喷射成形H13钢的抗氧化性  

Oxidation resistance of spray-formed H13 steel

作　　者：曹飞杨 谢敬佩[1] 王淼辉[2] 刘恒三[2] 张展展[3] 鲁思渊[4] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471023 [2]机械科学研究总院先进制造技术研究中心,北京100083 [3]北京科技大学材料科学与工程学院,北京100083 [4]清华大学材料学院,北京100084

出　　处：《金属热处理》2016年第3期134-137,共4页Heat Treatment of Metals

摘　　要：分别在600、650和700℃温度下对喷射成形H13钢循环加热100 h,通过XRD、SEM、EDS、称量增重等方法分析了喷射成形H13钢氧化膜的物相类型,氧化层形貌,元素分布和质量变化规律。结果表明,经过100 h保温后,试样表面形成了两层氧化膜,外层氧化膜主要由Fe_2O_3和Cr_2O_3组成,组织疏松,有较多孔洞;内层氧化膜是尖晶石结构的NiCr_2O_4/NiCrO_4化合物,组织致密不易脱落,有效阻碍了O_2和合金元素的扩散。与铸造H13相比,喷射成形H13钢具有更好的抗氧化性能。Oxidation resistance of spray-formed H13 steel was researched via weighing after respectively heated at 600 ℃,650 ℃ and700 ℃ for 100 h. The phase type,oxide scale morphologies,and element distribution of the oxidized sample were analyzed by XRD,SEM observation and EDS analysis. The results show that the oxide scale on 100 h holding heated sample is consisted with two parts,the outer layer of the oxide scale is mainly composed of Fe_2O_3 and Cr_2O_3,and the structure of which is loose and porous,whereas,the oxide scale inner is mainly composed of spinelle-structured Ni Cr_2O_4/ Ni Cr O_4,which can effectively hinder the diffusion of O_2 and alloy element because of their dense structure and hard to exfoliate from the steel surface. Overall,the oxidation resistance of the spray-formed H13 is better than that of the traditional melted H13 steel.

关 键 词：喷射成形 H13钢 抗氧化性 

分 类 号：TG142.1[一般工业技术—材料科学与工程]