摘要
为了开发高温钢背轴瓦材料,采用半固态压力复合方法制备了钢-QTi3.5-3.5石墨复合板,研究了钢板与QTi3.5-3.5石墨半固态浆料的压力复合行为,得到了QTi3.5-3.5石墨半固态浆料固相率与复合板界面力学性能之间的关系,确定了复合界面的组织结构。结果表明:在钢板预热温度为620℃、模具预热温度为530℃、压力为50MPa、施压时间为2min复合条件下,当QTi3.5-3.5石墨半固态浆料固相率小于45.8%时,复合板界面剪切强度随固相率的增大而增大;当半固态浆料固相率大于45.8%时,界面剪切强度随固相率的增大而减小;当QTi3.5-3.5石墨半固态浆料固相率等于45.8%时,可得到最大复合板界面剪切强度127MPa,与之对应的复合界面不存在复合缺陷,形成了由Fe-Cu互扩散区构成的冶金结合界面结构。
In order to develop a high temperature steel-backed bearing materials,the steel-QTi3.5-3.5 graphite bonding plate was prepared by semi-solid pressing bonding method.The relationship between mechanical properties of bonding plate interface and solid fraction of QTi3.5-3.5 graphite slurry can be derived by examining the pressure bonding behavior between steel plate and QTi3.5-3.5 graphite slurry,having determined the structure constituent of the bonding interface.The results show that under the conditions of preheated temperature at 620 ℃ for steel plat,and preheated temperature at 530 ℃ for the die,pressure at 50 MPa and holding pressure time for 2 min,when the solid fraction of QTi3.5-3.5 graphite slurry is lower than (45.8%,)the shearing strength of bonding plat interface increase with solid fraction increase while decrease with solid fraction increase when the solid fraction is higher 45.8%.When the solid fraction is 45.8%,the highest shearing strength of bonding plate can be obtained,correspondingly,there no bonding defects in the interface,forming the metallurgical bonding structure composed of Fe-Cu inter-diffusion zone.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2005年第9期541-543,共3页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(50274047
50304001)
教育部重点基金资助项目(105040)
北京交通大学校基金资助项目
关键词
半固态压力复合
固相率
力学性能
Semi-solid Pressure Bonding,Solid Fraction,Mechanical Properties
