在对１７０型制冷压缩机缸套离心铸造缺陷统计分析的基础上，对其各类缺陷的成因及规律进行了研究，提出了防止缺陷的工艺对策。生产试验表明，采用改进工艺生产的缸套的铸造废品率由原来的１８．７％～２２．５％降低到２．５～３．７％，显微组织与力学性能得到改善，具有明显经济效益 Based on the statistical analysis of the centrifugal casting defects of the 170 refrigerant compressor liner, the causes and rules of various defects were studied, and the technological countermeasures to prevent the defects were put forward. Production tests show that the use of improved technology to reduce the production of cylinder liner casting scrap from the original 18.7% ~ 22.5% to 2.5 ~ 3.7%, the microstructure and mechanical properties have been improved, with significant economic benefit