In the present study, the AISI D2 steel has been treated by the plasma paste boriding process using a gas mixture of 70% H₂-30% Ar with 70% of borax and 30% SiC. The boriding treatment has been carried out at 700, 750 and 800 °C for an exposure time of 3 to 7 h. The plasma paste borided samples have been investigated by various techniques such as scanning electron microscopy, optical microscopy, XRD analysis, micro-hardness Vickers and the rockwell-C adhesion tests. The fracture toughness has also been measured on the plasma paste borided samples under different values of indentation load. From a kinetic point of view, the boride layers have obeyed the parabolic growth law. The value of boron activation energy for AISI D2 steel has been estimated as 130 kJ mol^–1 using our experimental results. In addition, this obtained activation energy has been compared to the literature data.

中文翻译：

---

等离子浆料硼化在AISI D2钢上形成的硼化物层的力学性能和动力学

在本研究中，通过使用70％H ₂ -30％Ar与70％硼砂和30％SiC的气体混合物通过等离子体糊化硼化工艺处理了AISI D2钢。硼化处理已在700、750和800°C下进行了3到7 h的暴露时间。通过各种技术，例如扫描电子显微镜，光学显微镜，XRD分析，显微硬度维氏和Rockwell-C附着力测试，研究了浆糊硼化的样品。还测量了在不同压痕载荷值下等离子浆料渗硼样品的断裂韧性。从动力学的观点来看，硼化物层遵守了抛物线的生长规律。AISI D2钢的硼活化能值估计为130 kJ mol ^–1使用我们的实验结果。此外，已将获得的活化能与文献数据进行了比较。