钢基NiMoCrFeCo-WC涂层螺杆承载应力-扭矩的有限元分析  

Finite Element Analysis of Bearing Stress-Torque of Steel-Base NiMoCrFeCo-WC Coated Screw

作　　者：巴雅尔 沈承金[1] 吉喆[1] 陆柯龙 Ba Yaer;Shen Chengjin;Ji Zhe;Lu Kelong(School of Materials and Physics,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]中国矿业大学材料与物理学院,江苏徐州221116

出　　处：《稀有金属材料与工程》2022年第1期166-173,共8页Rare Metal Materials and Engineering

基　　金：江苏省重点研发计划(BE2018061)。

摘　　要：为研究高强度塑料注射成型过程中碳化钨陶瓷涂层螺杆的承载规律,采用ANSYS有限元模拟计算不同螺棱结构的碳化钨涂层螺杆承载特征,分析钢基材对三段式碳化钨涂层螺杆承载的影响规律,模拟碳化钨涂层螺杆在扭矩载荷作用下的应力/应变变化规律,讨论碳化钨涂层螺杆的承载扭矩与最大应力和最大应变的对应关系,建立碳化钨涂层螺杆临界扭矩的判定方法。结果表明:螺杆底径最小位置的基材和碳化钨涂层均承载最大应力和最大应变,在相同加载扭矩条件下,螺杆底径越小,其承载应力和承载应变越大;分别建立由碳化钨涂层断裂强度/延伸率模拟计算碳化钨涂层螺杆临界扭矩的方法、由材料弹性模量和屈服强度模拟计算未知钢基材碳化钨涂层螺杆临界扭矩的方法,经验证2种方法计算结果基本一致;在此基础上模拟计算Cr12Mo1V1、9Cr18MoV、CPM420V钢基材/NiMoCrFeCo-WC涂层螺杆的临界扭矩分别为330.34、346.87、363.59 N·m。In order to study the load-bearing law of tungsten carbide ceramic-coated screws in the process of high-strength plastic injection molding,ANSYS finite element simulation was used to calculate the load-bearing characteristics of tungsten carbide-coated screws with different screw ridge structures,and the influence law of steel base material on load of the three-section tungsten carbide coating screw was analyzed.The stress/strain change law of tungsten carbide coated screw under torque load was simulated.The corresponding relationship between the load torque of tungsten carbide coated screw and the maximum stress and maximum strain was discussed.The method for determining the critical torque of tungsten carbide coated screw was established.The results show that the base material and the tungsten carbide coating at the smallest position of the screw bottom diameter bear the maximum stress and the maximum strain.Under the same loading torque condition,the smaller the screw bottom diameter,the greater the bearing stress and strain.Based on tungsten carbide coating fracture strength/elongation,the simulation calculation method of critical torque of tungsten carbide coating screw,and simulation calculation method of critical torque of tungsten carbide coating screw of unknown steel substrate based on material elastic modulus and yield strength were established.The calculation results of the two methods are basically verified consistent.On this basis,the critical torques of the Cr12Mo1V1,9Cr18MoV,and CPM420V steel base/NiMoCrFeCo-WC coated screws are simulated to be 330.34,346.87,and 363.59 N·m,respectively.

关 键 词：碳化钨陶瓷涂层螺杆 NiMoCrFeCo-WC涂层 有限元模拟 

分 类 号：TG174.44[金属学及工艺—金属表面处理]