球料比对S290粉末高速钢制备、组织和性能的影响
Influence of ball-to-powder ratio on the preparation,microstructure and properties of S290 powder high speed steel
喻浩然 1贾寓真 2李栋梁 3张权 3欧阳志勇 3陈刚4
作者信息
- 1. 湖南泰嘉智能科技有限公司,湖南长沙 410200;湖南泰嘉新材料科技股份有限公司,湖南省高速高效双金属锯切工程技术研究中心,湖南长沙 410200
- 2. 湖南泰嘉新材料科技股份有限公司,湖南省高速高效双金属锯切工程技术研究中心,湖南长沙 410200;湖南科技大学,难加工材料高效精密加工湖南省重点实验室,湖南湘潭 411201
- 3. 湖南泰嘉新材料科技股份有限公司,湖南省高速高效双金属锯切工程技术研究中心,湖南长沙 410200
- 4. 湖南大学材料科学与工程学院,湖南长沙 410082
- 折叠
摘要
以WC、Mo2C、Cr3C2、VC、Co和Fe粉为原料,通过机械球磨将粉末混合并压制成形,然后在1 170～1 230 ℃真空烧结制备S290粉末高速钢.研究了不同球料比对S290粉末高速钢制备、组织和性能的影响.结果表明:球磨后,混合粉末呈薄片状,随着球料比的增大,粉末之间出现粘连又再次被破碎.烧结温度为1 200 ℃时,不同球料比球磨的粉末均能形成致密的高速钢.球料比越高的粉末,烧结温度窗口越宽,但烧结前后的收缩更为明显.球料比也会影响烧结后高速钢组织中碳化物的尺寸和分布,碳化物分散均匀可有效提高烧结及热处理后的硬度和性能稳定性,1 200 ℃烧结时,球料比为4∶1的粉末高速钢烧结和热处理后的硬度表现最优,其硬度分别为44HRC和66.13HRC.
Abstract
S290 high speed steel powder was prepared by mixing and compacting powders of WC,Mo2C,Cr3C2,VC,Co,and Fe and then vacuum sintering at 1 170-1 230 ℃. The effect of different ball-to-powder ratios on the preparation,organization and performance of S290 powder high speed steel was studied. The results show that after ball milling,the mixed powder become thin and flaky. As the ball-to-powder ratio increases,the powder become more cohesive and is subsequently broken again. At 1 200 ℃,powder with different ball-to-powder ra-tios can form dense high speed steel. With higher ball-to-powder ratio,the sintering temperature window is wider,but the shrinkage before and after sintering are more significant. The ball-to-powder ratio can also affect the size and distribution of carbides in the sintered of high speed steel microstructure. Uniform dispersion of carbides can effectively improve the hardness and performance stability after sintering and heat treatment. After sintered at 1 200 ℃,the powder high speed steel with a ball-to-powder ratio of 4∶1 shows the best hardness performance after sintering and heat treatment,with hardness values of 44HRC and 66.13HRC,respectively.
关键词
球料比/球磨/粉末高速钢/烧结/热处理Key words
ball-to-powder ratio/ball-milling/powder high speed steel/sintering/heat treatment引用本文复制引用
基金项目
湖南省高新技术产业科技创新引领计划资助项目(2022GK4049)
湖南省科技创新计划资助项目(2022RC1050)
出版年
2024
NETL
NSTL
万方数据