摘要
对模壁润滑温压工艺进行了较为系统的研究,分析了温度、粉末中润滑剂添加量、模壁润滑剂种类及其浓度等对温压效果的影响。结果表明,粉末温度在100℃时温压效果最好;Fe-1.5Cu-0.5C粉末中添入0.2%内润滑剂时效果最好,而Fe-1.5Ni-0.5Mo-0.5Cu-0.5C粉末中最佳润滑剂含量为0.3%;模壁润滑剂A、B分别适合于较低和较高压制压力条件,2种模壁润滑剂均在浓度低时温压效果较好;在686MPa时,Fe-1.5Cu-0.5C和Fe-1.5Ni-0.5Mo-0.5Cu-0.5C粉末分别获得了7.48、7.39g/cm^3的压坯密度;模壁润滑温压工艺较适用于压缩性良好的粉末,对压缩性较差的粉末没有优势;模壁润滑工艺的脱模压力比内润滑工艺小35%～45%,可以减少模具损耗。
In this paper the effects of powder temperature, interior lubricant content and die wall lubricant type on the behavior of die wall lubricated warm compaction were studied. The results show that the optimum powder temperature in our experiment is 100°C The optimum lubricant contents in Fe-1. 5Cu-0. 5C and Fe-1. 5Ni-0. 5Mo-0. 5Cu-0. 5C powders are 0. 2% and 0. 3% respectively. Die wall lubricant A is more effective in the condition of lower compacting pressure while B is more suitable for higher pressure. For Fe-1. 5Cu-0. 5C and Fe-1. 5Ni-0. 5Mo-0. 5Cu-0. 5C powders, the densities of 7. 48 and 7. 39 g/cm^3 can be achieved at 686MPa. Die wall lubricated warm compaction shows its advantage especially for the powder with better compressibility such as Fe-1. 5Cu-0. 5C powders while the Fe-1. 5Ni-0. 5Mo-0. 5Cu-0. 5C powders with worse compressibility is fitter for normal warm compaction; For die wall lubricated warm compaction, the ejecting pressure can be reduced by 35%～45% as compared to normal warm compaction, which is beneficial to reduce the abrasion of mould.
出处
《材料导报》
EI
CAS
CSCD
2004年第10期85-88,102,共5页
Materials Reports
基金
863资助项目(2001AA337010)
关键词
温压工艺
压制压力
润滑剂
模具
时效
粉末
压坯密度
脱模
die wall lubricated warm compaction
powder temperature
lubricant
compacting pressure
ejecting pressure
