Wearable hot roll

A hot roll and body technology, applied in the field of wear-resistant hot rolls, can solve the problems of increased roll surface roughness, unreasonable process parameters, large roll consumption, etc., and achieves good lubrication effect and improves mechanical properties and chemical properties.

Inactive Publication Date: 2013-01-02
虞伯林
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the following problems often occur in existing hot rolls: 1. Cracks on the roll surface: cracks are divided into normal cracks and abnormal cracks. Normal cracks are also called thermal cracks, which are caused by thermal stress caused by multiple temperature cycles. Gradual cracking is a micro-surface layer phenomenon that occurs on the roll surface; abnormal cracks are thermal shock cracks caused by accidents such as slipping, sticking steel, jamming steel, stacking steel, and tailing during the rolling process. Cracks with a certain depth and elongation are formed locally on the surface; 2. Indentation: mainly refers to the indentation of foreign matter such as iron oxide scale due to cleaning reasons during the production process, resulting in continuous or discontinuous distribution of irregular shapes on the roller surface pits, etc.; 3. Oxidation film shedding: at the beginning of rolling, after a period of hot rolling, a layer of silver-gray or light blue thinner oxide film is formed on

Method used

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  • Wearable hot roll

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Example Embodiment

[0013] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to make a clearer and clearer definition of the protection scope of the present invention.

[0014] See figure 1 , The embodiment of the present invention includes:

[0015] A wear-resistant hot rolling roll includes a hot rolling roll body 1, the inner wall of the body 1 is provided with a water cooling layer 2, and the outer wall of the body 1 is coated with a tungsten carbide cemented carbide layer 3, the tungsten carbide cemented carbide layer 3 The outside is coated with a nano ceramic coating 4.

[0016] The thickness of the tungsten carbide cemented carbide layer 3 is 0.1-0.5 mm, and titanium carbide and tantalum carbide are added to the tungsten carbide cemented carbide layer 3. Because tungsten carbide is insoluble...

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Abstract

The invention discloses a wearable hot roll which comprises a hot roll body, wherein a water cooling layer is arranged on the internal wall of the body; and a tungsten carbide hard alloy layer coated with a nanometer ceramic coating outside is coated on the external wall of the body. According to the wearable hot roll, the tungsten carbide hard alloy layer is coated on the surface of the body, and the nanometer ceramic coating is coated outside the tungsten carbide hard alloy layer, so the wearable hot roll has the effect of heat insulating, has no falling and no burning, is waterproof and moisture-proof, and is good in effect of lubricating; the mechanical performance and the chemical performance of the hot roll are greatly improved; and meanwhile, good effect of cooling can be achieved via the water cooling layer, therefore, the longer service life can be ensured.

Description

technical field [0001] The invention relates to the field of hot rolls, in particular to a wear-resistant hot roll. Background technique [0002] The hot roll is an important part of the rolling mill, which uses the pressure generated by a pair or a set of rolls to roll the steel. However, the following problems often occur in existing hot rolls: 1. Cracks on the roll surface: cracks are divided into normal cracks and abnormal cracks. Normal cracks are also called thermal cracks, which are caused by thermal stress caused by multiple temperature cycles. Gradual cracking is a micro-surface layer phenomenon that occurs on the roll surface; abnormal cracks are thermal shock cracks caused by accidents such as slipping, sticking steel, jamming steel, stacking steel, and tailing during the rolling process. Cracks with a certain depth and elongation are formed locally on the surface; 2. Indentation: mainly refers to the indentation of foreign matter such as iron oxide scale due to ...

Claims

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Application Information

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IPC IPC(8): B21B27/02
Inventor 虞伯林
Owner 虞伯林
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