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Production method of extrusion roller including high-speed steel

A production method and extrusion roll technology, which is applied in the field of high-speed steel, can solve problems such as roll surface wear, easy peeling, and poor roundness, and achieve the effects of simple heat treatment process, reduced brittle crack tendency, and reduced production costs

Active Publication Date: 2013-05-15
TIANJIN CEMENT IND DESIGN & RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) The wear resistance of the extrusion roller surface is not high
[0004] The thickness of the wear-resistant layer and pattern layer on the surface of the extrusion roller is generally 6-9mm. When encountering materials with high silicon content, the wear of the roller surface is relatively serious, which affects the service life of the extrusion roller.
[0005] 2) Extrusion roller surface peeling off
[0006] Since the wear-resistant layer and the pattern layer have more cracks after surfacing, and welding defects are prone to occur on the joint surface between the surfacing layers of different components, it is easy to cause peeling during use.
[0007] 3) Poor roundness of extrusion roller
[0008] Since the wear resistance of the squeeze roller is improved by surfacing, the hardness after welding is as high as HRC60, and the roller surface is not processed, so the roundness of the squeeze roller is controlled by the height of the surfacing layer, and the level of technical requirements for workers High, easy to cause poor roundness
[0009] 4) Squeeze roller damages a lot
However, both of the above two patents have the disadvantages of high content of precious alloy elements and high production costs.

Method used

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  • Production method of extrusion roller including high-speed steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A squeeze roller, comprising a roller shaft 3 and a composite roller sleeve fixed on it by interference fit, the composite roller sleeve is provided with two layers inside and outside, and the inner layer 2 of the composite roller sleeve is made of graphite steel to form a composite roller sleeve The graphite steel composition of the inner layer 2 is (weight%): 1.1C, 1.4Si, 0.7Mn, 0.02P, 0.02S, and the balance is Fe; the outer layer 1 of the composite roll sleeve is made of high-speed steel, and is made of a composite roll sleeve The high-speed steel composition of the outer layer 1 is (weight%): 1.2C, 0.4Si, 0.7Mn, 3.2Cr, 0.6Ni, 2.8Mo, 1.9V, 1.1W, and the rest is Fe. Pattern for increasing feeding friction.

[0038] The production method of above-mentioned extrusion roller:

[0039] 1) The outer layer material and the inner layer material of the composite roller sleeve are respectively melted in an intermediate frequency induction furnace;

[0040] 2) The smelted com...

Embodiment 2

[0048] The difference with Example 1 is:

[0049] 1) The high-speed steel composition of the outer layer of the composite roller sleeve is (weight%): 1.0C, 0.3Si, 0.8Mn, 3.8Cr, 1.0Ni, 2.0Mo, 2.5V, 0.5W, and the rest is Fe. The composition of the graphite steel in the inner layer is (% by weight): 1.3C, 2.0Si, 0.5Mn, 0.02P, 0.02S, and the balance is Fe.

[0050] 2) The pouring temperature of the outer layer material of the composite roller sleeve is 1400°C, and the pouring temperature of the inner layer material is 1500°C.

[0051] 3) The heating rate for the first tempering is 20°C / h, the heating temperature is 500°C, and the temperature is kept for 6 hours. The heating rate of the second tempering is 20°C / h, the heating temperature is 240°C, and the temperature is kept for 6 hours.

[0052] 4) The outer diameter of the composite roller sleeve is F1200mm, the length is 800mm, the outer wall thickness is 80mm, and the inner wall thickness is 170mm.

[0053] 5) After testing, t...

Embodiment 3

[0056] The difference with Example 1 is:

[0057] 1) The high-speed steel composition of the outer layer of the composite roller sleeve is (weight%): 2.0C, 0.8Si, 1.0Mn, 2.0Cr, 0.5Ni, 4.0Mo, 3.0V, 0.5W, and the rest is Fe. The composition of the graphite steel in the inner layer is (% by weight): 1.0C, 1.4Si, 0.5Mn, 0.02P, 0.02S, and the balance is Fe.

[0058] 2) The pouring temperature of the outer layer material of the composite roller sleeve is 1500°C, and the pouring temperature of the inner layer material is 1470°C.

[0059] 3) The heating rate for the first tempering is 10°C / h, the heating temperature is 600°C, and the temperature is kept for 10 hours. The heating rate of the second tempering is 12°C / h, the heating temperature is 300°C, and the heat preservation is 8 hours.

[0060] 4) The outer diameter of the composite roller sleeve is F1200mm, the length is 800mm, the outer wall thickness is 50mm, and the inner wall thickness is 200mm.

[0061] 5) After testing, t...

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Abstract

The invention discloses high-speed steel. The high-speed steel comprises the following components in percentage by weight: 1.0 to 2.0 percent of C, 0.3 to 1.0 percent of Si, 0.3 to 1.0 percent of Mn, 2.0 to 5.0 percent of Cr, 0.5 to 1.0 percent of Ni, 2.0 to 4.0 percent of Mo, 1.0 to 3.0 percent of V, 0.5 to 1.5 percent of W, and the balance of Fe. The invention also discloses an extrusion rollercontaining the high-speed steel and a production method of the extrusion roller. The high-speed steel disclosed by the invention has low cost and good abrasion resistance; and according to the extrusion roller containing the high-speed steel and the production method of the extrusion roller, the problems of a surfacing extrusion roller in the prior art are solved.

Description

technical field [0001] The invention relates to a high-speed steel, an extrusion roll containing the high-speed steel and a production method thereof. Background technique [0002] Roller press is a new type of energy-saving grinding equipment developed in the mid-1980s. It has the characteristics of low energy consumption, high efficiency, small weight and low noise. The extrusion roller is an important part of the roller press. The material is powdery or crushed after passing through the 50-300Mpa high-pressure counter-roller. When manufacturing a new extrusion roller or repairing an old extrusion roller, it is generally surfacing on the roller surface. Impact-resistant and wear-resistant multi-layer surfacing layer and pattern, the pattern layer generally has several shapes of font, herringbone, and rhombus. Judging from the current use effect of extrusion rollers, there are mainly the following four problems: [0003] 1) The wear resistance of the extrusion roller surf...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/46C21D9/38C21D1/18B22D13/00B22D19/16B02C4/30
Inventor 边汉民赵怡德陈勇
Owner TIANJIN CEMENT IND DESIGN & RES INST
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