温度对40Cr13钢等离子表面渗铌层组织的影响

发布时间：2018-04-12 21:59

  本文选题：等离子表面合金化 + 马氏体不锈钢　； 参考：《材料科学与工艺》2015年02期

【摘要】：为提高马氏体不锈钢的耐蚀和耐磨性能,选择40Cr13不锈钢为基材、纯铌板为靶材,采用双辉等离子表面冶金技术在不锈钢表面制备合金化层.用SEM、GDOES、XRD等方法分析渗铌温度对铌合金层组织、成分、相组成、表面形貌及硬度的影响,并对渗层形成机制及表面硬化机理进行了研究.结果表明:在900~1 000℃形成的铌合金层组织均匀致密,合金层主要由Nb2C、Nb C、Fe2Nb、Cr2Nb及铌组成;合金层表面粗糙度随渗铌温度的提高而增加;合金层厚度随渗铌温度改变发生不同变化规律,950℃渗铌形成的渗层约13μm,900和1 000℃渗铌后合金层厚度均为7μm左右;不同温度渗铌后试样的表面硬度与基体相比均有较大幅度的提高,1 000℃渗铌后试样表面硬度高达约985 HV0.025,900℃渗铌后约758 HV0.025,而950℃渗铌后表面硬度最低,约698 HV0.025.
[Abstract]:In order to improve the corrosion resistance and wear resistance of martensitic stainless steel, 40Cr13 stainless steel was selected as substrate and niobium plate was used as target material to prepare alloying layer on stainless steel surface by double glow plasma surface metallurgy technology.The effect of niobium temperature on the microstructure, composition, phase composition, surface morphology and hardness of niobium alloy layer was analyzed by means of SEMGDOESX XRD. The formation mechanism and surface hardening mechanism of the layer were also studied.The thickness of alloy layer varies with the change of niobium temperature. The alloy layer formed at 950 鈩，

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