高密度铁基粉末冶金零件制备技术

Preparation processes of high density iron-based powder metallurgy parts

介绍了东睦新材料集团股份有限公司已经使用的高密度铁基粉末冶金产品制造技术,包括温压成形、温模压制、复压复烧等,并讨论了这些技术的优缺点。所述高密度铁基粉末冶金零件制备技术虽可以提升粉末冶金零件的密度,强度也达到较高的水平,但是零件的精度及粗糙度等尚不能满足高端应用的要求,仍需进一步机加工。未来仍需提升粉末冶金模具的制造精度、粉末特性和工艺稳定性,开发低成本、高精度、高强度的烧结铁基零件制备技术。

The preparation technologies of high density iron based powder metallurgy products used in NBTM were introduced in this paper,including warm compaction,warm die compaction,double-pressing and double-sintering,and the advantages and disadvantages of these technologies were discussed.Although the preparation technologies described in this paper can improve the density and strength of powder metallurgy parts to a high level,the precision and roughness of the parts cannot meet the requirements of high-level applications,and the further machining is still needed.For the iron-based powder metallurgy parts,the precision of powder metallurgy die manufacturing,the powder characteristics,and the process stability are still needed to improve in the future,and the new sintered iron based parts preparation technology with low-cost,high-precision,and high-strength should be developed.