CAJ | 학술논문

采用喷射沉积技术和热挤压致密化技术制备 Al-22Si 和 Al-27Si(质量分数)两种高硅铝合金,研究两种合金在不同载荷下的摩擦行为和磨损机理。结果表明,与铸态合金相比,喷射沉积技术制备的高硅铝合金具有晶粒细小、成分均匀的组织特征；在载荷为30,45,60和75 N 下,Al-22Si 合金的磨损以粘着磨损和氧化磨损为主；Al-27Si 合金在低载荷下以粘着磨损为主,在高载荷下的磨损行为时粘着磨损和磨粒磨损的混合磨损机制。含有较高硅含量的 Al-27Si 合金具有相对小的摩擦系数和磨损率。随着载荷增大,两种合金的磨损量逐渐增大。
채용분사침적기술화열제압치밀화기술제비 Al-22Si 화 Al-27Si(질량분수)량충고규려합금,연구량충합금재불동재하하적마찰행위화마손궤리。결과표명,여주태합금상비,분사침적기술제비적고규려합금구유정립세소、성분균균적조직특정；재재하위30,45,60화75 N 하,Al-22Si 합금적마손이점착마손화양화마손위주；Al-27Si 합금재저재하하이점착마손위주,재고재하하적마손행위시점착마손화마립마손적혼합마손궤제。함유교고규함량적 Al-27Si 합금구유상대소적마찰계수화마손솔。수착재하증대,량충합금적마손량축점증대。
The high-silicon content Al-22Si and Al-27Si (mass fraction)alloys were prepared by spray forming and hot extrusion technique.The friction behavior and wear mechanism of Al-22Si and Al-27Si alloys under dif-ferent loads at drying friction condition was investigation.The results show that,compared with the as-cast al-loy,the high-silicon content Al-Si alloys prepared by spray-forming process has the characteristics of the grain fine,uniform composition.At loads of 30,45,60,and 75 N,the wear mechanism of Al-22Si alloy is adhesive and oxidation wear,and it is mainly adhesion wear for Al-27Si alloy at low load.However,the wear mechanism of Al-27Si alloy at high load is the mixture of adhesive wear and abrasive wear.The wear rates of both alloys in-crease with increasing of load gradually.