Researches were made on the effect of anionic, non-ionic surfactants and their formulated pro_ ducts as well as process conditions such as pH, sequesters and add-in methods on high temperature dispersibility of mixed disperse dyes.

Disperse Blue 79 before and after subject to high temperature treatment, usually as an indication for their high temperature dispersion stability, was measured by Laser Size Analyzer KS 13320.

In this paper the change of average particle sizes of disperse dyes before and after subjecting to high temperature treatment,which usually indicates their high temperature dispersion stability,was measured by Laser Size Analyzer KS13320.

Due to its strong anti-temperature capacity,it can prevent effectively high-temperature dispersion and high-tempera- ture thickening,thus fitting to be used in deep well and areas with high temperature and pressure.

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.