渗碳时间和渗碳温度对渗碳低碳钢力学性能的参数影响

K. Madu, A. E. Uyaelumuo
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引用次数: 9

摘要

多年来,对金属热处理过程中工艺参数的研究引起了人们的极大兴趣,但由于渗碳过程中参数的控制是一个复杂的问题,因此对表面硬化过程中工艺变量的研究相对较少。本研究主要研究了渗碳温度和渗碳时间对活性炭渗碳低碳钢在850、900和950℃,在渗碳温度下浸泡15和30分钟,在油中淬火,在550℃回火并保持60分钟的机械性能的参数影响。渗碳后,将收到的试样制成标准试样进行拉伸和冲击试验。渗碳处理后,对试样进行标准试验,根据试验数据计算试样的极限抗拉强度、工程应变、冲击强度、杨氏模量。测定了渗碳回火试样的壳、芯硬度。观察表明,渗碳工艺、渗碳温度和渗碳温度下的浸泡时间对低碳钢的力学性能有很大影响。结果表明:渗碳温度为900℃,然后油淬,550℃回火,力学性能达到最佳组合。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Parametric Effects of Carburization Time and Temperature on the Mechanical Properties of Carburized Mild Steel
The study of process parameters in metals during heat treatment has been of considerable interest for some years but there has been relatively little work on process variables during the surface hardening process since controlling parameters in carburization is a complex problem. This work focuses on the parametric effects of the carburizing temperature and time on the mechanical properties of mild steel carburized with activated carbon, at 850, 900 and 950 °C, soaked at the carburizing temperature for 15 and 30 minutes, quenched in oil, tempered at 550 °C and held for 60 minutes. Sequel to carburization process, standard test samples were prepared from the as received specimen for tensile and impact tests. After carburization process, the test samples were subjected to the standard test and from the data obtained, ultimate tensile strength, engineering strain, impact strength, Youngs’ moduli were calculated. The case and core hardness of the carburized tempered samples were measured. Observation shows that the mechanical properties of mild steels were found to be strongly influenced by the process of carburization, carburizing temperature and soaking time at carburizing temperature. It was concluded that the optimum combination of mechanical properties is obtained at the carburizing temperature of 900°C followed by oil quenching and tempering at 550 °C.
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