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A kind of heat treatment method of forging

A heat treatment method and forging technology, applied in the field of heat treatment of forgings, can solve problems such as poor heat treatment effect, achieve good forging effect and eliminate mixed crystals

Active Publication Date: 2018-09-18
浙江迪特高强度螺栓有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the forging is only normalized, quenched and tempered once, and the heat treatment effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Embodiment: a kind of heat treatment method of forging, the present invention comprises the following steps:

[0028] Step 1. Normalizing for the first time: After heating the forging to 860-900°C, keep the temperature for 13 hours;

[0029] Step 2, the first quenching: after rapidly raising the temperature of the forging described in step 1 to 850-880°C, keep the temperature for 12 hours;

[0030] Step 3. Tempering for the first time: After the forgings processed in step 2 are heated to 800-820°C, the furnace is cooled to 600°C, and the temperature is maintained;

[0031] Step 4. Normalizing for the second time: After heating the forging treated in step 3 to 820-850°C, keep the temperature for 12 hours;

[0032] Step 5, the second quenching: After heating the forging treated in step 4 to 720-800°C, keep the temperature for 11 hours;

[0033] Step 6. Complete tempering: After the forging processed in step 5 is heated up to 700°C, the furnace is cooled to 550°C and mai...

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PUM

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Abstract

The invention discloses a heat treatment method of a forge piece. The heat treatment method of the forge piece comprises the steps of normalizing for the first time, quenching for the first time, tempering for the first time, normalizing for the second time, quenching for the second time and completely tempering. With the heat treatment method of the forge piece, a mixed crystal phenomenon of the forge piece can be eliminated; and through twice normalizing, twice quenching and twice tempering, the forging effect is good, a crystal non-uniform phenomenon of the forge piece which is normalized, quenched and tempered for the first time can be eliminated, the non-uniform crystal can be forged again during normalization for the second time, and more crystal grains with uniform crystals can be obtained during final tempering.

Description

technical field [0001] The invention belongs to the technical field of heat treatment technology, in particular to a heat treatment method for forgings. Background technique [0002] A forging is an object in which a metal is pressured to form a required shape or a suitable compression force through plastic deformation. This force is typically achieved through the use of a hammer or pressure. The forging process creates a refined grain structure and improves the physical properties of the metal. In the actual use of components, a correct design can make the particle flow in the direction of the main pressure. Heat treatment is a thermal processing process in which the metal material is in a solid state, through means of heating, heat preservation, and cooling, to change the internal structure of the metal material, thereby obtaining the required properties. [0003] Commonly used methods are: [0004] Annealing: There are complete annealing, incomplete annealing, isother...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/28C21D1/18C21D6/00C22C38/04C22C38/02C22C38/22C22C38/20C22C38/44C22C38/42
CPCC21D1/18C21D1/28C21D6/004C21D6/005C21D6/008C22C38/002C22C38/007C22C38/02C22C38/04C22C38/20C22C38/22C22C38/42C22C38/44
Inventor 钱仁元
Owner 浙江迪特高强度螺栓有限公司
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