梁宝乙，杨友坤，赵梓淳，温春岩，刘吉东

华晨宝马汽车有限公司，辽宁 沈阳 110000

摘要：为提升汽车产品的市场竞争力，分析和制订缸体试制工艺，对某款全新设计的 AlSi7MgCu0.5 铸造发动机缸体进行批量化试制，测试缸体的化学成分、金相组织、硬度、变形和机械性能。结果表明：通过强化流程管控、优化加工工艺和严格执行质量检查，试制缸体的化学成分、金相组织、内外部缺陷、热处理变形和机械性能均满足要求；严格的外观检查可以降低报废率和批量制造缺陷，提高铸件的合格率。该试制工艺可以为汽车发动机缸体批量生产提供参考。

关键词：AlSi7MgCu0.5；发动机；缸体；铸造

Abstract：In order to increase the competition of the automobile, the trial production process of cylinder block are analyzed and formulated. A newly designed AlSi7MgCu0.5 material casting engine cylinder block is trial produced in batch.Chemical composition, metallograph, hardness, distortion and mechanical properties are tested. The results show that by strengthening production quality control, optimizing machining process and strictly quality check, a series of severe requirement about chemical composition, metallograph, internal and external defect, distortion and mechanical properties are fulfilled. Strict visual inspection could decrease scrap rate and avoid batch defects, also could improve qualification rate. This trial can provide a reference for vehicle engine cylinder block batch production.

Keywords:AlSi7MgCu0.5; engine; cylinder block; casting