This study consists of the experimental and numerical analysis phase transformations 5Cr-0.5Mo.0.1C steel after heat treatment. The microstructure as-received comprised ferrite bainite, which is in agreement with microconstituents predicted by Calphad-calculated TTT diagram. Calphad-based precipitation calculations show that cooling stage normalizing treatment did not cause carbide formation. I...

Abstract The paper covers a study consisting on the implementation of electron beam welding process two steel grades: 39CrMoV13 and M50NiL. was carried out for values debunching, obtaining joint having different widths. Then, samples, after each variant, heat treatment double tempering at 520 °C 3 h, single freezing − 84 combined with h. impact parameters subsequent mechanical properties micros...

The mechanical improvement and "self-protection" properties are mainly needed to develop weather-resistant steel materials. In this study, A588 was given thermomechanical treatment (hot-rolling) followed by a quench-tempering process. is modified adding 1, 2, 3 wt% nickel the primary alloy. Steel made using hot rolling process at 750 ℃ for 1 hour with 70% thickness reduction. sample heat-treate...

This research shows two new microalloyed steels with niobium (Nb) for railroad wheels (Nb1 and Nb2) applied on heavy haul transportation (load over 30 tons/axle). The have mixed microstructure composed of pearlite bainite (finished wheel rim section), another one martensite (black section removed machining) obtained by continuous cooling quenching heat treatment followed tempering. bainitic mar...

Tujuan penelitian untuk mengetahui pengaruh perlakuan panas (heat treatment) berupa pack carburizing terhadap kekerasan mikro permukaan (micro hardeness of surface), distribusi permukaan, perubahan struktur dan patahan spesimen sebelum sesudah pengerasan, serta efek kekuatan fatique dalam hal ini patah lelah (fatiqe failure). Spesimen terbuat dari baja karbon AISI 1020, dibentuk sesuai standar ...

Quality characteristics of frozen cylindrical pork loin were evaluated following different tempering methods: 27.12 MHz curved-electrode radio frequency (RF) at 1000 and 1500 W, and forced-air convection (FC) or water immersion (WI) at 4°C and 20°C. The developed RF tempering system with the newly designed curved-electrode achieved relatively uniform tempering compared to a parallel-plate RF sy...

In this paper we demonstrate that tempering Markov chain Monte Carlo samplers for Bayesian models by recursively subsampling observations without replacement can improve the performance of baseline samplers in terms of effective sample size per computation. We present two tempering by subsampling algorithms, subsampled parallel tempering and subsampled tempered transitions. We provide an asympt...

This paper wants to know the effect of bending radius on distribution hardness, grain and microstructure surface area tensile stress compressive after bending, quenching tempering. Material testing helps determine analyze material quality. The research was conducted Hot Rolled Plate Steel with a 50 mm, 55 60 65 mm 70 measurement distance 1 2 3 highest value obtained at mm. After getting quench-...

To analyze the effects of intercritical heat treatment on temper embrittlement SA508 Gr.4N steels, two model alloys with different phosphorus (P) contents were fabricated. Each sample was treated by applying a conventional process (quenching-tempering) with/without an (IHT) and step-cooling for embrittlement. Then their microstructure mechanical properties evaluated. The alloy composed tempered...