Production technique of ring forge piece

A production process and technology of ring forgings, which are applied in the field of production process of ring forgings, can solve the problems of low production efficiency and high processing cost

Active Publication Date: 2018-02-23
WUXI BAOLU FORGING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the above problems and provide a production process for ring forgings to solve the problems of high processing costs and low production efficiency of existing ring forgings after quenching and tempering treatment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] In this embodiment, a production process of a ring forging, using Q345D steel as a raw material, forging the raw material to obtain a ring forging, also includes the following steps:

[0018] a. Put the ring forging into the heating furnace and heat it to 1240°C, and keep it warm for 2 hours;

[0019] b. After the heat preservation is over, take out the ring forging, use the electro-hydraulic hammer to elongate, the deformation is 55%, and then use the electro-hydraulic hammer for upsetting, the deformation is 65%, and the final deformation temperature is controlled at 1045 ℃;

[0020] c. Use a ring rolling machine to grind the ring to the required size of the ring forging, the deformation is 50%, the final deformation temperature is controlled at 865°C, and the wall thickness of the ring forging is 90mm to 120mm;

[0021] d. Air cool to room temperature.

[0022] The ring forging produced by the above process has a yield strength of 361MPa, and the V-notch Charpy impa...

Embodiment 2

[0024] In this embodiment, a production process of a ring forging, using Q345D steel as a raw material, forging the raw material to obtain a ring forging, also includes the following steps:

[0025] a. Put the ring forging into the heating furnace and heat it to 1220°C, and keep it warm for 2 hours;

[0026] b. After the heat preservation is over, take out the ring forging, use the electro-hydraulic hammer to elongate, the deformation is 52%, and then use the electro-hydraulic hammer for upsetting, the deformation is 62%, and the final deformation temperature is controlled at 1025°C;

[0027] c. Use a ring rolling machine to roll the ring to the required size of the ring forging, the deformation is 46%, the final deformation temperature is controlled at 874°C, and the wall thickness of the ring forging is 90mm to 120mm;

[0028] d. Air cool to room temperature.

[0029] The yield strength of the ring forging produced by the above process reaches 365MPa, and the V-notch Charpy...

Embodiment 3

[0031] In this embodiment, a production process of a ring forging, using Q345D steel as a raw material, forging the raw material to obtain a ring forging, also includes the following steps:

[0032] a. Put the ring forging into the heating furnace and heat it to 1200°C, and keep it warm for 2 hours;

[0033] b. After the heat preservation is over, take out the ring forging, use the electro-hydraulic hammer to elongate, the deformation is 51%, and then use the electro-hydraulic hammer for upsetting, the deformation is 60%, and the final deformation temperature is controlled at 1004°C;

[0034] c. Use a ring rolling machine to roll the ring to the required size of the ring forging, the deformation is 42%, the final deformation temperature is controlled at 852°C, and the wall thickness of the ring forging is 90mm to 120mm;

[0035] d. Air cool to room temperature.

[0036] The ring forging produced by the above process has a yield strength of 363MPa, and the V-notch Charpy impac...

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Abstract

The invention discloses a production technique of a ring forge piece. Q345D steel is selected as a war material, and the raw material is forged to obtain the ring forge piece. The production techniquefurther comprises the following steps that a, the ring forge piece is heated to be 1200-1240 DEG C and subjected to heat preservation for 2 h; b, after heat preservation is finished, the ring forge piece is taken out and subjected to drawing-out, the deformation quantity is 50-55%, upsetting is conducted, the deformation quantity is 60-65%, and the final deformation temperature is controlled to be 1000-1050 DEG C; c, ring grinding is conducted till the needed size of the ring forge piece is achieved, the deformation quantity is 40-50%, the final deformation temperature is controlled to be 850-900 DEG C, and the wall thickness of the ring forge piece is 90-120 mm; and d, air cooling is conducted till the room temperature is achieved. According to the production technique of the ring forgepiece, drawing-out, upsetting and ring grinding are conducted at the same fire time, and by controlling the deformation quantities of drawing-out, upsetting and ring grinding and the temperatures after drawing-out, upsetting and ring grinding, the yield strength of the produced ring forge piece reaches 360 MPa or more, and when the ring forge piece is subjected to a Charpy impact test of a V-shaped notch under the temperature of minus 20 DEG C, the average value of impact work of the ring forge piece reaches 120 J or more.

Description

technical field [0001] The invention relates to the field of heat treatment of metal materials, in particular to a production process of a ring forging. Background technique [0002] At present, for ring forgings that use Q345D steel as raw material and require a wall thickness of 90mm to 120mm, quenching and tempering treatment is used after forging to make their yield strength ≥ 350MPa, and V-shaped notch Charpy impact is performed at -20°C Test, the average value of its impact energy ≥ 100J, so as to meet customer requirements. However, quenching and tempering treatment after forging not only has high treatment cost, but also lower production efficiency. Therefore, it is urgent to find a new treatment method. Contents of the invention [0003] The object of the present invention is to address the above problems and provide a production process for ring forgings to solve the problems of high processing costs and low production efficiency of existing ring forgings after ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21K1/76B21J5/00B21J1/06B21J5/06B21J5/08B21H1/06
CPCB21H1/06B21J1/06B21J5/002B21J5/06B21J5/08B21K1/761
Inventor 华志伟
Owner WUXI BAOLU FORGING
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