Metal Treatment with low temperature

In our country metal treatment and hardening is done by heating and quenching. I read some articles that metal treatment with low temperature application is very effective. There must me some one who had worked in such applications and it would be good idea to learn more on this, as this feild has a good business prospect. Can some one advice. I am attaching a pdf file on this subject for the members to study. Sorry could not upload the file as the size is more than what forum allows. Any one interested may contact me at samarjitsen@unirefeng.com..