有色金属科学与工程2026，Vol.17Issue(4)：506-514,629,10.DOI:10.13264/j.cnki.ysjskx.2026.04.003
稀土Y对Cr12MoV冷作模具钢碳化物及力学性能的影响
Influence of rare earth Y on carbides and mechanical properties in annealed Cr12MoV cold work tool steel
摘要
Abstract
This study investigated the effects of rare earth Y addition on the carbide morphology,distribution,and mechanical properties of Cr12MoV cold work die steel using optical microscopy(OM),scanning electron microscopy(SEM),electron probe microanalysis(EPMA),and transmission electron microscopy(TEM).The results showed that the addition of rare earth Y significantly refined the network structure of as-cast eutectic carbides(M7C3)and inhibited secondary dendrite growth.After forging,the carbide distribution became more uniform.Following spheroidizing annealing,Y promoted the spheroidization of M7C3 carbides and increased the quantity of M23C6 carbides by 34%.Mechanical property tests indicated that after Y modification,the annealed hardness of the Cr12MoV steel increased by 1.5 HRC,while tensile strength,yield strength,and elongation were improved by 43.2 MPa,80.2 MPa,and 1.7%,respectively,demonstrating enhanced strength without sacrificing toughness.Fracture analysis revealed a significant increase in the number of dimples,further confirming that rare earth Y effectively improved the material's strength and toughness.关键词
稀土Y/Cr12MoV模具钢/碳化物/力学性能Key words
rare earth Y/Cr12MoV tool steel/carbide/mechanical properties分类
矿业与冶金引用本文复制引用
熊雨康,汪志刚,刘羽翔,刘中国..稀土Y对Cr12MoV冷作模具钢碳化物及力学性能的影响[J].有色金属科学与工程,2026,17(4):506-514,629,10.基金项目
国家自然科学基金资助项目(5216010077) （5216010077）
