THE EFFECT OF QUENCHING MEDIA VARIATIONS ON MICRO STRUCTURE AND VIOLENCE OF THE S45C STEEL STEEL WELDING RESULTS

Journal of Mechanical Engineering and Vocational Education (JoMEVE) Pub Date : 2019-07-03 DOI:10.20961/JOMEVE.V2I1.27328

Bagus Supriyadi Nur Haq

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Abstract

The purpose of this research is to find out the effect of current on microstructure and hardness value in S45C steel before (raw material) and after welding using Shielded Metal Arc Welding (SMAW). This research using experiment method. The Technique of data analysis using descriptive comparative research. The instruments that used for testing microstructure and hardness is Olympus Metallurgical Microscope and Vickers Hardness Tester. Based on the results of the research conclude that (1) the results of the microstructure testing showed the improved martensite structure after welding. In the raw material, martensite structure didn’t exist but the result of SMAW welding methods using quenching media of water, oil, and air that showed martensite structure was exist. (2) The hardness value of raw material is 232 VHN. The specimen with water media had highest average hardness value that is 411 VHN, oil media had average hardness value that is 308 VHN, air media had lowest average hardness value that is 263 VHN. This research showed that the result of SMAW welding using varying quenching media can changed the microstructure and hardness of S45C steel.

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淬火介质的变化对s45c钢的显微组织和焊接效果的影响

本研究的目的是找出电流对S45C钢在(原料)焊接前和焊接后的显微组织和硬度值的影响。本研究采用实验方法。使用描述性比较研究的数据分析技术。用于显微组织和硬度测试的仪器是奥林巴斯金相显微镜和维氏硬度计。根据研究结果得出:(1)显微组织测试结果表明，焊接后的马氏体组织得到改善。原料中不存在马氏体组织，但采用水、油、空气等淬火介质进行SMAW焊接的结果表明存在马氏体组织。(2)原料硬度值为232 VHN。水介质的平均硬度值最高，为411 VHN，油介质的平均硬度值为308 VHN，空气介质的平均硬度值最低，为263 VHN。研究表明，不同淬火介质的SMAW焊接可以改变S45C钢的显微组织和硬度。

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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Journal of Mechanical Engineering and Vocational Education (JoMEVE)

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