The microstructure mechanisms and mechanical properties of 0.23C-1.96Si-1.94Cr-1.93 Mn-0.35 Mo ultra-high strength steel treated by the deep cryogenic treatment at −196 °C were investigated after was hot rolled different temperatures. Experimental results show that austenitizing zone rolling with a large reduction in single pass can comprehensively enhance due to high volume retained austenite ...

In this study, the effect of austempering times on microstructures and mechanical properties dual-matrix structure austempered ductile iron (DMS-ADI) was investigated. With aim, unalloyed as-cast tensile samples were austenitized at 810 °C for 30 min to intercritical austenitizing followed by 350°C various (45 180 min). Experimental results showed that structures consisting proeutectoid ferrite...

The effect of molybdenum (Mo) contents on hardenability and precipitation behaviors in Mo-B simultaneously added steels were investigated placing a focus high austenitizing temperature. 0.5% Mo - 11 ppm B steel austenitized at 1150°C was decreased compared with that 950 °C, whereas 1.0% 10 1.5% 9 less affected by temperature than steel. Fe23(C, B)6 increasing also revealed to be suppressed – Th...

Although extensive aging and strain (bake hardening, BH) studies have been carried out on dual-phase steels, the behavior of dual matrix structure (DMS) ductile iron (DI), as a potential way to improve its mechanical properties, has not addressed until now. This research was designed study DI with ferrite-martensite structure. DMS-DI martensite volume fraction 30% produced by intercritical aust...

Simultaneously increasing the strength and ductility of hot work die steels is significant interest for broad applications. The in-situ development a nano-phase in promising method achieving this objective. However, little success has been reported so far. In study, trace amounts TiC nanoparticles were successfully introduced into high-Cr steel (HHD) through an innovative using nano-TiC/Al mast...

In this research, the three-body-type abrasive wear behavior of heat-treated multi-alloyed white cast irons, which has been used for work rolls in hot rolling stands, was investigated. Cast irons with varying C content from 1.73 to 2.34 mass% under 5 Cr, Mo, W, V each and 2 Co were prepared. After annealing, specimens hardened 1323 K 1373 austenitizing by fan air cooling. Hardened (As-H) temper...

The influence of heat treatment parameters on the carbide morphology powder metallurgic high-speed steel HS 6-5-3-8 is examined. To that end, diverse are selected and applied by quenching dilatometry. In particular, different austenitizing temperatures, as well an isothermal holding stage during in temperature regime transformation gap at temperatures between 450 600 °C, produced. Extensive com...