Interrupted quench process

Details Interrupted quench process Interrupted quench process

C - Chemistry, Metallurgy

21

D

148/50

C21D 9/14 (2006.01) C21D 1/19 (2006.01) C21D 9/08 (2006.01)

Patent

CA 1191077

ABSTRACT An improved method of hardening elongated steel pipe, to reduce or eliminate quench cracking, and to produce higher strength product from a given base material, comprises the steps of: quenching the pipe from an initial elevated temperature higher than the austenite transformation temperature, by immersion in a liquid cooling medium; controlling the flow of liquid cooling medium to produce a substantially uniform rate of cooling as between the inside and outside surfaces of the pipes; and interrupting the quenching process and withdrawing the pipe from the liquid cooling medium, not later than when the pipe has reached a temperature in the vicinity of the martensite start temperature. Following interruption of the quench process, the pipe may be promptly conveyed to a tempering furnace, without significant cooling, and tempered at a temperature higher than the martensite start temperature. Alternatively, following interruption of the quenching process, the pipe may be further cooled at a sufficiently slow and uniform rate to avoid quench cracking, and may subsequently be tempered in conventional fashion, if desired.

398334

Affiliated with

Also associated with

Rating

Interrupted quench process does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Interrupted quench process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interrupted quench process will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1266825