磁记录用Co-Cr-Pt合金的制备及其表征

摘要

CoCrPt casting alloy was prepared by vacuum melting method. It was quenched under three different conditions, and was hot rolled at 1000℃. The structure and morphology of alloys were investigated by means of X -ray diffraction (XRD) and scanning electronic microscopy(SEM). The results indicated that CoCrPt casting alloy consist of three phases, which are fcc εCo solid solution ,hcp εCo solid solution, and chromium oxide. The bulk proportion of hcp εCo sosoloid was raised in the quenching alloy.The rolling alloy was also composed of the same three phases.%用真空熔炼法制备得到的CoCrPt合金铸锭,采用不同淬火条件优化其相组成,采用1000℃保温50 min后热轧的工艺对其进行热加工;利用X射线衍射仪(XRD)、金相和扫描电子显微镜(SEM)分析合金的结构和形貌.结果表明:所制备的CoCrPt合金铸锭由高温相面心立方固溶体(αCo)和低温相密排六方固溶体(εCo)及氧化铬黑色颗粒3种物相组成,Cr和Pt在钴合金中主要以固溶的形式存在.淬火后的Co基合金中hcp相的体积比例明显提高.热轧后的合金也是由αaCo固溶体、εCo固溶体和氧化铬黑色颗粒3种物相组成.