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A kind of cold rolling work roll with chromium carbide reinforced layer and its preparation method

A cold-rolled work roll, chromium carbide technology, applied in the direction of roll, metal rolling, metal rolling, etc., can solve the problem of roll surface peeling, achieve the effect of not easy to fall off, easy to implement, and solve the problem of roll surface peeling

Active Publication Date: 2018-09-21
神木中科新星复合材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a cold-rolled work roll with a chromium carbide reinforcement layer to solve the problem of peeling of the existing high-chromium alloy steel cold-rolled work roll under severe working conditions

Method used

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  • A kind of cold rolling work roll with chromium carbide reinforced layer and its preparation method
  • A kind of cold rolling work roll with chromium carbide reinforced layer and its preparation method
  • A kind of cold rolling work roll with chromium carbide reinforced layer and its preparation method

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Effect test

preparation example Construction

[0028] The preparation method of above-mentioned cold rolling work roll specifically comprises the following steps:

[0029] Step 1: cleaning the surface of the cold-rolled work roll body with acetone to obtain a surface-treated cold-rolled work roll body;

[0030] Step 2: Use a laser drilling machine to carry out laser drilling on the surface-treated cold-rolled work roll body obtained in step 1 under vacuum conditions or under the protection of an inert gas, and then carry out pickling. The acid solution used for pickling has a volume concentration of 300ml / L of hydrochloric acid, 60ml / L of phosphoric acid, 120ml / L of hydrogen peroxide, 300ml / L of hydrofluoric acid or 200ml / L of sulfuric acid, then rinse with water until neutral, and finally use ethanol or acetone Ultrasonic cleaning to obtain the cleaned cold-rolled work roll body with a concave tubular body;

[0031] Step 3: Place the cleaned cold-rolled work roll body with a depressed tubular body obtained in step 2 in a...

Embodiment 1

[0046] Step 1: cleaning the surface of the cold-rolled work roll body with acetone to obtain a surface-treated cold-rolled work roll body;

[0047] Step 2: using a laser drilling machine to laser drill the surface-treated cold-rolled work roll body obtained in step 1 under vacuum conditions, the hole diameter is 30 μm, the hole depth is 20 μm, and the hole spacing is 1000 μm; then pickling, The acid solution used for pickling is hydrochloric acid with a volume concentration of 300ml / L, then rinsed with water to neutrality, and finally uses ethanol to perform ultrasonic cleaning to obtain the cold-rolled work roll body with a depressed tubular body after cleaning;

[0048] Step 3: Place the cleaned cold-rolled work roll body with the depressed tubular body obtained in step 2 in a vacuum carburizing furnace for carburizing at a temperature of 900° C., and the carbon mass concentration in the vacuum carburizing furnace is 0.9%. The vacuum degree is not greater than 1×104Pa, the c...

Embodiment 2

[0052] Step 1: cleaning the surface of the cold-rolled work roll body with acetone to obtain a surface-treated cold-rolled work roll body;

[0053] Step 2: Use a laser drilling machine to perform laser drilling on the surface-treated cold-rolled work roll body obtained in step 1 under the protection of inert gas argon, with a hole diameter of 20 μm, a hole depth of 18 μm, and a hole spacing of 25 μm; and then carry out Pickling, the acid solution used for pickling is hydrofluoric acid with a volume concentration of 300ml / L, then rinsed with water to neutrality, and finally ultrasonically cleaned with acetone to obtain the cold-rolled work roll body with a depressed tubular body after cleaning;

[0054] Step 3: Place the cleaned cold-rolled work roll body with the depressed tubular body obtained in step 2 in a vacuum carburizing furnace for carburizing at a temperature of 850° C. The carbon mass concentration in the vacuum carburizing furnace is 1.0%. The vacuum degree is not g...

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Abstract

The invention belongs to the technical field of cold-rolled rolls, and particularly discloses a cold-rolled work roll with chromium carbide enhancement layers and a preparation method of the cold-rolled work roll. A cold-rolled work roll body is made of high-chrome alloy steel; a plurality of concaved tubular bodies are arranged on the surface of the body; and the chromium carbide enhancement layers are arranged on the surface of the cold-rolled work roll body and the inner surfaces of the tubular bodies. The preparation method of the cold-rolled work roll comprises the steps that a substrate is subjected to surface treatment; then laser drilling, acid pickling and ultrasonic cleaning are conducted; the cleaned substrate with the concaved tubular bodies is subjected to carburization in a vacuum carburizing furnace, and a composite body with the chromium carbide enhancement layers is obtained; and finally aftertreatment is conducted to obtain the cold-rolled work roll with the chromium carbide enhancement layers. The surface strength and hardness of an existing cold-rolled work roll are improved, heat resistance and abrasion resistance of the composite material are improved, the problem of peeling off of the roll surface of the cold-rolled work roll is solved, and the preparation method is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of cold-rolled rolls, and in particular relates to a cold-rolled work roll with a chromium carbide reinforcing layer, and also relates to a preparation method of the cold-rolled work roll. Background technique [0002] The roll is an important part of the rolling mill. The pressure generated by a pair or a group of rolls is used to roll the steel to realize the production of plates and strips. Commonly used cold-rolled work roll materials include alloy forged steel, alloy cast steel and cast iron. Cast iron rolls have high hardness, smooth surface and wear resistance, simple preparation process and low price, but their low strength can no longer meet the needs of automatic production. Steel rolls made of high-chromium alloy steel, such as 9Cr, 9Cr2, 9CrV, and 8CrMoV, have become the mainstream material for cold-rolled work rolls. Cold-rolled work rolls are mainly subjected to dynamic and static loads durin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B27/02C21D1/18C21D9/38C23C8/22
CPCB21B27/02B21B2267/26C21D1/18C21D9/38C23C8/22
Inventor 钟黎声王昕许云华赵梓源燕映霖陈利萍沈柳柳赵娜娜
Owner 神木中科新星复合材料技术有限公司
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