Mn对ZA40合金微观组织和性能的影响  

Effects of Mn Addition on Microstructure and Properties of ZA40 Alloy

作　　者：李丹[1] 何顺荣[1] 李伟[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《有色金属加工》2015年第5期17-22,52,共7页Nonferrous Metals Processing

摘　　要：文章以ZA40合金为研究对象,通过对其添加不同含量的Mn来研究Mn元素对ZA40合金微观组织、硬度以及摩擦磨损性能的影响。试验结果表明,只需加入微量的Mn,合金组织的基体晶粒就会得到明显的细化,富锰硬质点在组织中呈点状和颗粒状分布。当Mn含量达到0.75%时,合金中开始有富锰相出现;此后,如果继续加大Mn含量,富锰相开始聚集并呈条状和块状集中于晶界;当Mn含量达到1.5%时,富锰相呈片状组织贯穿晶界。在0~0.75%范围内,合金硬度随着Mn元素含量的增加而显著提高。但是,当Mn元素含量超过1.0%之后,增加Mn元素含量对合金硬度的影响就变得不明显了。此外,在合金中加入少量的Mn元素即可显著地提高其耐磨性。当Mn含量为1.0%时,合金的摩擦磨损性能最好。The paper studied effects of Mn addition on microstructure,hardness,and friction and wear properties of ZA40 alloy.The results showed that matrix grain refinement became obvious by adding trace amounts of Mn while Mn-rich hard spots distributed in dotted and granular form. Mn-rich phase was observed in alloy with Mn content of 0. 75%; with the increase of Mn content,the phase was seen to gather and concentrate in strip-like and blocky within grain boundary,and it was in the shape of flake across grain boundary with Mn content of 1. 5%; when Mn content was kept at 0 ~ 0. 75%,alloy hardness increased obviously with the increase of Mn content; however,when Mn content exceeded 1. 0%,the increase in Mn content had low impact on hardness; furthermore,wear resistance was improved significantly with small amount of Mn and optimal friction and wear properties were to keep Mn content at 1. 0%.

关 键 词：ZA40合金 硬度 摩擦磨损性能 耐磨性 

分 类 号：TG146.21[一般工业技术—材料科学与工程]