Effect of temperature on oxidation during boriding of Ni-Hard 4

IF 2.4 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Testing Pub Date : 2024-03-14 DOI:10.1515/mt-2023-0385

Tuna Aydogmus

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Abstract

Ni-Hard 4, also known as white cast iron, is widely used in many applications that demand high mechanical strength. This material is recognized for its ability to withstand challenging conditions. In this study, surface modification processes, particularly boriding, were carried out on the material. Boriding is considered an effective process for enhancing the mechanical strength of a surface. While there are various methods for performing boriding, the pack-boriding method was chosen for this study. This method was applied in a typical heat treatment furnace. Ni-Hard 4 specimens were subjected to different combinations of temperature (1000–1200 °C) and 4 h duration, resulting in a total of three distinct samples. Subsequently, the microstructure, hardness, and chemical composition of the boride layers formed on the material’s surface were meticulously examined. As a result of the detailed analysis, it was determined that if the boriding process was carried out in a furnace without controlled atmosphere, high temperature oxidation started on the surface of Ni-Hard 4, and in this case it increased in parallel with the increase in temperature.

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温度对硼化镍硬质合金 4 过程中氧化作用的影响

Ni-Hard 4 又称白口铸铁，广泛应用于许多需要高机械强度的场合。这种材料因其能够经受挑战性条件的考验而得到认可。在本研究中，对这种材料进行了表面改性处理，特别是硼化处理。硼化被认为是提高表面机械强度的有效工艺。虽然进行硼化的方法多种多样，但本研究选择了包硼法。该方法在典型的热处理炉中进行。对 Ni-Hard 4 试样进行了不同的温度组合（1000-1200 °C）和 4 小时的持续时间处理，总共产生了三种不同的试样。随后，对材料表面形成的硼化物层的微观结构、硬度和化学成分进行了细致的检测。详细分析的结果表明，如果在没有控制气氛的熔炉中进行硼化过程，Ni-Hard 4 的表面就会开始高温氧化，在这种情况下，氧化程度会随着温度的升高而增加。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Materials Testing 工程技术-材料科学：表征与测试

CiteScore

4.20

自引率

36.00%

发文量

165

审稿时长

4-8 weeks

期刊介绍： Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.