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S195汽缸盖是缸径为95毫米单缸卧式柴油机的重要零件。铸件重9.4公斤。平均壁厚8毫米左右。材质为HT20—40。柴油机工作时,汽缸盖壁部内外温差大,热应力大,因此对机械性能有较高的要求。技术条件规定,汽缸盖靠燃烧室一面的硬度为HB179~255。目前生产中,汽缸盖的硬度合格率很低,对此我们进行了分析研究,做了一些试验,以寻求解决这一问题的方法。
The S195 cylinder head is an important part of a 95 mm single cylinder horizontal diesel engine. Casting weight 9.4 kg. The average wall thickness of about 8 mm. Material is HT20-40. Diesel engine work, the cylinder head wall temperature difference between inside and outside the large, thermal stress, so the mechanical properties have higher requirements. Technical conditions, the cylinder head by the side of the hardness of the HB179 ~ 255. In the current production, the hardness of the cylinder head pass rate is very low, we conducted an analysis of this, do some experiments to find ways to solve this problem.