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对0Cr18Ni9Ti不锈钢经渗锆处理及渗碳处理后的试样,在620℃静态空气中低温预氧化6 h的氧化行为进行研究。结果表明:预氧化后,不锈钢基材表面主要形成FeCr0.29Ni0.16C0.06、Fe0.64Ni0.36、Fe2O3,出现较多深而宽的裂纹;渗Zr试样低温预氧化后表面主要为Fe2O3、ZrO2,试样表面致密、没有出现大的裂纹;渗Zr+渗C试样,低温预氧化后表面生成物主要为ZrO2,较渗Zr后更为致密,表面光滑且无孔洞与裂纹,基体与改性层结合牢固,抗高温氧化性能大为改善,试样表面的硬度约为2580 HV0.05,且由表及里试样硬度值呈梯度降低平缓。
The oxidation behavior of 0Cr18Ni9Ti stainless steel treated by carburizing and carburizing at 620 ℃ for 6 h under low temperature was studied. The results show that after pre-oxidation, the surface of stainless steel mainly forms FeCr0.29Ni0.16C0.06, Fe0.64Ni0.36 and Fe2O3, and there are more deep and wide cracks. The surface of Zr-infiltrated Zr alloy is mainly Fe2O3 , ZrO2, the sample surface is dense, there is no big cracks; Zr infiltration C sample, the surface after low temperature pre-oxidation of the main products of ZrO2, after infiltration Zr more dense, smooth surface and no holes and cracks, matrix and The combination of modified layer is firm and the oxidation resistance at high temperature is greatly improved. The hardness of the sample surface is about 2580 HV0.05, and the hardness value of the sample and the sample decreases gently.