一汽二铸厂为沈阳新光动力机械公司提供的491Q缸体,第一批数百件加工后水压试验表明,这批铸件渗漏率为零,说明生产技术先进,过程稳定。至此,我国目前装备水平最高的现代化大型铸造厂,在高校合作之下,圆满地投产,完成了薄壁高强度灰铸铁生产与控制的课题,1992年2月15在长春通过鉴定。 FAW two casting plant for the Shenyang Xinguang Power Machinery Company 491Q cylinder, the first batch of hundreds of hydroforming tests showed that the leakage rate of these castings is zero, indicating advanced production technology, process stability. At this point, the modern large-scale foundry with the highest equipment level in our country successfully put into operation under the cooperation of colleges and universities and completed the production and control of thin-walled, high-strength gray cast iron. It passed the appraisal in Changchun on February 15, 1992.