Processing technology for production of steel forgings

A processing technology and steel forging technology, applied in the field of steel forging production and processing technology, can solve the problems of high power consumption and low production efficiency, and achieve the effects of saving energy, improving production efficiency, and simplifying the forging processing process

Active Publication Date: 2019-01-25
QINGDAO TIANYING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This invention has the following disadvantages: After the forging is forged, it is cooled to room temperature, then reheated for normalizing treatment or quenching and tempering treatment, and then cooled to room temperature. To be heated in a resistance heating furnace and out of the furnace, resulting in a decrease in production efficiency

Method used

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  • Processing technology for production of steel forgings
  • Processing technology for production of steel forgings
  • Processing technology for production of steel forgings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment one: a kind of steel forging production processing technology, comprises the following steps:

[0055] (1) Cutting: use a cutting machine to process the carbon steel round steel bar with a diameter of φ30mm into the required fixed-length steel section. The composition of the carbon steel is: 0.165%C, 0.30%Si, 0.75%Mn , 1.325% Cr, 0.45% Ni, 0.40% Mo, 0.40% V, 0.05% Cu, and the balance is Fe.

[0056] (2) Forging forming: the round steel is heated to 1080°C, and then forged in a mold to form a steel forging blank, and the final deformation temperature is controlled at 800°C.

[0057] (3) Controlled cooling: Put the steel forging blank in step (2) into the air-cooled conveying equipment, adjust the wind speed and air volume so that the steel forging is rapidly cooled at 1°C / S for 3min to 620°C, turn off the air-cooled conveying equipment, and then Heat preservation treatment at ℃ for 5 minutes, restart the air-cooled conveying equipment to continue to cool the ...

Embodiment 2

[0063] Embodiment two: a kind of steel forging production processing technology, comprises the following steps:

[0064] (1) Cutting: use a cutting machine to process the carbon steel round steel bar with a diameter of φ30mm into the required fixed-length steel section. The composition of the carbon steel is: 0.165%C, 0.30%Si, 0.75%Mn , 1.325% Cr, 0.45% Ni, 0.40% Mo, 0.40% V, 0.05% Cu, and the balance is Fe.

[0065] (2) Forging forming: the round steel is heated to 1150°C, and then forged in a mold to form a steel forging blank, and the final deformation temperature is controlled at 900°C.

[0066] (3) Cooling control: Put the steel forging blank in step (2) into the air-cooled conveying equipment, adjust the wind speed and air volume so that the steel forging is rapidly cooled at 2.5°C / S for 2min to 600°C, turn off the air-cooled conveying equipment, and then Heat preservation at ℃ for 5 minutes, restart the air-cooled conveying equipment and reduce the wind speed, so that ...

Embodiment 3

[0072] Embodiment three: a kind of steel forging production processing technology, comprises the following steps:

[0073] (1) Cutting: use a cutting machine to process the carbon steel round steel bar with a diameter of φ30mm into the required fixed-length steel section. The composition of the carbon steel is: 0.165%C, 0.30%Si, 0.75%Mn , 1.325% Cr, 0.45% Ni, 0.40% Mo, 0.40% V, 0.05% Cu, and the balance is Fe.

[0074] (2) Forging forming: the round steel is heated to 1115°C, and then forged in a mold to form a steel forging blank, and the final deformation temperature is controlled at 850°C.

[0075] (3) Cooling control: put the steel forging blank in step (2) into the air-cooled conveying equipment, adjust the wind speed and air volume so that the steel forging is rapidly cooled at 1.5°C / S for 2.5min to 625°C, turn off the air-cooled conveying equipment, and then Heat preservation treatment at 625°C for 5 minutes, restart the air-cooled conveying equipment so that the steel...

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Abstract

The invention discloses a processing technology for production of steel forgings, and relates to the technical field of heat treatment of metal. The processing technology is technically characterizedby comprising the following steps: (1) blanking of a material; (2) forging and forming: heating round steel to the temperature of 1080 to 1150 DEG C, forging and pressing in a mold to form a steel forging blank, and controlling the final deformation temperature to be 800 to 900 DEG C; (3) control on cooling: putting the steel forging blank in step (2) into cooling equipment, quickly cooling to thetemperature of 600 to 700 DEG C at the rate of 1 to 2.5 DEG C/S, slowly cooling for 5 to 25min at the rate less than 0.75 DEG C/S, and discharging out of a furnace; (4) cutting of edges: cutting an excessive material of the steel forging blank after heat treatment in step (3); (5) shot blasting. The processing technology has the advantages that the problems of waste of energy sources and low production efficiency due to cooling to room temperature and then heating for tempering after forging in the production process of a traditional steel forging are solved; the residual heat of the forgingis utilized, the cooling speed is controlled, and the heat treatment is performed, so that the energy source is saved, and the processing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of metal heat treatment, more specifically, it relates to a production and processing technology of steel forgings. Background technique [0002] In order to obtain the required metallographic structure and mechanical properties of metal materials, heat treatment is usually performed after metal products are forged and formed, especially for non-quenched and tempered steels (such as 38MnVS, 30MnVS) or high-quality carbon structural steels and low-alloy steels. The heat treatment for it is usually normalizing treatment or quenching and tempering treatment. [0003] The prior art refers to the Chinese invention patent with the authorized announcement number CN102251084B, which discloses a performance heat treatment process for steel forgings for hydraulic cylinders of deep-sea oil production equipment, including the following steps: ① martensitic precipitation hardening stainless steel is used as the forging m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C22C38/42C22C38/12C22C38/58C22C38/48C21D1/02C23C22/47C23G1/08
CPCC21D1/02C22C38/02C22C38/04C22C38/12C22C38/42C22C38/44C22C38/46C22C38/48C22C38/58C23C22/47C23G1/088
Inventor 马之良杜青云
Owner QINGDAO TIANYING IND
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