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Integral thermal treatment process for roller shell of high-pressure roller mill

A technology of integral heat treatment and heat treatment furnace, applied in the direction of heat treatment furnace, heat treatment equipment, manufacturing tools, etc., can solve the problems of high labor intensity, complicated operation, and many processes, and achieve the advantages of reducing labor intensity, simple equipment and reducing production cost. Effect

Active Publication Date: 2012-07-11
CITIC HEAVY INDUSTRIES CO LTD
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Problems solved by technology

At present, in order to achieve the treatment effect of external hardness and internal toughness, the main means are quenching and tempering pretreatment + power frequency induction hardening, quenching and tempering pretreatment + differential temperature quenching, quenching and tempering pretreatment + carburizing and quenching, etc., but these methods All require special special-purpose supporting equipment, which is expensive, has many procedures, complicated operation, high labor intensity and high cost

Method used

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  • Integral thermal treatment process for roller shell of high-pressure roller mill
  • Integral thermal treatment process for roller shell of high-pressure roller mill
  • Integral thermal treatment process for roller shell of high-pressure roller mill

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] combine figure 1 and figure 2 , a high-pressure roller mill roller sleeve whose material is 30Cr2Ni2Mo is taken as an example. The size of the design drawing of the roll sleeve is that the diameter of the outer circle is 1410mm, and the diameter of the inner hole is 820mm. The drawing requires the surface hardness of the roll sleeve to be HRC≥50. Hardness HRC35-40, depth of hardened layer > 30mm, inner hole and end face are not quenched. Its heat treatment process curve is as follows figure 2 As shown, the heat treatment process steps are as follows:

[0020] (1) Before heat treatment, the outer diameter of the high-pressure roller grinding roller sleeve workpiece is 5 mm, the inner hole diameter is 20 mm, and each end face is 5 mm;

[0021] (2) Put the contour sleeve 2 in the roller sleeve 3, fill the space between the inner hole of the ro...

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Abstract

The invention discloses an integral thermal treatment process for a roller shell of a high-pressure roller mill. The method comprises the following specific steps of: leaving allowances for the outer circle diameter, inner hole diameter and each end face of a roller shell workpiece; putting an equal-height sleeve into the roller shell, compacting between the inner hole of the roller shell and thesleeve as well as the inner hole of the sleeve with heat-preserving cotton, and arranging an upper cover plate and a lower cover plate on the upper end face and lower end face of the roller shell; putting the sleeve workpiece into a thermal treatment furnace through a hanger, and performing normalizing treatment; quenching; putting into water for cooling; charging in time after cooling, and tempering; and tempering, preserving heat, discharging, and cooling in the air. In the thermal treatment process, the process requirements of high hardness and wear resistance on the surface of the roller shell of the high-pressure roller mill as well as toughness of a core part can be met by only using the conventional thermal treatment equipment.

Description

technical field [0001] The invention belongs to the technical field of metal heat treatment technology, and relates to an overall heat treatment process of a roller sleeve of a high-pressure roller mill. Background technique [0002] The crushing process of materials in mining, metallurgy and other fields consumes a lot of energy. Due to the increasing shortage of energy, the cost of energy consumption continues to rise, and the issue of reducing consumption has attracted more and more attention. High-pressure roller mill is a high-efficiency and energy-saving crushing equipment developed in the mid-1980s abroad. It has the advantages of high single-machine output, long roller surface life, high operating rate, good reliability, and low unit energy consumption. fields such as mining. At present, there are still many problems to be solved urgently in the development and application of high pressure roller mill. The high-pressure roller is the key part of the equipment. The ...

Claims

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Application Information

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IPC IPC(8): C21D9/38
Inventor 于慎君刘晓珂陶凯代博杰李德福石如星郎庆斌殷立涛李光林乙丑席志永张峰聂新林陈艳芳于文平
Owner CITIC HEAVY INDUSTRIES CO LTD
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