Study of Factors Affecting Quenching of High-Speed Steel M2
คำสำคัญ:
quenching, heat recovery, high speed steelบทคัดย่อ
The objective of this research was to study the factors in the Quenching process that affects the hardness and structure of the metal. With hardening and tempering the material at different temperatures and times. The material used in the experiment was High Speed Steel M2. The agent used to harden the metal were water, oil, and air. The experimental factors consisted of temperature for Quenching which was divided into 7 levels, namely, 1,000 ºC, 1,050 ºC, 1,100 ºC, 1,150 ºC, 1,200 ºC, 1,250 ºC and 1,300 ºC. The time required for quenching was 3 minutes, 3.5 minutes, 4 minutes, 4.5 minutes, 5 minutes, 5.5 minutes and 6 minutes. Based on the experimental study, it was found that temperature and time have a significant effect on the hardness of High-Speed Steel M2 at the significant level of 0.05. The most suitable factor is the use of an oil-based Coolant at a temperature of 1,150 ºC for 4.5 minutes which gives the highest hardness than other Coolant with the hardness of 55.62 HRC and a martensite interior structure
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