Analysis Of the Effect of Vegetal and Coking Coals on the Surface Hardness of Carburized AISI 8620 Steel

IF 0.6 Q3 ENGINEERING, MULTIDISCIPLINARY

Enfoque UTE Pub Date : 2024-01-01 DOI:10.29019/enfoqueute.997

Leonidas Ramírez, Nicolás Rodríguez, Isaac Simbaña, David Saquinga

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Abstract

In this investigation, the comparative study of the superficial hardness of AISI 8620 steel thermally treated by carburizing, using vegetable and coking coals, was developed. The objective was to propose an alternative to the element used to generate the carburizing atmosphere. The previous stages have been described, such as the preparation of the material and its verification, as well as the dimensions and characteristics, defined by the ASTM E-18 standard. By considering four variables, each one with two levels, an orthogonal array matrix of 16 experiments was generated. The surface hardness measurements were processed through an analysis of variance (ANOVA), where the significance of each variable considered as a factor was obtained. Coking coal can be used as an element for the generation of carburizing atmosphere since a maximum relative error of 3.86 % was obtained between the experimental values and the values in the literature. In contrast, the vegetable coal did not improve the mechanical properties of the steel, reaching an average hardness of 25.95 HRC after heat treatments.

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分析植物煤和焦煤对渗碳 AISI 8620 钢表面硬度的影响

在这项调查中，对使用植物煤和焦煤进行渗碳热处理的 AISI 8620 钢的表面硬度进行了比较研究。目的是为产生渗碳气氛的元素提出一种替代方案。前面的阶段已经介绍过，如材料的制备和验证，以及 ASTM E-18 标准规定的尺寸和特性。通过考虑四个变量（每个变量有两个等级），产生了一个包含 16 个实验的正交阵列矩阵。通过方差分析（ANOVA）对表面硬度测量结果进行了处理，得出了每个变量作为一个因素的重要性。由于实验值与文献值之间的最大相对误差为 3.86%，因此焦煤可用作产生渗碳气氛的元素。相比之下，植物煤没有改善钢的机械性能，热处理后的平均硬度为 25.95 HRC。

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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Enfoque UTE ENGINEERING, MULTIDISCIPLINARY-

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