摘要
在氩气保护条件下,用镍基合金钎料在45钢基体上对金刚石磨粒进行了激光钎焊试验,采用扫描电镜(SEM)和能谱仪(EDS)及X射线衍射仪(XRD)对钎焊金刚石试样进行了分析。结果表明:激光钎焊过程中在金刚石表面附近形成的富铬层与金刚石表面的碳元素反应生成Cr_3C_2、Cr_7C_3、Cr_(23)C_6,镍铬合金钎料和钢基体中的元素相互扩散在钢基体结合界面上形成化学冶金结合。
Brazing diamond grits to 45 steel substrate using Ni-based filler alloy was carried out via laser in an argon atmosphere. The brazed diamond specimens were detected by scanning electron microscopy （SEM）, X-ray diffraction （XRD） and energy dispersive X-ray spectroscopy （EDS）. All the results indicate that the chromium in the Ni-based alloy segregated preferentially to the surface of the diamond to form chromium-rich reaction products Cr3 C2, Cr7 C3, Cr23 C6, and the bond between the alloy and the steel substrate is established through a cross-diffusion of iron and Ni-base alloy.
出处
《机械工程材料》
CAS
CSCD
北大核心
2007年第5期17-19,23,共4页
Materials For Mechanical Engineering
基金
国家自然科学基金(5H52060)
