Seamless Steel Pipe Fire Control

Keywords:Seamless Steel Pipe Fire Control
Seamless steel pipe plant daily use is the result of a lot of post-processing procedures due to, anyway, there will be this kind of situation, the specific heat of the return process, the steel is heated to 750 degrees, the heat for some time, slowly cooled to 500 degrees, and finally cooling called annealing of the ball in the air. Aim is to reduce the hardness of steel, improve the cutting performance, mainly for high-carbon steel. The main purpose is to refine the organization normalizing seamless steel pipe to improve the performance of steel, get close to the equilibrium state of the organization.

The steel is heated to a temperature above the critical point (45 steel quenching temperature is 840-860 ℃, carbon tool steel quenching temperature is 760 ~ 780 ℃), to maintain a certain time, and then at an appropriate speed in water (oil ) was cooled to obtain a martensitic or bainitic heat treatment process called quenching.

kg / m㎡ unstable tempering member can not be determined, so the Japanese Industrial Standards (JIS) is also through tests to determine tensile properties above 400 ℃ temperature tempering member (there are 300 ℃ tempering the workpiece). In other words is reversed only quality pieces (+ 400 ℃ quenching and tempering) tensile test. In industry just asking the anti-rotating bending fatigue and abrasion resistance when using tempering member. Induction hardening and case hardening that is suitable for this case. Part tensile stress of not using low-temperature tempering. However, in low-carbon steel, but it can happen quenching and self-tempering M (Ms point so high), the user also in the quenched state. Requirements on all measures taken by steel and withdrawals are prepared well, is the result of specific measures to update the requirements of several quenching device, there is no sense of seamless steel tubes on the whole.
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