(Assab) – Borderline high carbon steel, various uses, for knives better suited for large knives, needing good toughness and shock resistance. Very low wear. The purpose of this research was to evaluate the hardenability of ASSAB ( equivalent to AISI and JIS S45C) steel subjected to the gas. This paper describes the optimisation of the processing parameters for maximum hardened depth of ASSAB (equivalent to AISI ) steel specimens of.
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Hardenability of ASSAB Steel during Tempering for Punch Holder Applications
Gas cementation is a heat treatment surface process by means of carbon diffusing into steel. This 706 is carried out in a furnace in a fluidized bed by using media of liquid petroleum gas LPG and nitrogen gas at a temperature of K and various holding times of 7.
The rapid quenching process is carried out in an oil media for sec. In order to remove the tension in the specimen, the tempering process is carried out in a furnace at a low temperature of K with holding time of 3.
The result shows that, the Vickers hardness values can be achieved from to HV. Therefore, it is confirmed that by using these processes, the hardening of ASSAB steel can be carried out and the punch holder can be manufactured.
Materials in World Perspective: Journal of Materials Processing Technology, Vol. Surface and Coatings Technology, Vol. Materials Science Forum, Vol. Journal of Magnetism and Magnetic Materials, Vol. Solid State Phenomena Volume Ghenadii Korotcenkov and Syed H. Seyed Majid Safi, M. In this paper, a modified up-quenching heat treatment method to the ASSAB M steel ultra high strength steel is proposed. A low alloy steel 0. The specimens, were cut from a bar with 25mm diameter and after achieving the best temperature and time of austenitizing, austenitized at for 60 min and followed by quenching at for the high austempering temperature to achieve the upper bainite morphology and at for the lower austempering temperature to achieve the lower bainite morphology.
In the case of successive austempering, the specimens were first austempered at for different periods sec and 60 sec and then austempered at for sec to achieve the mixed structure of upper bainite and lower bainite morphology. The specimens selected for up-quenching, after austenitization were quenched to below for sec. All of the processes were performed in the salt bath furnaces. Experimental results are presented and the advantages of the modified method are discussed.
As well, it is shown that the best combination of strength and ductility can be achieved by the proposed heat treatment method.
While, conventional heat treatment of ultra high strength steels UHSS cannot always meet the strict engineering requirements for improved strength and ductility simultaneously. It has been shown that the mixed structure of tempered martensite and lower bainite that has been suggested in this investigation offers a good sasab of strength and ductility.
The technical reason for this superiority returns back to the fact that it has increased dislocation density. As a result of the increment of the dislocation density, in the morphology, the 7600 lath carbide e.
This modified austempering is applicable to all the asdab high strength steels, has noticeable economic advantages because it is simple. Use of this modified austempering for heavy parts, leads to the lightness of heavy parts and combination 7600 the thermomechanical methods with this modified austempering can yield even much more improvements.
Experimental results showed that the microstructure of matrix had small needle structures after HIP treatment, which were effective in improving the hardness and strength.
Experimental results showed that the TRS of original V-4 steel powder was Beside, the hardness increased to HRA Furthermore, HIP treatment can improve the microstructure and mechanical properties of V-4 composite material. TRS of V-4 composite steel increased to The rapid quenching process is carried out in oil media for sec. The results shows, that remnant austenite is formed on the specimen with a holding time of 7.
Additionally, this gas cementation process when followed by the quenching process is effective in 76 the martensite and austenite microstructures.