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Thermal treatment technology of high-temperature alloy for mill guide and guard

A high-temperature alloy and process technology, which is applied in the field of metallurgical material processing, can solve problems such as failure, guide material wear, crack fracture, etc., and achieve the effect of long-lasting life improvement, excellent thermal fatigue performance, and change of structure

Inactive Publication Date: 2014-03-26
WUXI XINDAZHONG STEEL SHEET
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 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 superalloys to solve the frequent failure problems of traditional guide materials such as wear, cracks and fractures during service

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A heat treatment process of a superalloy, the superalloy is composed of the following components by weight percentage: C 0.3, Cr 18.0, Al 0.5, Co 3.5, Nb 1.5, W 7.0, Mo 6.0, V 0.7, B 0.05, Ce 0.7 , Fe 5.0, Ni balance, the steps of the heat treatment process are as follows:

[0017] (1) Raise the temperature to 1270°C at a heating rate of 60°C / min, keep the temperature for 3h, and air-cool to room temperature;

[0018] (2) heating up to 1120°C at a heating rate of 60°C / min, holding for 8h, and cooling to room temperature in air;

[0019] (3) The temperature was raised to 930°C at a heating rate of 30°C / min, kept for 12 hours, and air-cooled to room temperature.

Embodiment 2

[0021] A heat treatment process of a superalloy, the superalloy is composed of the following components by weight percentage: C 0.5, Cr 16.0, Al 1.5, Co 1.5, Nb 2.5, W 5.0, Mo 8.0, V 0.3, B 0.1, Ce 0.5 , Fe 7.0, Ni balance, the steps of the heat treatment process are as follows:

[0022] (1) Raise the temperature to 1250°C at a heating rate of 90°C / min, keep the temperature for 5h, and air-cool to room temperature;

[0023] (2) heating up to 1100°C at a heating rate of 90°C / min, holding for 10h, and cooling to room temperature in air;

[0024] (3) The temperature was raised to 910°C at a heating rate of 60°C / min, maintained for 14 hours, and air-cooled to room temperature.

Embodiment 3

[0026] A heat treatment process of a superalloy, the superalloy is composed of the following components by weight percentage: C 0.4, Cr 17.0, Al 1.0, Co 2.5, Nb 2.0, W 6.0, Mo 7.0, V 0.5, B 0.08, Ce 0.6 , Fe 6.0, Ni balance, the steps of the heat treatment process are as follows:

[0027] (1) Raise the temperature to 1260°C at a heating rate of 75°C / min, keep the temperature for 4h, and air-cool to room temperature;

[0028] (2) raise the temperature to 1110°C at a heating rate of 75°C / min, keep the temperature for 9h, and air-cool to room temperature;

[0029] (3) The temperature was raised to 920°C at a heating rate of 45°C / min, maintained for 13 hours, and air-cooled to room temperature.

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Abstract

The invention discloses a thermal treatment technology of a high-temperature alloy for mill guide and guard. The thermal treatment technology is characterized in that the high-temperature alloy comprises the following components by weight percent: 0.3-0.5% of C, 16.0-18.0% of Cr, 0.5-1.5% of Al, 1.5-3.5% of Co, 1.5-2.5% of Nb, 5.0-7.0% of W, 6.0-8.0% of Mo, 0.3-0.7% of V, 0.05-0.1% of B, 0.5-0.7% of Ce, 5.0-7.0% of Fe and the balance of Ni. The thermal treatment technology comprises the following steps: (1) warming to 1250-1270 DEG C at the heating rate of 60-90 DEG C / min, keeping warm for 3-5 hours, and air cooling to room temperature; (2) warming to 1100-1120 DEG C at the heating rate of 60-90 DEG C / min, keeping warm for 8-10 hours, and air cooling to room temperature; and (3) warming to 910-930 DEG C at the heating rate of 30-60 DEG C / min, keeping warm for 12-14 hours, and air cooling to room temperature.

Description

technical field [0001] The invention relates to the technical field of metallurgical material processing, in particular to a heat treatment process of a superalloy. Background technique [0002] The guide is an important part of the rolling mill, which is used to transport the profiles and wires into the rolling mill smoothly. As the rolling speed of the rolling mill increases, sliding guides are gradually replaced by rolling guides. Because of the complex working environment and the short service life of the guide, the guide has become the main consumable part on the high-speed wire rod mill. At present, there are three kinds of guide materials commonly used at home and abroad. The first is heat-resistant steel with austenite structure; the second is wear-resistant steel or wear-resistant cast iron with martensitic structure; the third is cemented carbide. Austenitic heat-resistant steel has good high temperature stability and toughness, but poor wear resistance and fast...

Claims

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Application Information

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IPC IPC(8): C22F1/10C22C19/05
Inventor 周明华
Owner WUXI XINDAZHONG STEEL SHEET
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