Evaluating the Effect of Deep Cryogenic Heat Treatment on Microstructure, Wear and Tension Properties of the GOST9HF-Steel at Tempering Temperature from 150 to 650˚ C

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AMINI KAMRAN

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Journal: Journal of Advanced Processes in Materials Engineering Year:2020 | Volume:14 | Issue:2 Page(s): 51-66

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Title

Evaluating the Effect of Deep Cryogenic Heat Treatment on Microstructure, Wear and Tension Properties of the GOST9HF-Steel at Tempering Temperature from 150 to 650˚ C

Author(s)

AMINI KAMRAN | Issue Writer Certificate

Keywords

Deep Cryogenic TreatmentQ1

HardnessQ2

TemperingQ1

TemperatureQ2

MicrohardnessQ2

Abstract

In recent years, cryogenic-treatment is considered in order to improve of wear and Hardness resistance of tool steels. Cryo-treatment is performed on steel before and after of Tempering and quenching treatment, respectively. In this research, the effect of Deep Cryogenic Treatment is investigated on the GOS9HF-steel. In this regard, the quenched-tempered and quenched-Cryo-treated samples are prepared after Tempering treatment for 2hrs. then, impact of Cryo-treatment on value of retained austenite, fine carbide precipitations are evaluated by XRD, SEM and the amount of Hardness, strength and wear resistance are measured by micro-Hardness, tensile and wear tests. The wear test is conducted by pin-on-disc method. The results indicated that the amount of Hardness and properties of wear and tensile in the Cryo-treated sample were rather than the quenched-tempered samples at all of Tempering Temperatures (i. e. from 150 to 650˚ C). Additionally, with increase of Tempering Temperature, the amount of Hardness, wear behavior and tensile property are decreased in both of Cryo-treated and quenched-tempered samples. This can be attributed to the softening of microstructure and the growing of grain sizes. Moreover, it was obvious that improving of Cryo-treated samples are related to the removing of retained austenite, precipitation of fine carbides and more appropriate distribution of these carbides. It is cleared that the Cryo-treatment causes to decrease of value of retained austenite from 12% to below of 1% at quenched-tempered and Cryo-treated samples, respectively. Finally, Cryo-treatment causes to increase of volume fracture of carbides to 52%.

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APA: Copy

AMINI, KAMRAN. (2020). Evaluating the Effect of Deep Cryogenic Heat Treatment on Microstructure, Wear and Tension Properties of the GOST9HF-Steel at Tempering Temperature from 150 to 650˚ C. ADVANCED PROCESSES IN MATERIALS, 14(2 ), 51-66. SID. https://sid.ir/paper/380754/en

Vancouver: Copy

AMINI KAMRAN. Evaluating the Effect of Deep Cryogenic Heat Treatment on Microstructure, Wear and Tension Properties of the GOST9HF-Steel at Tempering Temperature from 150 to 650˚ C. ADVANCED PROCESSES IN MATERIALS[Internet]. 2020;14(2 ):51-66. Available from: https://sid.ir/paper/380754/en

IEEE: Copy

KAMRAN AMINI, “Evaluating the Effect of Deep Cryogenic Heat Treatment on Microstructure, Wear and Tension Properties of the GOST9HF-Steel at Tempering Temperature from 150 to 650˚ C,” ADVANCED PROCESSES IN MATERIALS, vol. 14, no. 2 , pp. 51–66, 2020, [Online]. Available: https://sid.ir/paper/380754/en

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