Effect of solid fraction on steel-mushy Cu-graphite pressing bonding

The pressing bonding of steel plate to QTi3.5-3.5graphite slurry was studied. The bonding conditions were 620℃ for preheating temperature of steel plate, 530℃ for preheating temperature of dies, 50 MPa for pressure and 2 min for pressing time. The relationship between the solid fraction of QTi3.5-3.5graphite slurry and the interracial mechanical property of bonding plate was obtained. The results show that when the solid fraction of QTi3.5-3.5graphite slurry is smaller than 45.8%, the interracial shear strength of bonding plate increases with the increasing of solid fraction. When the solid fraction is larger than 45.8%, the interracial shear strength decreases with the increasing of solid fraction. When the solid fraction is 45.8%, the largest interracial shear strength of bonding plate 127 MPa can be got, and the interface is made up of Fe-Cu solid solution.     

钢-Al-20Sn复合板的非均匀扩散复合研究

提出了消除钢-Al-20Sn复合板复合界面脆化的非均匀扩散思想,并采用Al-20Sn半固态浆料与钢板进行铸轧复合,实现了非均匀扩散,改变了复合界面结构,消除了复合板复合界面的脆化。研究结果表明,在500℃钢板预热温度、10mm/s铸轧速度条件下,当半固态浆料固相率为34.3%时,复合界面由比例恰当的铁铝化合物和铁铝固溶体交替构成,脆化得以消除,相应的最大界面剪切强度为69.9MPa。     

Ratio of Fe-Al compound at interface of steel-backed Al-graphite semi-solid bonding plate

The ratio of Fe-Al compound at the bonding interface of solid steel plate to Al-7graphite slurry was used to characterize the interfacial structure of steel-Al-7graphite semi-solid bonding plate quantitatively. The relationship between the ratio of Fe-Al compound at interface and bonding parameters (such as preheat temperature of steel plate, solid fraction of Al-7graphite slurry and rolling speed) was established by artificial neural networks perfectly. The results show that when the bonding parameters are 516 ℃ for preheat temperature of steel plate, 32.5% for solid fraction of Al-7graphite slurry and 12 mm/s for rolling speed, the reasonable ratio of Fe-Al compound corresponding to the largest interfacial shear strength of bonding plate is obtained to be 70.1%. This reasonable ratio of Fe-Al compound is a quantitative criterion of interfacial embrittlement, namely, when the ratio of Fe-Al compound at interface is larger than 70.1%, interfacial embrittlement will occur.     

Modeling and optimizing of steel and mushy Al-28Pb alloy bonding

1　ＩＮＴＲＯＤＵＣＴＩＯＮＡｔｐｒｅｓｅｎｔ,ｔｈｅｔｙｐｉｃａｌｍａｔｅｒｉａｌｏｆｎｅｏｔｙｐｅｂｅａｒ ｉｎｇｉｓｓｔｅｅｌ ｂａｃｋｅｄＡｌ 2 0Ｓｎａｌｌｏｙｂｏｎｄｉｎｇ ｐｌａｔｅ[1 ] .Ｆｏｒｓｔｅｅｌ ｂａｃｋｅｄＡｌ 2 0Ｓｎａｌｌｏｙｂｏｎｄｉｎｇｐｌａｔｅ ,ｓｔｅｅｌｂａｃｋｈａｓｈｉｇｈｓｔｒｅｎｇｔｈｗｈｉｃｈｃａｎｂｅａｒｔｈｅｅｘｔｅｒｎａｌｌｏａｄ ,ａｎｄＡｌ 2 0ＳｎａｌｌｏｙｌａｙｅｒｉｓａｌｕｂｒｉｃａｔｉｎｇｏｎｅｉｎｗｈｉｃｈＡｌｓｕｂｓｔｒａｔｅｈａｓｅｘｃｅｌ…     

Artificial neural networks in steel-mushy aluminum pressing bonding

1　ＩＮＴＲＯＤＵＣＴＩＯＮＦｏｒｓｔｅｅｌ ａｌｕｍｉｎｕｍｂｏｎｄｉｎｇ ,ｉｆａｌｕｍｉｎｕｍｓｏｌｉｄｆｒａｃｔｉｏｎｉｓ 10 0 % ,ｉｔｉｓｓｔｅｅｌ ａｌｕｍｉｎｕｍｓｏｌｉｄｔｏｓｏｌｉｄｂｏｎｄｉｎｇ ;ｉｆａｌｕｍｉｎｕｍｓｏｌｉｄｆｒａｃｔｉｏｎｉｓ 0 ,ｉｔｉｓｓｔｅｅｌ ａ ｌｕｍｉｎｕｍｓｏｌｉｄｔｏｌｉｑｕｉｄｂｏｎｄｉｎｇ ;ｉｆａｌｕｍｉｎｕｍｓｏｌｉｄｆｒａｃｔｉｏｎｉｓｗｉｔｈｉｎ 0～ 10 0 % ,ｔｈｅｂｏｎｄｉｎｇｉｓｓｔｅｅｌ ｍｕｓｈｙａｌｕｍｉｎｕｍｂｏｎｄｉｎｇ .Ｆｏｒ…     

