Aimed at the question that 45# steel and 40Cr steels are used irrelevantly on any places, the tribological properties were discussed and contrasted between 45# steel and 40Cr on different heat treatment condition.

The Gleeble-1500 heat/mechanics moulding experimental setup was used to make hot compressive test on the 40Cr steel,the true stress-true strain curves at 710～1050℃ in a strain rate rang of 0.

The Gleeble-1500 heat/mechanics moulding experimental setup was used to make hot compressive test on the 40Cr steel,the grain character of 40Cr steel's hot deformed austenite at 710℃～1050℃,in a strain of 0.

The optimized process parameters were determined by the orthogonal test of nitrocarburizing under CO_2+NH_3 atmosphere for 40Cr and 42CrMoA steel crankshaft.

Residual stress release in quenched 40Cr steel under electropulsing;

Superfining Process of 40Cr Steel;

Microstructure and mechanical properties of 40Cr steel nano-crystallized surface after high energy peening;

Study on measures to reduce stress of brazing Ti(C,N)based cermets to steel 40Cr;

Effect of Horizontal Casting Process on Middle Crack ofΦ150 mm Tube Blank of Steel 40Cr

The welds seem to have similar strength to the basesteel 40Cr.

Hard alloy YG-8 was used as surface coating materials for U70MnSi steel,and FW-1101 welding electrode for 40Cr steel.

——The effect of the stress and hydrogen on the fracture toughness behavior of 40Cr steel in 3.