Title: Fast softening process for maraging steel
Application Number: 85100644 Application Date: 1985.04.01
Publication Number: 1000223 Publication Date: 1986.01.10
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C21D1/32
Applicant(s) Name: Anshan Iron Address:
Inventor(s) Name:
Attorney & Agent: LIU DONGXING
Abstract:
     This invention relates to a process for heating the hot-rolling state maraging steel,of which the original organization is martensite,to the temperature ac1 10-30 deg c followed with air-cooling,a microstructure of martensite distibuting on the ferrite matrix will be gained by employing the process.with repeating the same process again and again.the martensite island will be fined according to the megative exponent relation while the phass volume of ferrite matrix will extened in step style. so that the strength will be decreased and the elongation increased,to compare with the traditional high-temperature tempering process,this process will shorten softening time greatly and improve the softening effect.
Time: 6