【摘要】：首先采用粉末包埋法對工業(yè)純銅進(jìn)行滲鋁,為進(jìn)一步提高滲鋁層強化效果,采用固溶處理、時效、深冷處理等多種工藝對工業(yè)純銅滲鋁層進(jìn)行熱處理。對熱處理后的滲層的組織結(jié)構(gòu)、硬度、耐磨性、耐蝕性及抗氧化性進(jìn)行了研究。研究結(jié)果表明,滲鋁層為α+(α+γ_2)組織。固溶水冷后,獲得類似馬氏體的針狀組織β',深冷處理后,獲得具有一定脫溶析出的細(xì)小β'組織,β'在300℃時效處理時發(fā)生脫溶,析出大量彌散析出相。經(jīng)各種熱處理后,硬度、耐磨性、耐蝕性及抗氧化性均有所提高。其中,固溶加熱后直接液氮冷卻+時效處理后,硬度達(dá)145.9 HRF;時效處理后大量彌第二相析出,有利提高耐磨性;滲層耐蝕性較純銅提高一個數(shù)量級;熱處理后組織更為細(xì)小致密,有效抑制表面氧化,表現(xiàn)出更好的抗氧化性。本研究采用的復(fù)合熱處理工藝使純銅滲鋁層使用性能大幅提高,具有十分重要的實際應(yīng)用價值。
[Abstract]:Firstly, aluminizing of industrial pure copper was carried out by powder embedding method. In order to further improve the strengthening effect of aluminized layer, solid solution treatment, aging, cryogenic treatment and other processes were used to heat treat the aluminized layer of industrial pure copper. The microstructure, hardness, wear resistance, corrosion resistance and oxidation resistance of the infiltrated layer after heat treatment were studied. The results show that the aluminized layer is 偽 (偽 緯 _ 2) structure. After solid solution water cooling, the acicular structure 尾 'similar to martensite was obtained. After cryogenic treatment, the fine 尾' structure with a certain degree of desolubilization and precipitation was obtained. 尾 'was desoluted and a large number of dispersed precipitates were precipitated when the 尾' was aged at 300 鈩，

本文編號：2486735