Effect of EAF-VOD-VAR and VIM-VAR Metallurgical Process on Toughness of Ultra-high Strength Steel G50;

An ICP-AES method for determining Mn,Si,Al,Ti,Nb,La in ultrahigh strength steel is presented.

The heat-treatment of bainite and martensite isothermal quenching for 40CrNi2Si2MoVA ultrahigh strength steel was carried on.

The heat-treatment process of bainite isothermal quenching was studied on ultrahigh strength steel 40CrNi2Si2MoVA.

Microstructures and mechanical properties of ultra-high strength steel 300M fabricated by laser melting deposition;

Effect of morphology of MnS inclusions on impact toughness of ultra-high strength steel

Tensile behavior and fractography of two kinds of ultra-high strength steels

A new mechanics system combning with an acoustic emission (AE) set is designed to study the behavior of stress corrosion cracking (SCC) of a super high strength steel.

For the sake of ensuring mould and die to possess good heat dissipation effect in the course of hot punching,and of optimizing the cooling system design of the hot punch shaping mould and die of super high strength steel plate,the critical water flow speed in the cooling system of hot shaping mould and die was put forward.

The effects of quenching temperature and tempering temperature on the ratio of yield strength to tensile strength (yield ratio) in a medium carbon Cr-Ni-Mo ultra high strength steel have been investigated.

Based on the cutting experiments of dry milling ultra high strength steel with ceramic cutters, the relationship between cutting speed and cutter's lifespan, cutting force and surface roughness are investigated,and the empirical formulas of T - v and F z- v are established.

Applying the artificial neural network, the basic composition of Fe 9 5Ni Cr Mo C system has been optimized at first, and then other strengthening methods have been introduced, finally, a cobalt free secondary hardening ultra high strength steel has been developed, which is comparable with 9Ni 5Co steel in mechanical properties.