铬含量对高碳铬铁铸渗层组织及性能的影响  

Effect of Cr content on microstructure and mechanical properties of high carbon ferrochrome cast-infiltrated layer

作　　者：魏毅[1,2] 张洋[2] 谷亦杰[1] 张展展[2] 

机构地区：[1]山东科技大学材料科学与工程学院,山东青岛266510 [2]机械科学研究总院先进制造技术研究中心,北京100083

出　　处：《金属热处理》2017年第5期33-37,共5页Heat Treatment of Metals

摘　　要：采用铸渗工艺在45钢表面获得高碳铬铁铸渗层,通过改变铸渗合金粉末中Cr含量,研究了Cr含量对铸渗层组织及性能的影响。结果表明:铸渗层与基体呈良好的冶金结合,主要的碳化物有Cr_7C_3、Fe_3C、Cr_(23)C_7;并且随着Cr含量的增加,菊花状弥散分布的Cr_7C_3型碳化物明显增多,当合金粉末中铬含量为60%时,铸渗层硬度较高,此时铸渗层耐磨性能最佳,是基体的1.7倍。Cast-infiltrated layer with high chromium cast iron was prepared on surface of 45 steel by cast-infiltration process. Effect of Cr content on microstructure and mechanical properties of the high carbon ferrochrome cast-infiltrated composite layer was investigated by changing Cr content in the cast-infiltration alloy power. The results show that the east infiltrated layer and the matrix have good metallurgical bonding. The main carbides are Cr7 C3 , Fe3 C and Cr23C7. With the increase of Cr content, the Cr7 C3 type carbides dispersively distributed in the form of chrysanthemum obviously increases. When the Cr content in the alloying powder is 60% , hardness of the cast infiltrated layer is higher and the wear resistance is the best, which is about 1.7 times of that of the matrix.

关 键 词：铸渗 组织及性能 高碳铬铁 

分 类 号：TG115.6[金属学及工艺—物理冶金]