304不锈钢激光熔覆CoCrW凝固过程数值模拟研究  

Numerical Simulation Research on Solidification Process of CoCrW Laser Cladding on 304 Stainless Steel

作　　者：张芸 祁文军[1] 李志勤 ZHANG Yun;QI Wenjun;LI Zhiqin(School of Mechanical Engineering,Xinjiang University,Urumqi 830047,China;Xinjiang Uygur Autonomous Region Office of Defense Science,Technology and Industry,Urumqi 830000,China)

机构地区：[1]新疆大学机械工程学院,新疆乌鲁木齐830047 [2]新疆维吾尔自治区国防科学技术工业办公室,新疆乌鲁木齐830000

出　　处：《热加工工艺》2023年第10期101-106,共6页Hot Working Technology

基　　金：自治区高校科研计划自然科学重点项目(XJEDU2020I007)。

摘　　要：为了获得性能良好的熔覆层表面,对激光熔覆过程的温度场特性及冷却演化过程进行研究,进一步对熔覆层凝固过程中金相组织形态进行探讨。根据激光熔覆特点,建立了激光熔覆温度场有限元分析模型,通过ANSYS参数化设计语言(APDL)和单元生死法编程,实现熔覆层的同步送粉以及其瞬态温度场特性的求解,获得了单道单层熔覆及冷却过程的温度分布规律。针对熔覆层的热量变化规律分析其组织演变过程。模拟计算出形状控制因子K,对304不锈钢表面熔覆CoCrW材料的凝固组织特征进行辅助分析,建立了相组成及组织特征与形状控制因子K的关系模型。In order to obtain a good surface of the cladding layer,the temperature field characteristics were researched and the evolution process of the laser cladding process with the metallographic structure during the solidification process of the cladding layer was further discussed.Based on the laser cladding experiment,the finite element analysis model was established,through which the simultaneous powder feeding of the cladding layer and the solution of its transient temperature field characteristics were achieved by ANSYS parametric design language(APDL)and unit life and death programming,and a single-pass single layer was obtained.The temperature distribution law of the cladding process and the cooling process of the single-pass single layer was obtained.According to the heat change law of the cladding layer,the structure evolution process was analyzed.The shape control factor K was simulated and calculated to assist in the analysis of the structure characteristics of 304 stainless steel cladding CoCrW material,and the relationship model between the phase composition,structure characteristics and the shape control factor K was established.

关 键 词：激光熔覆 有限元 温度场特性 组织 形状控制因子 

分 类 号：TG174.4[金属学及工艺—金属表面处理]