Abstract

In this study, AISI 303 steels are boronized by pack boring method at 1123, 1173 and 1223 K for 2, 4 and 6 h. The morphology of the boride layers formed on the steel surfaces was examined by optical microscope. The hardness values were measured by the micro-hardness tester and the phases formed on the layer were determined by XRD method. In the XRD analysis, FeB, Fe₂B, CrB and MnB phases were formed on the boride layer. Results showed that the thickness of boride layer obtained in boronized steel was increased by increasing the boring time and temperature. In addition, the thickness values of the boride layer varied depending on the chemical composition of the steel. The original hardness of AISI 303 steel was 240 HV_0.05, while the boronizing process resulted in a hardness of 1897 HV_0.05. The boride layer on the AISI 303 steel was formed and the thickness and growth kinetics of the layer were investigated. The activation energy (Q) of the boronized AISI 303 steel was determined as 236.502 kJ / mol.

中文翻译：

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包渗硼研究AISI 303渗硼后的扩散动力学值

摘要

在这项研究中，AISI 303钢在1123、1173和1223 K下通过装填镗孔法进行了2、4和6 h的硼化处理。用光学显微镜检查在钢表面上形成的硼化物层的形态。通过显微硬度测试仪测量硬度值，并通过XRD方法确定在层上形成的相。在XRD分析中，在硼化物层上形成FeB，Fe ₂ B，CrB和MnB相。结果表明，通过增加镗孔时间和温度可以增加在渗硼钢中获得的硼化物层的厚度。另外，硼化物层的厚度值根据钢的化学组成而变化。AISI 303钢的原始硬度为240 HV _0.05，而渗硼过程产生的硬度为1897 HV_0.05。在AISI 303钢上形成了硼化物层，并研究了该层的厚度和生长动力学。硼化的AISI 303钢的活化能（Q）确定为236.502 kJ / mol。