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由江苏泰县粉末冶金密封件厂和北京粉末冶金研究所、北京第一通用机械厂联合研制的往复活塞式压缩机铁基粉末冶金平面填料（于1981年12月通过部级技术鉴定）,在江苏泰县粉末冶金密封件厂投入大批量生产。 1.填料主要技术指标 （1）金相组织为珠光体加铁素体并均匀分布,珠光体含量不少于30％,并有较多的硫化物、游离石墨和孔隙,游离渗碳体含量不大于5％。
From the Jiangsu Taixian powder metallurgy Sealing Factory and Beijing Institute of Powder Metallurgy, Beijing First General Machinery Plant jointly developed reciprocating piston compressor iron-based powder metallurgy plane filler (in December 1981 through ministerial technical appraisal), in the Jiangsu Taixian powder metallurgy seal factory put into mass production. 1. The main technical index of filler (1) The microstructure is pearlite plus ferrite with uniform distribution. The content of pearlite is not less than 30%, and there are more sulfides, free graphite and pores. The content of free cementite Not more than 5%.