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气缸套是在高温、高速和高压力条件下工作的,要求具有较高的强度和良好的耐磨性能。为了提高气缸套的耐磨性,不少单位作了很多的试验研究,例如,铬钼铜合金铸铁气缸套整体淬火调质处理,电接触表面淬火,辉光离子氮化,表面镀铬、镀铁、喷涂金属等。本文所述的试验研究是从材料方面着手,即不经过特殊热处理或表面处理,以求获得较高的耐磨性能。一般认为,在铸铁组织中,除石墨和珠光体以外,再析出一种硬化相,将有利于提高气缸套的耐磨性能。目前,气缸套材料普遍采用合金铸铁和中磷铸铁。合金铸铁的硬化相是不多的,主要是通过加入镍、铬、钼、铜、钒等
Cylinder liner is in high temperature, high speed and high pressure conditions, requires high strength and good wear resistance. In order to improve the wear resistance of cylinder liner, many units made a lot of experimental research, for example, chrome molybdenum-copper alloy cast iron cylinder sleeve quenching and tempering the whole quenching, electrical contact surface hardening, glow ion nitriding, chrome plating, iron plating , Spraying metal and so on. The experimental study described in this article is from the material side, that is, without special heat treatment or surface treatment, in order to obtain higher wear resistance. Generally believed that in cast iron, in addition to graphite and pearlite, the precipitation of a hardened phase, will help improve the wear resistance of the cylinder liner. At present, the cylinder liner material commonly used alloy cast iron and phosphorus cast iron. Alloy cast iron hardening phase is not much, mainly by adding nickel, chromium, molybdenum, copper, vanadium, etc.