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因内燃机气阀要在高强(约600～700℃)下承受冲击和磨擦,因此要求材料要有好的耐热性(高温抗氧化性),耐磨性以及一定的强度和韧性,所以一般都采用耐热钢CX8、ЭИ107来制造。英美资料中还有利用耐热钢再经喷铝或渗铝的。ЭИ107、CX8材料价格较高,而且目前国内供应困难,因此我厂根据一机部热处理协调会议的精神试用35号中碳钢经渗铝后以代替之,经实际试车结果证明:这种代用品是完全可以代替硅铬钢。在试验过程中除用固体渗铝法外也曾用过液体渗铝法,经过多次试验,认为固体渗铝对于我厂的生产情况和生产条件较为适合。同时固体渗铝后的工件表面较光
Since internal combustion engine valves are subject to impact and friction at high strength (about 600 to 700 ° C), materials are required to have good heat resistance (high temperature oxidation resistance), abrasion resistance, and certain strength and toughness, and therefore generally Made of heat-resistant steel CX8, ЭИ107. Anglo-American materials also use heat-resistant steel spray aluminum or aluminized. ЭИ107, CX8 material prices higher, and the current domestic supply difficulties, so I plant a heat treatment according to the spirit of the Ministry of Coordination Meeting try 35 medium carbon steel after aluminizing instead, after the actual test results show that: This substitute Is completely replaceable silicon chromium steel. In addition to the solid aluminizing process has also been used in the test liquid aluminizing method, after many tests, that the solid aluminizing for my factory production conditions and production conditions are more suitable. At the same time, the surface of the workpiece after solid aluminizing light