High speed steel composite roller heat treatment method

A heat treatment method and composite roll technology, which is applied in the field of steel rolling, can solve problems such as casting defects and reduce the strength of the bonding layer, and achieve the effects of short cycle time, high production efficiency, and low energy consumption
CN101215628AInactive Publication Date: 2008-07-09BEIJING UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
BEIJING UNIV OF TECH
Publication Date
2008-07-09
Estimated Expiration
Not applicable · inactive patent

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Abstract

A compound rolling heat treatment process of rapid-steel belongs to the steel rolling technology field. The invention comprises conducting annealing treatment for roller with 870-890 DEG C of annealing temperature, warming up for 6-10 hours, proceeding induction quenching on a 50Hz / 250Hz double-frequency quenching machine, preheating the roller before the induction quenching with 280-350 DEG C of preheating temperature for 6-10 hours of preheating warming. The roller is need being rotated and shifted down perpendicularly along axial direction when in quenching heating. The roller is water-cooled fast after heated up, then is conducted the first tempering treatment with 520-560 DEG C, and is insulated tempering for 4-6 hours, and then is cooled down in air. The roller is reheated to 500-540 DEG C to finish the second tempering treatment, and is insulated tempering for 6-8 hours, and is cooled down when the temperature of furnace is cooled smaller than 200 DEG C. The heat treatment technology of the invention treats high speed steel compound rolling, has simple technology, low energy consumption, short production cycle, high rolling strength and excellent use effect, and has excellent economic and social benefits after being popularized and applied.
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Description

technical field

[0001] The invention relates to a heat treatment method for rolls, in particular to a heat treatment method for high-speed steel composite rolls, and belongs to the technical field of steel rolling. Background technique

[0002] High-speed steel has high normal-temperature hardness due to its large amount of alloying elements such as W, Mo, Cr, V, and Co. What is particularly valuable is that compared with ordinary materials, high-speed steel has excellent red hardness, which remains at 500°C. HRC55 or higher, so it has excellent high temperature wear resistance, and has good effect when used to manufacture work rolls of hot rolling mills. Chinese invention patent CN1846887 discloses a high-speed steel composite roll and its manufacturing method. The high-speed steel composite roll of the invention is composed of a roll body and a roll core through centrifugal casting. The material of the roll body is high-carbon high-speed steel, mainly containing The weigh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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