Analisa Pengaruh Parameter Proses Heat Treatment Terhadap Perubahan Nilai Kekerasan Pahat Bubut HSS M35
Keywords:
HSS M35, ASTM E92, heat treatment, VickersAbstract
Lathes are not only used in the industrial world, they are also used in learning and practical processes. The lathe itself has a chisel blade that is in direct contact with the workpiece being cut. When the chisel bit is worn out, it is thrown away unused, even though if the hardness value is known, it can still be used for other machining needs. From this incident, research was carried out to find out what the hardness value of the material was and a heat treatment test was carried out to find out how much the material hardness value changed. The analysis of variance (ANOVA) method used uses temperature parameters in degrees Celsius and cooling media in the heat treatment process: water cooling media with temperature variations of 900, 950, 1000 and holding time of 30 minutes, oil cooling media with temperature variations of 900, 950, 1000 and holding time 30 minutes. In this research, hardness testing was carried out using ASTM E92. The material used in testing was HSS M35 lathe chisels. All specimens that have been heat treated are then tested for Vickers hardness based on ASTM E92. From this research it can be concluded that the material experienced a change in hardness value, namely the average hardness value before heat treatment was 764.7 HV to 436.25 HV, while the percentage change in hardness value was 42.9%. Calculations using the analysis of variance (ANOVA) method showed that the heat treatment process parameters that had an influence were the temperature parameters with a percentage value of 30.9%, while the cooling media parameters only had an influence of 1.54%.
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