7CrSiMnMoV钢表面渗钒及基体强韧化复合热处理的组织和性能  

The Structures and Properties of Surface Vanadizing and Base Strengthening and Toughening Compound Heat Trectment of Steel 7CrSiMnMoV

作　　者：刘智勇[1] 彭日升[1] 刘杰[1] 朱穗东 

机构地区：[1]天津大学机电分校

出　　处：《热加工工艺》1989年第6期24-28,共5页Hot Working Technology

摘　　要：本文研究了7CrSiMnMoV钢渗钒及几种基体强韧化处理工艺的组织和性能。研究表明,渗钒后,表面硬度达Hv_(0.1)2820～3010,碳化钒层深度为7～9μm,耐磨性比常规热处理提高10倍以上。渗钒后经二次循环处理,使墓体碳化物和晶粒双细化,这不仅使表面具有高硬度高耐磨性,而且其整体宏观机械性能与常规处理相近,基体断裂韧性提高33%。The structures and properties of vanadizing and some base streng hening and toughening processes of steel 7CrSiMnMoV were studied. The results Showed that after vanadizing the surface hardness reached Hv_(0.1)2820～3010, the case depth reached 7～9μm. The wearability of vanadizing samples has increased by over ten times as compared with that of the conventional process. After vanadizing the double circular heat treatments are put into operation, base carbides and crystal grains are fined, so that high hardness and high wearability are obtained on the surface of the samples and macroscopic machanical properties of the samples are much the same as compared with that of the conventional process. The base fracture toughness is increased 33%.

关 键 词：7CrSiMoV钢 渗钒 强韧化 基体 

分 类 号：TG161.8[金属学及工艺—热处理]