Views: 1 Author: Site Editor Publish Time: 2016-11-15 Origin: Site
The traditional mode of production lifting forgings hardened with a chain level into the water, causing the surface into the water to produce the large amount of steam does not discharge in time, form steam film, lead to forging the surface cooling rate.
The traditional mode of production
Quenching when lifting forgings with chains level into the water, causing the surface into the water after the large amount of steam produced does not discharge in time, the formation of steam film, lead to forging the surface cooling speed is slow, affect their performance in the end.And steam gathered more, vibration caused by forging, there is a big security risk.
Does not discharge in time, after steam generated by the dry steam gathered to form the membrane surface, played a protective effect of cooling in forging, severely reduces the cooling rate of forgings, caused by surface structures from ferrite content more, and some net-like.To meet the requirements of plate type forgings performance, we should solve the problem of the quenching cooling rate is not uniform.
Methods according to the characteristics of plate type forgings, utilizing the sling chain hanging in the shop after living forgings, decline in chains, crane to - delete off at the same time, will be forging lift again.At this point, the forging and heat treatment car level control is 30 to 45., after the end to sink into the water quenching.
Partial car lifting, forgings and car surface Angle should be < 45.If the Angle is too big to sliding chains and forgings, cause safety accidents, Angle is too small found in the practical application of steam discharge is stare, poor cooling effect.Should be controlled as far as possible in 30.~ 45.
Principle because of forgings at an Angle with the ground, after forging into the water, under the surface of steam resistance is reduced, and the water in the tank for circulating water (cycle. Small amount, the flow of water will be very easy to take away under the surface of the steam, thus improved the forging surface cooling speed, guarantees the forgings overall uniform cooling.
The quenching way, enhanced the plate type forgings surface cooling rate, cooling, ensure uniform forging parts eventually I company production of such large plate type forgings conditioning after all meet the technical requirements of various performance indicators, and forging parts performance index is evener, meet user needs.