Hot-rolling work roll with micron-grade tungsten carbide enhancement layers and manufacturing method thereof

A technology of work rolls and tungsten carbide, which is applied in the direction of rolls, metal rolling, metal rolling, etc., can solve problems such as roll surface peeling, achieve the effect of not easy to fall off, improve surface strength and hardness, and simple preparation method

Active Publication Date: 2016-10-26
湖北广力轧辊有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a hot-rolled work roll with a micron-sized tungsten carbide reinforcement layer to solve the problem of peeling of the existing hot-rolled work roll under severe working conditions

Method used

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  • Hot-rolling work roll with micron-grade tungsten carbide enhancement layers and manufacturing method thereof
  • Hot-rolling work roll with micron-grade tungsten carbide enhancement layers and manufacturing method thereof
  • Hot-rolling work roll with micron-grade tungsten carbide enhancement layers and manufacturing method thereof

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Experimental program
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Effect test

preparation example Construction

[0032] The preparation method of above-mentioned hot rolling work roll specifically comprises the following steps:

[0033] Step 1: cleaning the surface of the hot-rolled work roll body with acetone to obtain a surface-treated hot-rolled work roll body;

[0034] Step 2: Use a laser drilling machine to carry out laser drilling on the surface-treated hot-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 hot-rolled work roll body with a concave tubular body;

[0035] Step 3: Put the cleaned hot-rolled work roll body with a depressed tubular body obtained in Step 2 into a vacuu...

Embodiment 1

[0049] Step 1: cleaning the surface of the hot-rolled work roll body with acetone to obtain a surface-treated hot-rolled work roll body;

[0050] Step 2: Using a laser drilling machine to laser drill holes on the surface-treated hot-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 until neutral, and finally ultrasonically cleaned with ethanol to obtain the cleaned hot-rolled work roll body with a depressed tubular body;

[0051] Step 3: Place the cleaned hot-rolled work roll body with the depressed tubular body obtained in step 2 in a vacuum carburizing furnace for carburizing at a temperature of 920° C., the carbon mass concentration in the vacuum carburizing furnace being 0.9%, The vacuum degree is not greater than 1×10 4 Pa, the carburizi...

Embodiment 2

[0055] Step 1: cleaning the surface of the hot-rolled work roll body with acetone to obtain a surface-treated hot-rolled work roll body;

[0056] Step 2: Use a laser drilling machine to perform laser drilling on the surface-treated hot-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 until neutral, and finally ultrasonically cleaned with acetone to obtain the cleaned hot-rolled work roll body with a depressed tubular body;

[0057] Step 3: Place the cleaned hot-rolled work roll body with a depressed tubular body obtained in step 2 in a vacuum carburizing furnace for carburizing at a temperature of 930° C. The carbon mass concentration in the vacuum carburizing furnace is 1.0%. The vacuum degree is not greater than 1×...

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Abstract

The invention discloses a hot-rolling work roll with micron-grade tungsten carbide enhancement layers. The hot-rolling work roll comprises a hot-rolling work roll body. The surface of the hot-rolling work roll body is provided with multiple sunken pipe-like bodies. The surface of the hot-rolling work roll body is provided with the micron-grade tungsten carbide enhancement layer. The inner surface of each pipe-like body is provided with one micron-grade tungsten carbide enhancement layer. According to the manufacturing method of the hot-rolling work roll, surface treatment is carried out on the hot-rolling work roll body; then laser drilling, acid pickling and ultrasonic cleaning are carried out; the cleaned hot-rolling work roll body with the sunken pipe-like bodies is subjected to carburizing in a vacuum carburizing furnace, and a composite body with the micron-grade tungsten carbide enhancement layers is obtained; finally, aftertreatment is carried out to obtain the hot-rolling work roll with the micron-grade tungsten carbide enhancement layers. The hot-rolling work roll solves the problem that roll surface spalling of an existing hot-rolling work roll occurs under the severe working condition, the overall mechanical property, the heat-resisting property and the wear-resisting property of the composite material are improved, and the manufacturing method is simple and easy to implement.

Description

technical field [0001] The invention belongs to the technical field of rolls, and in particular relates to a hot-rolled work roll with a micron-scale tungsten carbide reinforcement layer, and also relates to a preparation method of the hot-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. Hot-rolled work rolls are mainly subjected to dynamic and static loads during rolling at high temperatures. In addition to normal wear, the main failure mode is peeling of the roll surface. The main reason is the expansion of premature fatigue cracks. Therefore, hot rolling work rolls must have sufficient high temperature strength, uniform high hardness and good surface quality. [0003] In order to improve the surface wear resistance of hot-rolled work rolls, the material of hot-rolled work rolls has been continuous...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B27/02B23P15/00C23C8/22C21D9/38
CPCC21D9/38C23C8/22B21B27/021B23P15/00
Inventor 钟黎声王昕许云华赵梓源燕映霖陈利萍宋珂赵娜娜
Owner 湖北广力轧辊有限公司
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