The high temperature diffusion can obviously improve the cold roll defect detected by ultrasonic flaw detector,the final forged process shall use the variable characteristic of the inclusion cracking to control the cracking defects.

Effects of predeformation diffusion annealing on distribution of alloy agents and structures;

Effects of diffusion annealing on dendritic structure,forging filamentary microstructure and impact toughness of Cr-Mo low alloy steel ingot were studied.

Experiment study on the influence of diffusion annealing before forging on mechanical property of low ally steel;