随着航天工业的不断发展,对发动机机架要求越来越高;重量轻、强度高、塑性好等。目前我们采用了新研制的一种材料-F175,可达48～51,其塑性和韧性也很好。可是给机械加工方面带来了一定困难。 我们对F175材料进行了分析和试验,比较统一的认为有以下几个特点: 1.材料本身含有大量 With the continuous development of aerospace industry, the requirements for the engine rack are getting higher and higher; light weight, high strength, good plasticity. At present we use a newly developed material -F175, up to 48 ~ 51, its plasticity and toughness is also very good. But to the mechanical processing has brought some difficulties. We analyzed and tested the F175 material, the more uniform that the following characteristics: 1. The material itself contains a large number