论文部分内容阅读
耐热铜合金在现代的机器制造业中得到广泛应用,因为它具有一系列与其他耐热合金不同的特点。耐热铜合金的工作条件是十分恶劣的:高温和侵蚀性液体的作用,腐蚀性损耗等。本文是研究铜合金08和19经铝扩散饱和又经铬扩散后的耐热性和抗腐蚀性。铝饱和过程用非接触法在粉末状混合物里进行,混合物成份(%)为48 Al、50 Al_2O_3和2NH_4Cl,温度在980℃持续0.5到2小时,渗铝铬的工艺包含二个连续过程,表面渗铝在980℃下进行0.5小时,紧接着扩散铬,它是用接触法,混合物成份(%)为70Cr,23Al_2O_3和7NH_4Cl,温度在980℃,持续6—12小时。照片11是合金 p×08经980℃下进行0.5小时表面渗铝和9小时渗铝铬后的金相图,合金 p×08和19的表面渗铝层
Heat-resistant copper alloy in the modern machinery manufacturing industry has been widely used, because it has a series of different heat-resistant alloys with different characteristics. Heat-resistant copper alloy working conditions are very poor: the role of high temperature and aggressive liquids, corrosive loss and so on. This article is to study the heat resistance and corrosion resistance of copper alloys 08 and 19 after being diffused by aluminum and diffused by chromium. The aluminum saturation process was carried out by a non-contact method in a powdery mixture of 48 Al, 50 Al 2 O 3 and 2 NH 4 Cl at a temperature of 980 ° C for 0.5 to 2 hours. The aluminized chromium process consisted of two successive processes, the surface Aluminizing was carried out at 980 ° C for 0.5 hour followed by diffusion of chromium using a contact method with 70Cr, 23Al_2O_3 and 7NH_4Cl of the mixture at 980 ° C for 6-12 hours. Photo 11 is a metallographic view of the alloy p × 08 after aluminizing at 980 ° C for 0.5 hours and after aluminizing for 9 hours. The surface aluminized layers of alloys p × 08 and 19