Thermochemical treatment of thin-walled structural steel element

Details Thermochemical treatment of thin-walled structural steel element Thermochemical treatment of thin-walled structural steel element

1995-03-13

1996-11-05

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Carburizing or nitriding using externally supplied carbon or...

148218, 148220, 148319, C22C 3800, C23C 832

Patent

active

055713416

ABSTRACT:
A process for the thermochemical treatment of thin-walled structural elements made of steel comprising enriching an edge zone of a thin-walled structural element with nitrogen and carbon at 590.degree. to 700.degree. C. to harden the edge zone whereby an intermediate layer (3) is formed in the diffusion zone (2), said intermediate layer comprising 1 to 3% by weight of nitrogen and at most 0.8% by weight of carbon and cooling the said thin-walled structural element under an inert atmosphere at a rate of 50.degree. to 100.degree. C. per minute to room temperature to form a nitrogen austenite and/or braunite phase between the connection layer (1) and the basic structure (4) with increased fatigue strength.

REFERENCES:
patent: 5252146 (1993-10-01), Wen et al.
Merriman, A Dictionary of Metallurgy, p. 23, 1958.

Affiliated with

Also associated with

Rating

Thermochemical treatment of thin-walled structural steel element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thermochemical treatment of thin-walled structural steel element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thermochemical treatment of thin-walled structural steel element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2012176