Technical method for on-line medium frequency induction heat treatment of oil pipes
A technology for induction heat treatment and oil-specific pipes, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of large equipment investment, high energy consumption, and reduced investment in production equipment, so as to reduce investment, improve steel grades, reduce Effects of Energy Consumption and Air Pollution
Inactive Publication Date: 2009-12-30
湖北嘉裕钎具股份有限公司
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Problems solved by technology
[0004] In order to overcome the problems of large equipment investment, high energy consumption and serious environmental pollution in the existing process method, the present invention provides an on-line medium frequency induction heat treatment process method for petroleum special pipes, which uses medium frequency reheating computer to control temperature and flat oil (set) Pipe technology, which not only improves the steel grade of steel pipes, reduces consumption, eliminates air pollution, but also reduces investment in production equipment
Method used
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Experimental program
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Effect test
Embodiment Construction
[0007] After the tube blank is heated, pierced and rolled to sizing, it is quenched by medium frequency induction heating to AC3+20-30 degrees Celsius quenching machine, and then tempered in a step-by-step heat treatment furnace to produce 80 and 110 steel grade oil (sleeve) pipes.
[0008] The technological process is: tube cutting - heating - piercing - pipe rolling - sizing - medium frequency induction heating to AC3+20-30 degrees Celsius quenching machine quenching - stepping heat treatment furnace tempering - performance and Organizational inspection—appearance quality inspection—passage—hydraulic test—nondestructive testing—packaging and storage.
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The invention relates to a technical method for the on-line medium frequency induction heat treatment of oil pipes. The technology of the invention uses medium frequency induction heating and computer temperature control to adjust the temperature of steel pipes which are sized and rolled to 20 to 30 DEG C above AC3 to quench the steel pipes in a quenching machine and temper the steel pipes to produce the oil pipe of high steel grade. The technology for the on-line medium frequency induction heat treatment of the oil pipe ensures the production of steel pipes having mechanical performance, a metallographic structure and a grain size like those of high steel grades such as N80 and P110, saves investment, reduces consumption, avoids atmosphere pollution and has high economic value and creates social benefits.
Description
Technical field [0001] The invention relates to a heat treatment process method, in particular to an on-line intermediate frequency induction heat treatment process method for oil special pipes. Background technique [0002] The invention relates to a new process technology of medium-frequency reheating computer temperature control and flat oil (casing) pipe that can improve the steel grade of steel pipes, reduce consumption and eliminate air pollution, which belongs to the invention technology. [0003] At present, the production of steel pipes of steel grades above J55 and K55 at home and abroad generally adopts the process of quenching and tempering after cooling the hot-rolled pipes. This method will invest in the construction of two walking heating furnaces, and will consume a large amount of heating medium in the heat treatment process. Even if this process is improved, the steel pipe is quenched and tempered after sizing rolling, only the waste heat after rolling is ...
Claims
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Login to View More IPC IPC(8): C21D9/08C21D1/18
Inventor 刘和生饶建华周志专周宝生镇海胜
Owner 湖北嘉裕钎具股份有限公司