变形量对粉末冶金零件表面致密化的研究
Study of extrusion volume on surface densification of powder metallurgical parts
黄贤 1罗成 1王天国 1华建杰 2张晓东 2张明辉2
作者信息
- 1. 湖北汽车工业学院材料科学与工程学院,湖北十堰 442002
- 2. 东风汽车零部件(集团)有限公司东风粉末冶金公司,湖北十堰 442700
- 折叠
摘要
采用整形致密化技术,研究了变形量对粉末冶金Fe-Cu-Mn-Mo-C材料表面致密化层深度的影响.实验通过增加变形量来减小零件表面的孔隙,提高其表面致密层深度与硬度等性能.结果表明,采用挤压致密化技术制备的粉末冶金零件表面可以形成均匀的致密层,零件的表面硬度有较大的提高.当完成变形量提高到0.4 mm和0.6 mm后,在试样密度6.8 g/cm3与7.0 g/cm3的粉末冶金零件表面形成大约0.25～0.4 mm致密层.表面致密层深度和硬度均随变形量的增加而增加,说明了变形量是影响零件表面致密化效果的重要因素之一.
Abstract
The effect of deformation on the depth of the surface densification layer of powder metallurgical Fe-Cu-Mn-Mo-C materials was investigated using plastic densification techniques.By increasing the amount of deforma-tion,the pores on the surface of the parts were reduced and the surface densification depth and hardness were im-proved.The experimental results show that the surface of the powder metallurgy parts prepared by extrusion densi-fication technique can form a uniform densification layer and the surface hardness of the parts can be improved.When the finished deformation is increased to 0.4 mm and 0.6 mm,a dense layer of about 0.25-0.4 mm is formed on the surface of the powder metallurgical parts with a specimen density of 6.8 and 7.0 g/cm3.The depth and hard-ness of the surface dense layer increase with the amount of deformation,indicating that the amount of deformation is one of the most important factors influencing the surface densification effect of the parts.
关键词
整形/表面致密化/表面硬度/致密层/粉末冶金零件Key words
rectification/surface densification/surface hardness/densified layer/powder metallurgical part引用本文复制引用
基金项目
湖北省高等学校优秀中青年科技创新团队计划资助项目(T201811)
出版年
2024
NETL
NSTL
万方数据