Laser-based phase transformation hardening (LPTH), based on rapid heating and cooling cycles produces hard and wear-resistant layers only at the selective region of the components. However, the bulk mass of the material’s core property is retained. The advantages of high power direct diode laser in comparison with other high power lasers (CO2 and Nd:YAG) have put this type of laser as a main he...

This research comprises a study of the effect of heat treatment on fatigue behavior of (A193-51T-B7) alloy steel. Two heat treatment processes were conducted, namely, annealing and quenching followed by tempering at 200C. All fatigue tests were carried out using a rotary bending machine with constant stress ratio, R=-1. The eddy current probe was used to measure the crack length propagation. Fr...

Cryogenic treatment can be used as a supplemental treatment that is performed on some tool steels between quenching and tempering as an effective method for decreasing retained austenite and increasing wear resistance. In this research, the effect of deep cryogenic treatment (DCT) on dimensional stability and mechanical properties of 80CrMo12 5 tool steel was investigated. The martensitic trans...

The aim of this research is the reactivation secondhand ((scrap)) steel compression springs, which used in one private plastic factory, by applying heat - treatment with three methods. 1- Quenching only. 2- and tempering. 3- Annealing , quenching tempering.Were doing under supply conditions. microstructures inspected for specimen from any model 500 X. hardness tests springs have done before aft...

heating and sudden cooling are among the most important processes affecting temper quality in the production period of tempered auto glass. in this study, heat transfer characteristics and cooling times during the sudden cooling process of tempered glass production have been experimentally investigated. flat glass with dimensions of 50x50x4 mm has been heated up to 680 ºc in the furnace and was...

This work considers use neurofuzzy set theory for estimate abrasion wear resistance of steels based on chemical composition, heat treatment (austenitising temperature, quenchant and tempering temperature), hardness after hardening and different tempering temperature and volume loss of materials according to ASTM G 65-94. Testing of volume loss for the following group of materials as fuzzy data ...

The tempering response of CPM® 3V tool steel was investigated via a hardening and heat treatment, tensile testing, fractography, microstructural evaluation. is manufactured using Crucible Particle Metallurgy (CPM®), proprietary high-density sintering technique developed by Industries. treatments were applied to ASTM E8 standard test specimens. Tempering temperature the experimental variable. fo...

In this article boron steel is analyzed on the example of steel grade B27. In view of the fact that steel is supplied in a state after hot rolling, and the choice of a suitable heat treatment is left to the buyer steel were examined after conventional heat treatments. Steel was studied in state as delivered, after normalization, after quenching and after quenching and tempering at different tem...

cryogenic treatment can be used as a supplemental treatment that is performed on some tool steels between quenching and tempering as an effective method for decreasing retained austenite and increasing wear resistance. in this research, the effect of deep cryogenic treatment (dct) on dimensional stability and mechanical properties of 80crmo12 5 tool steel was investigated. the martensitic trans...