上海有色金属
上海有色金屬
상해유색금속
SHANGHAI NONFERROUS METALS
2015年
2期
47-51
,共5页
CuNi2Si 合金%热处理%冷变形%时效%性能%组织
CuNi2Si 閤金%熱處理%冷變形%時效%性能%組織
CuNi2Si 합금%열처리%랭변형%시효%성능%조직
CuNi2Si alloy%heat treatment%cold deformation%aging%properties%microstructure
研究了不同预冷变形条件下时效温度及时间对 CuNi2Si 合金组织和性能的影响．结果表明：合金在880℃×2．5 h 固溶，经不同预冷变形后时效，具有较强的时效强化特性；同时预冷变形能够促进时效过程中第二相的析出，并具有晶界析出倾向；当预冷变形达40％，500℃×1 h 时效，合金布氏硬度（HB）达193，抗拉强度（R m ）达765 MPa，伸长率达11％，与未进行预冷变形的合金相比，可获得较高的硬度、强度及较好的综合性能．合金热处理后的拉伸断口为韧性断裂，形貌特征为沿晶型韧窝，这与析出相具有晶界析出倾向的特性一致．
研究瞭不同預冷變形條件下時效溫度及時間對 CuNi2Si 閤金組織和性能的影響．結果錶明：閤金在880℃×2．5 h 固溶，經不同預冷變形後時效，具有較彊的時效彊化特性；同時預冷變形能夠促進時效過程中第二相的析齣，併具有晶界析齣傾嚮；噹預冷變形達40％，500℃×1 h 時效，閤金佈氏硬度（HB）達193，抗拉彊度（R m ）達765 MPa，伸長率達11％，與未進行預冷變形的閤金相比，可穫得較高的硬度、彊度及較好的綜閤性能．閤金熱處理後的拉伸斷口為韌性斷裂，形貌特徵為沿晶型韌窩，這與析齣相具有晶界析齣傾嚮的特性一緻．
연구료불동예랭변형조건하시효온도급시간대 CuNi2Si 합금조직화성능적영향．결과표명：합금재880℃×2．5 h 고용，경불동예랭변형후시효，구유교강적시효강화특성；동시예랭변형능구촉진시효과정중제이상적석출，병구유정계석출경향；당예랭변형체40％，500℃×1 h 시효，합금포씨경도（HB）체193，항랍강도（R m ）체765 MPa，신장솔체11％，여미진행예랭변형적합금상비，가획득교고적경도、강도급교호적종합성능．합금열처리후적랍신단구위인성단렬，형모특정위연정형인와，저여석출상구유정계석출경향적특성일치．
The paper studied the effects of aging temperature and time on alloy CuNi2Si microstructure and properties after cold rolling.The results show that alloys soluting at 880 ℃×2.5 h,aging after different cold deformation ratios,manifested strong age-hardening properties;at the same time,cold pre-deformation can promote the secondary-phase precipitation in the aging process,with the tendency of grain boundaries precipitation.Alloy hardness achieved 193(HB)and tensile strength(R m )reached 765 MPa with 11% of elongation when the alloy with 40% cold deformation aged at 500 ℃×1 h. Besides high hardness,strength and overall performance of the alloy improved.Heat-treated tensile fracture surface of alloys is characterized by ductile fracture and crystal-shaped dimples,which complies with the grain boundaries characteristic of precipitation phases.