Relationship between solid fraction and distribution of Pb in Al-Pb ingot

ＩＮＴＲＯＤＵＣＴＩＯＮＡｌ Ｐｂｈｙｐｅｒｍｏｎｏｔｅｃｔｉｃａｌｌｏｙｉｓａｎｅｗｔｙｐｅｂｅａｒ ｉｎｇｍａｔｅｒｉａｌ[1] .Ｇｒｅａｔｅｍｐｈａｓｉｓｈａｓｂｅｅｎｐｕｔｏｎｉｔｅｓ ｐｅｃｉａｌｌｙｓｉｎｃｅ 1990ｓ[2～ 4 ] .ＰｂｈａｓｅｘｃｅｌｌｅｎｔｌｕｂｒｉｃａｔｉｎｇｐｒｏｐｅｒｔｙｗｈｉｃｈｃａｎｍａｔｃｈｔｈａｔｏｆＳｎ ,ｂｕｔｉｔｓｃｏｓｔｉｓｍｕｃｈｌｏｗｅｒｔｈａｎｔｈａｔｏｆＳｎ ,ｓｏＡｌ ＳｎａｌｌｏｙｉｓｒｅｐｌａｃｅｄｂｙＡｌ Ｐｂａｌｌｏｙｉｎｔｈｅｆｉｅｌｄｏ…     

Interfacial structure of steel-Al-28Pb bonding plate with semisolid rolling-casting method

Fe-Al compound at the interface of steel-mushy A1-28Pb bonding plate was studied quantitatively. The relationship between ratio of Fe-Al compound at interface and bonding parameters such as preheating temperature of steel plate, solid volume fraction of Al-28Pb slurry and rolling speed, was established by artificial neural networks perfectly. The results show that when the bonding parameters are 546℃ for preheating temperature of steel plate,43.5% for solid volume fraction of Al-28Pb slurry and 8.6 mm/s for rolling speed, the reasonable ratio of Fe-Al compound corresponding to the largest interracial shear strength of bonding plate is obtained as 71.5%. This reasonable ratio of Fe-Al compound is a quantitative criterion of interracial embrittlement, that is, when the ratio of Fe-Al compound at interface is larger than 71.5%, interracial embrittlement will occur.     

Mechanical relationship in steel-aluminum solid to liquid bonding

1　INTRODUCTIONThecurrentproductsofsolidsteelplatetoliquidaluminumincludehot dipaluminizingsteelplate[1,2 ]andsteel aluminumsolidtoliquidbondingplatemain ly[3,4 ] .Theyarewidelyusedinornament ,machin ery ,automobileandnavigationfield .Fortheseprod ucts ,theinterfacialmechanicalpropertyiscrucial;itdeterminesthequalityandapplicationoftheseprod ucts .Thelargertheinterfacialmechanicalproperty ,thewidertheapplicationoftheproduct .Theinterfacialmechanicalpropertyisdeter minedbyinterfacialstruct…     

钢—铝固液相复合中浸镀助焊剂的应用研究

采用浸镀助焊剂的方法研究了助焊剂对钢－铝固液棹复合质量的影响。结果表明，浸镀助焊剂方法可以解决钢－铝固液相复合中接触界面氧化问题，以卤化物为主的助焊剂１号可大幅度提高钢－铝固液相复合界面的结合强度。     

Relationship between solid fraction of slurry and property of steel/mushy Al-20Sn semi-solid bonding

The slurry of Al-20Sn alloy was prepared using electromagnetic-mechanical stirring method.The bonding of steel/mushy Al-20Sn was conducted using casting rolling technique.The bonding parameters were 505℃ for preheat temperature of steel plate and 10mm/s for rolling speed.The interfacial mechanical property and structure of steel/mushy Al-20Sn bonding plate were studied.The results show that the relationship between solid fraction of Al-20Sn slurry and interfacial shear strength of bonding plate is S=52.9 0.998ψs-0.0144ψs^2(where S is interfacial shear strength,ψs is solid fraction.)The largest interfacial shear strength is 70.2MPa when solid fraction is 34.6%.The interface of bonding plate is made up of Fe-Al compound and Fe-Al solid solution alternatively.