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目前,国外发动机挺柱应用激冷铸铁的甚多,国产发动机挺柱大多数是用钢材的。定海汽车配件厂对难度比较大的北京牌BJ212汽油发动机的汽门挺柱(以下简称挺柱),做了探讨性的研制生产。并在北京内燃机厂,(以下简称“北内”)的帮助指导下,于85年7月份投入批量生产,同年10月份通过了科研成果鉴定。为共同探讨激冷铸铁挺柱的工艺、金相组织等,现把我们研试生产的情况介绍如下。
At present, foreign engine tappet application chilled cast iron is very much, most of the domestic engine tappets are made of steel. Dinghai Auto Parts Factory on the more difficult Beijing BJ212 gasoline engine valve tappet (hereinafter referred to as tappet), made a exploratory research and development. Under the guidance of the help of Beijing Internal Combustion Engine Plant (hereinafter referred to as “Bei-Nei”), it was put into mass production in July, 85 and passed the scientific research appraisal in October of the same year. In order to discuss the chilled cast iron tappet technology, microstructure, etc., now we study the production of the situation are described below.