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Heat treatment process for rolling mill guide alloy

An alloy and process technology, applied in the field of heat treatment of rolling mill guide and guard alloys, can solve problems such as cracks, wear and tear of guide roller materials, and achieve excellent toughness, elimination of sticking steel, and high strength and hardness.

Inactive Publication Date: 2013-10-30
宁波高智创新科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies in the prior art, one of the purposes of the present invention is to provide a heat treatment process for the guide alloy of a rolling mill, through which the alloy solves the frequent failure problems of traditional guide roll materials such as wear, cracks and fractures during service

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A heat treatment process for a rolling mill guide alloy, the guide alloy is composed of the following components in terms of weight percentage: C 1.1%, Cr 14%, Nb 0.5%, W 4.0%, Mo 2.0%, V 1.0%, Ti 2.0%, Ce 0.5%, Ni 4.0%, Si 1.5%, Mn 1.8%, Fe balance; according to the above alloy composition, scrap steel, sponge iron and the intermediate alloys of the corresponding components are smelted in an electric furnace, and the composition is adjusted before the furnace Afterwards, deoxidation and metamorphism treatment are carried out, and then the temperature is adjusted to 1530°C, ready for pouring. The model is made of gray iron. After heating at 220°C, the surface is painted with 1.0mm thick paint. After drying, the melted alloy is poured into the model, and then The cast slab is obtained after mold cooling, and the heat treatment process is as follows: the cast slab is subjected to solution treatment at 1180°C for 3 hours, then sprayed and cooled for 60 seconds, and then air...

Embodiment 2

[0016] A heat treatment process for a rolling mill guide alloy, the guide alloy is composed of the following components in terms of weight percentage: C 1.3%, Cr 12%, Nb 0.7%, W 2.0%, Mo 5.0%, V 0.5%, Ti 4.0%, Ce 0.3%, Ni 6.0%, Si 1.2%, Mn 2.2%, Fe balance; according to the above alloy composition, scrap steel, sponge iron and the intermediate alloys of the corresponding components are smelted in an electric furnace, and the composition is adjusted before the furnace After deoxidation and metamorphism, adjust the temperature to 1550°C and prepare for pouring. The model is made of gray iron. After heating at 200°C, paint the surface with a thickness of 1.5 mm. After drying, pour the smelted alloy into the model. The cast slab is obtained after mold cooling, and the heat treatment process is as follows: the cast slab is subjected to solution treatment at 1160°C for 5 hours, then sprayed and cooled for 30 seconds, and then air-cooled to below 200°C with a fan; then the alloy cast ...

Embodiment 3

[0018] A heat treatment process for a rolling mill guide alloy, the guide alloy is composed of the following components in terms of weight percentage: C 1.2%, Cr 13.0%, Nb 0.6%, W 3.0%, Mo 3.5%, V 0.8%, Ti 3.0%, Ce 0.4%, Ni 5.0%, Si 1.3%, Mn 2.0%, Fe balance; according to the above alloy composition, scrap steel, sponge iron and corresponding intermediate alloys of various components are smelted in an electric furnace, and the composition is adjusted before the furnace After deoxidation and deterioration treatment, adjust the temperature to 1540°C and prepare for pouring. The model is made of gray iron. After heating at 210°C, the surface is painted with 1.3mm thick paint. After drying, the melted alloy is poured into the model, and then The cast slab is obtained after mold cooling, and the heat treatment process is as follows: the cast slab is subjected to solution treatment at 1170°C for 4 hours, then sprayed and cooled for 45 seconds, and then air-cooled to below 200°C with ...

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Abstract

The invention discloses a heat treatment process for rolling mill guide alloy. The rolling mill guide alloy comprises the following components, by weight percentage, 1.1 to 1.3% of C, 12 to 14% of Cr, 0.5 to 0.7% of Nb, 2.0 to 4.0% of W, 2.0 to 5.0% of Mo, 0.5 to 1.0% of V, 2.0 to 4.0% of Ti, 0.3 to 0.5% of Ce, 4.0 to 6.0% of Ni, 1.2 to 1.5% of Si, 1.8 to 2.2% of Mn and the balance Fe. The heat treatment process includes that casting blank performs solution treatment at 1160 DEG C-1180 DEG C for 3-5 hours, cooled for 30-60 seconds by mist spray, air-cooled to below 200 DEG C by using a fan, heated at a temperature between 530 DEG C and 550 DEG C again, kept warm for 4-6 hours, and air-cooled to below 150 DEG C, heated at a temperature between 510 DEG C and 530 DEG C, kept warm for 4-6 hours, and cooled to normal temperature along with a furnace.

Description

technical field [0001] The invention relates to the field of metallurgical material processing, in particular to a heat treatment process for a rolling mill guide alloy. Background technique [0002] During the rolling process, the working environment of the guides (including the guide plates and guide rollers) at the steel import and export of the rolling mill is very harsh, and the red hot steel above 900°C passes through the guides continuously, and at the same time, it needs to be cooled by spraying water. , the temperature difference changes greatly and sharply. Therefore, the guide wears quickly, has a low service life, needs to be replaced frequently, consumes a lot, and is prone to cracks and breaks, which affects the production efficiency of steel rolling. In addition, the steel sticking phenomenon is easy to occur during the use of the guide and guard, which affects the quality of the rolled steel. The fundamental reason for sticking steel is that the guide and g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D6/00C22C38/58
Inventor 杨学焦
Owner 宁波高智创新科技开发有限公司
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