改性纳米SiC粉体强化铸造双相不锈钢的组织与性能  

Research on the Microstructure and Property of Surface Modified SiC Nanometer Powder Reinforced Cast Duplex Stainless Steel

作　　者：陈美玲[1] 刘长和[1] 张力明[1] 杨军[1] 高宏[1] 

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028

出　　处：《大连交通大学学报》2009年第5期48-51,共4页Journal of Dalian Jiaotong University

摘　　要：采用冲入法制备改性纳米SiC粉体强化的双相不锈钢材料.通过金相组织观察,力学性能检测以及在扫描电镜下的断口形貌分析,研究了不同改性纳米SiC粉体加入量对铸造双相不锈钢的组织和性能的影响.研究结果表明,经改性纳米SiC粉体强化后的双相不锈钢组织明显细化,力学性能得到显著提高.断口结果分析表明,经过强韧化处理后,双相不锈钢的断裂方式为典型的韧性断裂.A cast duplex stainless steel sample reinforced by surface modified SiC nano-powders was prepared under industrial conditions by foundry method. Through observing the microstructure, examining the mechanical properties and analyzing the fracture appearance by SEM, the microstructure and mechanical properties of the samples with different contents of nano-SiC powders were investigated. The result shows that compared with the samples without nano-SiC powders, the reinforced cast duplex stainless steel is characterized with finer microstructure and markedly improved mechanic properties. The analysis results of the fracture section indicate that the fracture behavior of the reinforced duplex stainless steel is typical ductile fracture.

关 键 词：改性SiC超细粉体 双相不锈钢 微观组织 韧性断裂 

分 类 号：TG260[金属学及工艺—铸造]