一重技术
一重技術
일중기술
CFHI TECHNOLOGY
2014年
3期
25-28
,共4页
喷射成形%高强铝合金%热处理%微观组织%机械性能
噴射成形%高彊鋁閤金%熱處理%微觀組織%機械性能
분사성형%고강려합금%열처리%미관조직%궤계성능
spray deposit%high-strength aluminium alloy%heat treatment%microstructure%mechanical property
采用喷射沉积技术制备Al-10.84Zn-2.81Mg-1.45Cu-0.18Zr合金，并研究合金的组织变化和机械性能。结果表明，由于冷却速度较快，沉积态合金的晶粒尺寸低于30μm。喷射沉积Al-Zn-Mg-Cu合金主要由α-Al基体，η-(MgZn2)和Al2CuMg相组成，其中η-(MgZn2)为主要的析出相。合金中第二相经锻造后进一步细化，为后续热处理打下基础。锻件经双级固溶和峰值时效后，拉伸强度，屈服强度和延伸率分别为771.7 MPa，749.0 MPa和7.9%。
採用噴射沉積技術製備Al-10.84Zn-2.81Mg-1.45Cu-0.18Zr閤金，併研究閤金的組織變化和機械性能。結果錶明，由于冷卻速度較快，沉積態閤金的晶粒呎吋低于30μm。噴射沉積Al-Zn-Mg-Cu閤金主要由α-Al基體，η-(MgZn2)和Al2CuMg相組成，其中η-(MgZn2)為主要的析齣相。閤金中第二相經鍛造後進一步細化，為後續熱處理打下基礎。鍛件經雙級固溶和峰值時效後，拉伸彊度，屈服彊度和延伸率分彆為771.7 MPa，749.0 MPa和7.9%。
채용분사침적기술제비Al-10.84Zn-2.81Mg-1.45Cu-0.18Zr합금，병연구합금적조직변화화궤계성능。결과표명，유우냉각속도교쾌，침적태합금적정립척촌저우30μm。분사침적Al-Zn-Mg-Cu합금주요유α-Al기체，η-(MgZn2)화Al2CuMg상조성，기중η-(MgZn2)위주요적석출상。합금중제이상경단조후진일보세화，위후속열처리타하기출。단건경쌍급고용화봉치시효후，랍신강도，굴복강도화연신솔분별위771.7 MPa，749.0 MPa화7.9%。
The paper introduces a kind of AL-10.84Zn-2.81Mg-1.45Cu-0.18Zr that is made with a spray deposit technique and analyses its microstructure evolution and mechanical property. Thanks to high cooling rate, the as-deposited alloy obtains grain size below 30 μm. The spray deposited Al-Zn-Mg-Cu alloy consists of α-Al matrix, η- ( MgZn2) and Al2CuMg phases. Theη- (MgZn2) is main precipitated phase. The second phase of the alloy is refined in further by forging operation, which lays the basis for subsequent heat treatment. The forging is subject to two-stage solution heat treatment and peak ageing treatment and obtains the tensile strength of 771.7 MPa, yield strength of 749.0 MPa and elongation of 7.9%.
