Effect of Normalizing and Hardening on Mechanical Properties of Spring
Effect of Normalizing and Hardening on Mechanical Properties of Spring作者机构：Mechanical Engineering Department College of Engineering Federal University of Agriculture Abeokuta Abeokuta Ogun State Nigeria
出 版 物：《Journal of Minerals and Materials Characterization and Engineering》 (矿物质和材料特性和工程（英文）)
年 卷 期：2012年第11卷第8期
页 面：832-835页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Normalizing Hardening Tempering Impact Toughness Tension Spring
摘 要：This study was carried out to investigate the effect of heat treatment (Normalizing and Hardening) on the mechanical properties of springs. The springs were made from mild steel rod having a diameter of 6 mm, a total of 15 springs were made. The springs were then subjected to various heat treatment processes which included;normalizing, hardening and tempering. The heat treated springs were then subjected to various test in other to determine their mechanical properties, these included;impact toughness test, hardness test and tension test. The normalized spring had more strength, was harder and was much tougher than both the annealed and as received springs. The water quenched springs were the hardest of all the heat treated springs, were very brittle and had the lowest percentage elongation. Their strength was also lower than that of the normalized and as received springs. The water quenched and tempered springs had better mechanical properties required for spring making, they had the optimum combination of hardness, strength and toughness when compared with the other heat treated springs.
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