Abstract: The  effect  of  1200  ℃ heat treatment  and 40%～60% hot  deformation  at  1050~950℃ on  diameters  and volume  fraction  of carbide  in  3 mm  cast-strip  of high  speed  steel M2(W6Mo5Cr4V2)using  Gleeble  1500D  auto thermo- simulation machine have been studied by quantitative metallographic examination. The studied results showed that the car bide size in steel M2 was fined and distribution of carbide was improved in cast-strip by high temperature heat treatment and hot  deformation,and  1200  ℃ 40 min heat treatment  +  50% hot  deformation was  available to  get  fine  carbide(0.96  μm) and homogeneous distribution.

Key words: M2 High Speed Steel,Twin-Roll Casting Strip,Heat Treatment,Hot Deformation,Carbide

摘要： 用定量金相法研究了Gleeble1500D自动热模拟机1200℃热处理和1050～950℃40%～60%热变形对3mmM2(W6Mo5Cr4V2)高速钢铸带中碳化物直径,体积分数的影响。研究结果表明,高温热处理和热变形可细化M2钢铸带中的碳化物尺寸,改善碳化物分布;1200℃40min热处理+50%热变形可得到较细的碳化物(0.96μm)和均匀的分布。

关键词: M2高速钢, 双辊薄带连铸, 热处理, 热变形, 碳化物