　要：Co-Al-W合金是一种由γ′-Co3(Al,W)相沉淀强化的新型钴基高温合金,为了研究含硼合金在不锈钢基体上TIG堆焊层的开裂行为,通过JMat Pro热力学模拟计算软件,对堆焊层Co-8.8Al-9.8W-0.2B合金不同部位析出相的类型、含量进行了模拟计算和实验验证。研究发现,堆焊层0.2B合金不同位置相组成相同,但含量不同。根据对堆焊层合金相组成和含量的分析,堆焊层表面出现的裂纹主要为热裂纹,裂纹的形成是热应力、相变应力以及Laves相综合作用的结果。Co-Al-W superalloy is a novel cobalt-based superalloy with the precipitation strengthening phase of ternary compound γ′-Co3（Al,W）. In order to study the cracking behavior of Co-8.8Al-9.8W-0.2B cladding layer on 304 stainless steel with TIG welding,the phase composition and relative contents at different positions of the cladding layer were investigated by thermodynamic simulation calculation of JMat Pro software and experimental verification. The results show that the phase composition is the same at different positions of the cladding layer,but the content of those phases are not alike. Combining phase composition and contents of the cladding layer,the surface cracks of cladding layer are mainly hot cracks,which come from the integrated effect of the thermal stress,the phase transformation stress and the Laves phase.

关 键 词：CO-AL-W合金 热裂纹 JMat PRO软件 LAVES相 

分 类 号：TG132.3[一般工业技术—材料科学与工程]