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Heat treatment method of special-shaped forgings

A heat treatment method and technology for forgings, applied in the field of heat treatment, can solve problems such as inconsistent heating and cooling speeds, mechanical properties, and hardness values, and achieve the effects of reducing energy consumption, improving surface quality, and meeting use requirements

Inactive Publication Date: 2019-01-11
JIANGSU LEAP MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to meet such requirements in actual production, because the shape and thickness of forgings are different, and the heating and cooling speeds are inconsistent, resulting in inconsistent mechanical properties and hardness values ​​of various parts of forgings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A heat treatment method for special-shaped forgings, specifically comprising the following steps:

[0024] Step 1: After the special-shaped forgings are released from the furnace, they are air-cooled to room temperature, and then the forgings are first cleaned, polished, repaired, and re-coated with glass lubricant pretreatment, and then placed on the transfer device at equal distances to ensure that two adjacent special-shaped There is a certain gap between the forgings;

[0025] Step 2: The special-shaped forging is transported to the first station by the transfer device for primary heating. The first station is a heating furnace, and the special-shaped forging is heated to 480°C at a heating rate of 100°C / h and kept for 25min for 2.5h ;

[0026] Step 3: Continue to reheat the special-shaped forging obtained in step 2, and heat the special-shaped forging to 850°C at a heating rate of 100°C / h. When the temperature of each part of the forging is uniform, keep the tempe...

Embodiment 2

[0033] A heat treatment method for special-shaped forgings, specifically comprising the following steps:

[0034] Step 1: After the special-shaped forgings are released from the furnace, they are air-cooled to room temperature, and then the forgings are first cleaned, polished, repaired, and re-coated with glass lubricant pretreatment, and then placed on the transfer device at equal distances to ensure that two adjacent special-shaped There is a certain gap between the forgings;

[0035] Step 2: The special-shaped forging is transported to the first station by the transfer device for primary heating. The first station is a heating furnace, and the special-shaped forging is heated to 400°C at a heating rate of 80°C / h and kept for 30min for 3h;

[0036] Step 3: Continue to reheat the special-shaped forging obtained in step 2, and heat the special-shaped forging to 800°C at a heating rate of 80°C / h. When the temperature of each part of the forging is uniform, keep the temperature...

Embodiment 3

[0042] A heat treatment method for special-shaped forgings, specifically comprising the following steps:

[0043] Step 1: After the special-shaped forgings are released from the furnace, they are air-cooled to room temperature, and then the forgings are first cleaned, polished, repaired, and re-coated with glass lubricant pretreatment, and then placed on the transfer device at equal distances to ensure that two adjacent special-shaped There is a certain gap between the forgings;

[0044] Step 2: The special-shaped forging is transported to the first station by the transfer device for primary heating. The first station is a heating furnace, and the special-shaped forging is heated to 500°C at a heating rate of 150°C / h and kept for 25min for 2h;

[0045] Step 3: Continue to reheat the special-shaped forging obtained in step 2, and heat the special-shaped forging to 900°C at a heating rate of 150°C / h. When the temperature of each part of the forging is uniform, keep the temperatu...

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Abstract

The invention discloses a heat treatment method of special-shaped forgings. The heat treatment method of the special-shaped forgings comprises the following specific steps: (1) the special-shaped forgings are discharged from a furnace for air cooling to reach the room temperature, and then, are placed on a transfer device; (2) the special-shaped forgings are conveyed to a first station by the transfer device for primary heating; (3) the special-shaped forgings obtained in the step (2) are secondarily heated continuously; (4) the special-shaped forgings obtained in the step (3) are conveyed toa second station for quenching by the transfer device; and after quenching, the special-shaped forgings are taken out for air cooling; (5) the special-shaped forgings are conveyed to a third station for tempering by the transfer device; (6) the special-shaped forgings obtained in the step (5) are conveyed to a fourth station for water cooling by the transfer device; and (7) the cooled special-shaped forgings are conveyed to a fifth station by the transfer device for blow cooling and air cooling to reach the room temperature. The method can improve the rigidity, the hardness, the wear resistance, the fatigue strength and the toughness of steel to the greatest extent to meet different use requirements of various mechanical parts and tools.

Description

technical field [0001] The invention relates to a heat treatment, in particular to a heat treatment method for a special-shaped forging. Background technique [0002] In terms of heat treatment method: after heat treatment, the mechanical properties of forgings should be stable, and the hardness value of each part should be uniform and uniform. It is difficult to meet such requirements in actual production, because the shape and thickness of forgings are different, and the heating and cooling speeds are inconsistent, resulting in inconsistent mechanical properties and hardness values ​​of various parts of forgings. Therefore, in the process of heat treatment, the quality and performance have been fluctuating greatly, and each batch is different, which requires us to further improve and guarantee the heat treatment quality of this product. Contents of the invention [0003] In order to overcome the deficiencies in the technical background, the invention provides a heat tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/00C21D1/18C21D1/607
Inventor 蒋波何天成
Owner JIANGSU LEAP MACHINE
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