316H不锈钢表面等离子粉末堆焊Tribaloy®T400涂层的性能研究  

Study on the Properties of Tribaloy® T400 Coating on 316H Stainless Steel Surface by Plasma Powder Welding

作　　者：任森 叶祥熙[2,3] 蒋力 梁建平[2,3] 李志军[2,3] 陈泽中[1] 戴志敏[2,3] REN Sen;YE Xiangxi;JIANG Li;LIANG Jianping;LI Zhijun;CHEN Zezhong;DAI Zhimin(School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Institute of Applied Physics,Chinese Academy of Sciences,Shanghai 201800,China;Dalian National Laboratory for Clean Energy,Dalian 116023,China)

机构地区：[1]上海理工大学材料科学与工程学院,上海200093 [2]中国科学院上海应用物理研究所,上海201800 [3]中国科学院洁净能源创新研究院,大连116023

出　　处：《有色金属材料与工程》2021年第1期31-38,共8页Nonferrous Metal Materials and Engineering

基　　金：中科院A类战略性先导科技专项“变革性洁净能源关键技术与示范”资助项目(XDA 21080100);国家重点研发计划项目(2016YFB0700404);宁波市“创新2025”重大专项(2019B10084);中国科学院青年创新促进会基金项目(2020260);上海市基金面上项目(19ZR1468200和18ZR1448000)。

摘　　要：采用等离子粉末堆焊工艺在316H不锈钢表面堆焊Tribaloy®T400(T400)合金涂层,研究焊接时不同焊接热输入对堆焊件表面形貌、成分、维氏硬度、摩擦因数以及磨损质量的影响。结果表明:当焊接热输入为840 J/mm时,堆焊件表面没有明显的缺陷,维氏硬度以及耐磨性能达到最佳,且Cr元素含量最低;对316H不锈钢和堆焊件的磨损机制进行研究发现,316H不锈钢的磨损机制主要为剥层磨损,伴随有少量氧化磨损,堆焊件的磨损机制主要为磨粒磨损,伴随有黏着磨损。对焊接热输入为840 J/mm的堆焊件在700℃的环境中进行时效实验,堆焊件的维氏硬度随着时效时间的延长而增大,堆焊件经1000 h时效后,维氏硬度由原来的528增加到602,堆焊层具有较高的高温力学稳定性。Tribaloy®T400(T400)alloy coating were prepared by plasma powder welding method on the 316H stainless steel surface.The effects of different welding heat inputs on the surface morphology,composition,Vichers hardness,friction coefficient,and wear mass loss of the cladding specimens were studied.The results show that when the welding heat-input is 840 J/mm,there is no visible defect on the surface of the cladding specimens,the Vichers hardness and wear resistance are the best,and the Cr content is the lowest.The wear mechanism of 316H stainless steel is mainly delamination wear,accompanied by a small amount of oxidation wear.The wear mechanism of the cladding specimens is mainly abrasive wear,accompanied by adhesive wear.The Vichers hardness of the cladding specimens is increased with the increase of aging time.After aging for 1000 h,the Vichers hardness of the cladding specimens is increased from 528 to 602,and the cladding layer shows high mechanical stability at high temperature.

关 键 词：等离子粉末堆焊 焊接热输入 维氏硬度 高温时效 摩擦磨损 

分 类 号：TG455[金属学及工艺—焊接]