Tempering method

C - Chemistry – Metallurgy – 03 – B

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C03B 27/02 (2006.01) B32B 17/10 (2006.01)

Patent

CA 2213908

A method of tempering an article is disclosed in which an article is heated so that the material making up the article is in an essentially stress-free state and the article thereafter is quenched and cooled. At the conclusion of the quenching, a stress pattern in initiated through the thickness of the article in which the midplane layer is in tension and the surface layers are in compression. This stress pattern is further developed during the cooling stage. The article is quenched by spraying the surfaces with a coolant, preferably comprising either liquid nitrogen or liquid air in the form of a two phase flow of liquid and vapor. The liquid is sprayed so that the surface tensile stress of the surface layers are not exceeded and the liquid does not accumulate on the surface layers as a film.

Méthode pour tremper un objet dans laquelle l'objet est chauffé de manière que le matériau dont est fait l'objet soit dans un état essentiellement libre de toute contrainte et l'objet est ensuite éteint et refroidi. Quand prend fin l'extinction, un modèle de contrainte est induit dans l'épaisseur de l'objet dont la couche médiane est en tension et les couches de surface en compression. Ce modèle de contrainte est encore développé à l'étape du refroidissement. Pour éteindre l'objet trempé, on pulvérise un frigorigène sur ses surfaces, de préférence de l'azote liquide ou de l'air liquide sous forme d'un écoulement en deux phases de liquide et de vapeur. On pulvérise le liquide de façon que la contrainte de tension superficielle des couches de surface ne soit pas dépassée et que le liquide ne s'accumule pas sous forme de pellicule sur les couches de surface.

LandOfFree

Say what you really think

Search LandOfFree.com for Canadian inventors and patents. Rate them and share your experience with other people.

Rating

Tempering method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFCA-PAI-O-2082834

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.