(湖南大學(xué) 材料科學(xué)與工程學(xué)院，長沙 410082)
摘 要: 采用彎曲實驗、金相和掃描電子顯微鏡，研究軋制溫度、變形量對鋼/鋁復(fù)合板熱軋復(fù)合的結(jié)合強度、界面和厚比分配的影響。結(jié)果表明：在軋制溫度低于400 ℃時，彎曲次數(shù)隨著預(yù)熱溫度的升高而增加，之后又逐漸減少；軋制溫度在400 ℃時鋼/鋁復(fù)合板結(jié)合界面的結(jié)合強度最大；隨著軋制溫度的升高，鋁層的壓下量增加，鋼層的壓下量減小，致使兩者壓下量的差值增加；總的壓下量越大，彎曲次數(shù)越多，結(jié)合界面和結(jié)合強度越好；當總壓下量為20%~30%時，彎曲次數(shù)隨壓下量的增加而緩慢增加；當總壓下量＞30%時，彎曲次數(shù)隨壓下量的增加而快速增加；隨著總壓下量的增加，鋼和鋁的壓下量成正比關(guān)系增加，變化趨勢相同，組元壓下量的差值隨總壓下量的增加而減小，變形量趨于一致。
關(guān)鍵字: 鋼/鋁復(fù)合板；熱軋復(fù)合；結(jié)合強度
（College of Materials Science and Engineering, Hunan University, Changsha 410082, China）
Abstract: The effects of rolling temperature and reductions on the bonding strength, interface and distribution of thickness ratio of the steel/aluminum metal-laminate materials, which were prepared by hot-rolling process, were studied by using bending tests and metallographic microscopy and scanning electron microscopy. The results indicate that the number of bending increases with increasing rolling temperatures below 400 ℃, whereas decreases after that. The maximum bond strength is obtained at 400 ℃. With increasing the rolling temperature, the rolling reduction of the aluminum layer increases while the steel layer decreases. At a given total rolling reduction, this leads the difference of reduction between aluminum and steel layer increasing. The number of bending and the bond strength increase with increasing the total rolling reduction. The increment of the number of bending is quite small when the total rolling reduction is ranged from 20% to 30%, but extremely large when the total rolling reduction exceeds 30%. The rolling reductions of both layers increase in direct proportion with the total rolling reduction, and the difference between them gradually diminishes and even towards a leveling.
Key words: steel/aluminum metal-laminate material; hot roll bonding; bond strength
