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三十年代后半期,苏联为了改进铸造工艺,发展了一种叫做液态模锻的少无功屑压力加工方法。近十年来,世界上许多国家争相研制,使之进入了实用化阶段,日本的依齐米公司改进了这一加工方法,并应用于生产铝合金活塞,与此同时,还开发了一种新型的复合材料MMC（金属基复合材料）,这种复合材料有较好的强度,耐热性,耐摩损等特点,从而,为提高活塞的各项技术指标开辟了一条新路子。
In the latter half of the 1930s, in order to improve the casting process, the Soviet Union developed a less reactive crumb press process called liquid forging. In the past ten years, many countries in the world competed for development and made it into a practical stage. In Japan, Yizumi Corporation improved this processing method and applied it to the production of aluminum alloy pistons, meanwhile, developed a New composite MMC (metal matrix composites), the composite material has good strength, heat resistance, abrasion resistance and other characteristics, thus, to improve the various technical indicators of the piston has opened up a new path.