850℃不同保温时间对15CrMo钢晶间氧化层的影响  

Effect of holding time at 850 ℃ on intergranular oxidation layer of 15CrMo steel

作　　者：史学星 鞠新华 严春莲 温娟 SHI Xuexing;JU Xinhua;YAN Chunlian;WEN Juan(Technical Research Institute of Shougang Group Co.,Ltd.,Beijing 100043,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043

出　　处：《物理测试》2022年第6期1-6,共6页Physics Examination and Testing

摘　　要：利用扫描电镜和电子探针研究了850℃不同保温时间对晶间氧化层的影响。结果表明,随着保温时间增加,15CrMo钢外层的氧化铁皮厚度逐渐增大而晶间氧化的深度则先增大后趋于稳定,其中当保温时间为30 min时,晶间氧化深度约为13μm,随后随着保温时间延长到120 min,晶间氧化深度约为17μm且趋于稳定。试验钢在晶间氧化处Mn、Cr、Si合金元素富集明显、晶界粗化且晶内氧化物质点增多。The effect of holding time at 850 ℃ on intergranular oxidation layer was studied by scanning electron microscope(SEM) and electron probe. The results showed that with the increase of holding time, the oxide scale thickness of the outer layer of 15CrMo steel increased gradually, but the intergranular oxidation depth increased first and then tended to be stable. When the holding time was 30 min, the intergranular oxidation depth was about 13 μm. When the time increased to 120 min, the intergranular oxidation depth was about 17 μm and tended to be stable. The alloying elements including Mn, Cr and Si were enriched obviously in the location of intergranular oxidation. Moreover, the grain boundaries were coarsened and the quantity of oxide points in the grains increased.

关 键 词：15CRMO钢 保温时间 氧化铁皮 晶间氧化 元素富集 

分 类 号：TG174.4[金属学及工艺—金属表面处理]