原位合成TiN颗粒强化铁基合金粉末  

Iron base alloy powder reinforced by in-situ synthesis TiN particulates

作　　者：王天剑[1] 汤春峰[2] 曲选辉[1] 段柏华[1] 何新波[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]清华大学材料科学与工程系先进材料教育部重点实验室,北京100082

出　　处：《粉末冶金技术》2009年第3期163-165,169,共4页Powder Metallurgy Technology

摘　　要：研究了利用氮化工艺在铁合金粉末中原位合成氮化钛颗粒强化相。试验结果表明：氮化温度和热处理制度对合金生成相有重要影响，在1100～1250℃氮化后，可在合金粉末中原位生成TiN、CrN、Cr2N等第二相，经1300℃真空热处理后，CrN和Cr2N相消失，TiN仍稳定存在。合成的TiN颗粒细小，尺寸在1um左右，并均匀分布在基体粉末中。Iron base alloy powder reinforced by TiN particulates was fabricated using in-situ nitriding synthesis. The results show that nitriding temperature and treatment have important influence on precipitated phases in the powder. When nitriding at 1100℃ - 1 250℃, TiN and CrN and Cr2N can be synthesized in the alloy powder. After treatment at 1 300℃ in vacuum, CrN and Cr2N decompose, but TiN still exist stably. The SEM and TEM shows that the TiN particulates have fine size and are homogeneously distributed in the matrix.

关 键 词：原位合成 氮化钛 复合粉末 

分 类 号：TQ153.12[化学工程—电化学工业] TQ174.758