机械工程材料
機械工程材料
궤계공정재료
Materials for Mechanical Engineering
2015年
11期
96-100
,共5页
许志华%李克%姚立峰%卢敏敏
許誌華%李剋%姚立峰%盧敏敏
허지화%리극%요립봉%로민민
铝-锰合金%稀土元素%变质%拉伸性能
鋁-錳閤金%稀土元素%變質%拉伸性能
려-맹합금%희토원소%변질%랍신성능
Al-Mn aluminum alloy%rare earth element%modification%tensile property
以Al-11%Y中间合金的形式向Al-1%Mn合金基体中添加稀土元素钇,制备了钇质量分数分别为0%,0.07%,0.21%,0.31%,0.38%的Al-1%Mn合金铸锭,然后依次进行固溶、热轧和冷轧处理,研究了稀土钇含量对合金铸态、热轧态和冷轧态显微组织、冷轧态的拉伸性能以及铸态硬度的影响.结果表明:稀土钇是A l-1%Mn合金的一种有效的变质剂,添加一定含量的稀土钇能有效地使粗大的初生α-Al枝晶变成圆整和细小的等轴晶;当钇的质量分数为0.31%时,晶粒的细化效果最好,铸态组织中α-Al晶粒的尺寸从163.5μm减小至38.2μm,冷轧态合金的抗拉强度、伸长率和铸态合金的硬度分别从未添加钇的267.62 MPa,8.2%,36.8 HV增至313.13 MPa,14.8%,39.42 HV.
以Al-11%Y中間閤金的形式嚮Al-1%Mn閤金基體中添加稀土元素釔,製備瞭釔質量分數分彆為0%,0.07%,0.21%,0.31%,0.38%的Al-1%Mn閤金鑄錠,然後依次進行固溶、熱軋和冷軋處理,研究瞭稀土釔含量對閤金鑄態、熱軋態和冷軋態顯微組織、冷軋態的拉伸性能以及鑄態硬度的影響.結果錶明:稀土釔是A l-1%Mn閤金的一種有效的變質劑,添加一定含量的稀土釔能有效地使粗大的初生α-Al枝晶變成圓整和細小的等軸晶;噹釔的質量分數為0.31%時,晶粒的細化效果最好,鑄態組織中α-Al晶粒的呎吋從163.5μm減小至38.2μm,冷軋態閤金的抗拉彊度、伸長率和鑄態閤金的硬度分彆從未添加釔的267.62 MPa,8.2%,36.8 HV增至313.13 MPa,14.8%,39.42 HV.
이Al-11%Y중간합금적형식향Al-1%Mn합금기체중첨가희토원소을,제비료을질량분수분별위0%,0.07%,0.21%,0.31%,0.38%적Al-1%Mn합금주정,연후의차진행고용、열알화랭알처리,연구료희토을함량대합금주태、열알태화랭알태현미조직、랭알태적랍신성능이급주태경도적영향.결과표명:희토을시A l-1%Mn합금적일충유효적변질제,첨가일정함량적희토을능유효지사조대적초생α-Al지정변성원정화세소적등축정;당을적질량분수위0.31%시,정립적세화효과최호,주태조직중α-Al정립적척촌종163.5μm감소지38.2μm,랭알태합금적항랍강도、신장솔화주태합금적경도분별종미첨가을적267.62 MPa,8.2%,36.8 HV증지313.13 MPa,14.8%,39.42 HV.
The rare earth element (yttrium)with mass fraction of 0%,0.07%,0.21%,0.31%,0.38% in the form of Al-1 1%Y intermediate alloy was respectively introduced into the Al-1%Mn aluminum alloy,then the prepared alloy ingot was treated in the order of solid solution,hot rolling and cold rolling.The effects of yttrium contents on the microstructures of as-cast,hot rolled and cold rolled alloys,the tensile properties of cold rolled alloy and the hardness of as-cast alloy were studied.The results show that yttrium is an excellent modifier for Al-1%Mn alloy and the primaryα-Al phases were refined from coarse dendrite to fine equiaxed grain after adding a certain content of yttrium.When the added yttrium content was about 0.31%,the grain refining effect was the most significant;the grain size ofα-Al was reduced from 163.5 μm to 38.2 μm.Meanwhile,the tensile strength and elongation of the cold rolled alloy and the micro-hardness of the casting Al-1%Mn alloy with 0.31% yttrium increased from 267.62 MPa,8.2% and 36.8 HV to 313.13 MPa,14.8% and 39.42 HV respectively.