粉末冶金技术2025，Vol.43Issue(4)：391-399,406,10.DOI:10.19591/j.cnki.cn11-1974/tf.2025030021
电子束粉末床熔融成形M2高速钢耐腐蚀性能
Corrosion resistance of M2 high-speed steels fabricated by electron beam powder bed fusion
摘要
Abstract
As the high-carbon and high-alloy steels,the M2 high-speed steels(HSS)are widely used in cutting tool applications.Under the extreme conditions(high-speed cutting),the surface of high-speed steels interacts with the coolant in thermal-chemical interaction,leading to the corrosion-wear coupling failure.The M2 high-speed steels were fabricated by electron beam powder bed fusion(EB-PBF)in this paper.The effects of input energy density(VED)on relative density,microstructure,and corrosion behavior were systematically investigated,the comparative analysis was conducted on the corrosion resistance between EB-PBF fabricated and wrought M2 HSS in 3.5%NaCl solution(mass fraction).In the results,the EB-PBF fabricated M2 HSS exhibits the refined grain size(5～8 μm)with homogeneously dispersed carbides(<2 μm)in near-spherical or short rod-like morphologies;notably,the coarse primary carbides commonly observed in wrought M2 HSS are absent.At the optimal VED of 43.3 J·mm-3,the EB-PBF fabricated M2 HSS achieves the peak relative density(99.8%),and the corrosion current density and charge transfer resistance in 3.5%NaCl solution are 71.3%and 123.7%of those of wrought M2 HSS,respectively,demonstrating the significant enhanced corrosion resistance.关键词
电子束粉末床熔融/M2高速钢/相对密度/碳化物/耐腐蚀性能Key words
electron beam powder bed fusion/M2 high-speed steels/relative density/carbide/corrosive properties分类
矿业与冶金引用本文复制引用
魏瑛康,罗甜甜,章文浩,王建勇,刘世锋..电子束粉末床熔融成形M2高速钢耐腐蚀性能[J].粉末冶金技术,2025,43(4):391-399,406,10.基金项目
国家自然科学基金资助项目(52304357,52434009,52304384) （52304357,52434009,52304384）
陕西省教育厅资助项目(23JP082) （23JP082）
