A heat treatment method for non-ferrous metal hot roll

A heat treatment method and non-ferrous metal technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of product strength, wear resistance, low toughness, etc., and achieve shortened quenching time, uniform grains, and excellent accident resistance Effect

Active Publication Date: 2019-01-22
安徽昕悦铸造科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the heat treatment of non-ferrous metal hot rolls has become particularly important. In order to further increase the service life of hot rolls and reduce the production cost of hot-rolled products, it is necessary to further improve and optimize the composition and processing technology of hot rolls. The problem of low product strength, wear resistance and toughness due to insufficient cooling is a common problem in heat treatment work, and the two are contradictory, and it is difficult to take care of them at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A heat treatment method for non-ferrous metal hot rolls, according to the following steps:

[0025] (1) Preheating: After the roll is demolded and sanded, the roll is transported to a high-temperature furnace for preheating. The preheating temperature is 360℃, the heating rate is 10℃ / min, and the preheating time is 20min;

[0026] The chemical composition and weight percentage of the above-mentioned roll are C: 0.60%, Si: 0.50%, Mn: 0.40%, Cr: 2.40%, Ni: 0.30%, Ti: 0.80%, Nb: 0.20%, P≤ 0.030%, S≤0.025%, the rest is Fe and unavoidable impurities;

[0027] (2) Second normalizing: transport the preheated rolls to the trolley-type normalizing furnace for normalizing treatment, the first normalizing is heated to 560℃, the temperature is kept for 1h, and then air-cooled to 420℃ and the temperature is kept for 30min; Carry out the second normalizing, raise the temperature to 720°C at a heating rate of 10°C / min, keep it for 2h, then air-cool to 420°C and keep it for 25min;

[0028] (3...

Embodiment 2

[0032] A heat treatment method for non-ferrous metal hot rolls, according to the following steps:

[0033] (1) Preheating: After the roll is demolded and sanded, the roll is transported to a high-temperature furnace for preheating. The preheating temperature is 390℃, the heating rate is 15℃ / min, and the preheating time is 25min;

[0034] The chemical composition and weight percentage of the above-mentioned roll are C: 0.80%, Si: 0.60%, Mn: 0.50%, Cr: 2.80%, Ni: 0.40%, Ti: 0.90%, Nb: 0.30%, P≤ 0.025%, S≤0.020%, the rest is Fe and unavoidable impurities;

[0035] (2) Second normalizing: transport the preheated rolls to the trolley-type normalizing furnace for normalizing treatment, the first normalizing is heated to 570℃, kept for 1.2h, then air-cooled to 430℃, kept for 35min; again; The temperature is raised for the second normalizing, and the temperature is raised to 740°C at a heating rate of 15°C / min, and the temperature is kept for 2.2 hours, and then air-cooled to 430°C and kept...

Embodiment 3

[0040] A heat treatment method for non-ferrous metal hot rolls, according to the following steps:

[0041] (1) Preheating: After the roll is demolded and sanded, the roll is transported to a high-temperature furnace for preheating. The preheating temperature is 390℃, the heating rate is 15℃ / min, and the preheating time is 25min;

[0042] The chemical composition and weight percentage of the above-mentioned roll are C: 0.90%, Si: 0.70%, Mn: 0.60%, Cr: 3.10%, Ni: 0.50%, Ti: 1.00%, Nb: 0.40%, P≤ 0.020%, S≤0.015%, the rest is Fe and unavoidable impurities;

[0043] (2) Secondary normalizing; transport the preheated rolls to a trolley-type normalizing furnace for normalizing treatment, the first normalizing is heated to 580℃, the temperature is kept for 1.5h, and then air-cooled to 440℃ and the temperature is kept for 35min; again; Heat up for the second time normalizing, increase to 750°C at a heating rate of 15°C / min, hold for 2.5h, and then air-cool to 440°C and hold for 30min;

[0044...

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PUM

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Abstract

The invention discloses a heat treatment method of a non-ferrous metal hot roll, and relates to the technical field of metal processing. The method comprises the following steps: 1) preheating: the roll is placed in a high-temperature furnace for preheating treatment after being demolded and cleaned; 2) secondary normalization; 3) quenching: double-frequency induction quenching is performed on the working surface of the roll, and the cooling mode is a combination of oil cooling and air cooling; 4) tempering; 5) annealing. The heat treatment method of the non-ferrous metal hot roll is simple and feasible; the treated non-ferrous metal hot roll is high in strength and good in thermal cracking resistance and electrochemical corrosion resistance, and has excellent accident resistance, fatigue resistance and abrasion resistance, thereby meeting operating requirements of practical production and application; the service life of the non-ferrous metal hot roll is effectively prolonged, and production efficiency and economic benefits are increased.

Description

Technical field [0001] The invention relates to the technical field of metal processing, in particular to a heat treatment method for a non-ferrous metal hot roll. Background technique [0002] The roll is an important part of the rolling mill in a rolling mill, and an important consumable part that determines the efficiency of the rolling mill and the quality of the rolled material. The roll uses the pressure generated by a pair or a set of rolls to roll the rolled piece, which causes the rolled piece to produce plastic deformation and obtain the ideal design shape. Therefore, the quality of the roll is directly related to the surface quality of the rolled product and the rolled steel The production operation rate of the machine. It mainly bears the effects of dynamic and static loads, wear and temperature changes during rolling. [0003] According to different working conditions, rolls are usually divided into cold rolls and hot rolls. Among them, hot rolls are usually used in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/38C21D1/28C21D1/18C21D1/26C22C38/02C22C38/04C22C38/50C22C38/48
CPCC21D1/18C21D1/26C21D1/28C21D9/38C22C38/02C22C38/04C22C38/48C22C38/50
Inventor 华玲玲
Owner 安徽昕悦铸造科技有限公司
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