Relationship between Properties and Solid Fraction in Steel-mushy QTi3.5-3.5 Graphite by Pressure Bonding

Du Yunhui Zhang Peng Liu Hanwu

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Relationship between Properties and Solid Fraction in Steel-mushy QTi3.5-3.5 Graphite by Pressure Bonding
Issue 9, Pages: 541-543(2005)
Published： 2005 ，
DOI：

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[1]杜云慧,张鹏,刘汉武.钢-QTi3.5-3.5石墨半固态压力复合性能与固相率的关系[J].特种铸造及有色合金,2005(09):541-543+510.

Du Yunhui Zhang Peng Liu Hanwu. Relationship between Properties and Solid Fraction in Steel-mushy QTi3.5-3.5 Graphite by Pressure Bonding. [J]. Special Casting & Nonferrous Alloys (9):541-543(2005)
[1]杜云慧,张鹏,刘汉武.钢-QTi3.5-3.5石墨半固态压力复合性能与固相率的关系[J].特种铸造及有色合金,2005(09):541-543+510. DOI：

Du Yunhui Zhang Peng Liu Hanwu. Relationship between Properties and Solid Fraction in Steel-mushy QTi3.5-3.5 Graphite by Pressure Bonding. [J]. Special Casting & Nonferrous Alloys (9):541-543(2005) DOI：

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。

Abstract

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.