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Preparation method of low-alloy hammerhead for rotary radial precision cold forging machine tool

A rotating radial, low-alloy technology, used in metal processing equipment, metal material coating technology, vacuum evaporation plating and other directions, can solve problems such as micro-efficiency, and achieve improved matrix toughness, enhanced hardness, and refined grains. Effect

Active Publication Date: 2021-10-29
江苏海劭科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cold working die steels D2, 12CrMoV, DC53, 7CrSiMnMoV, SLD, ASSAB88, etc. currently selected for precision cold forging hammer heads cannot meet the requirements of the matrix material for precision cold forging machine hammer heads. In order to improve the surface hardness of cold working die steel, Carburizing, nitriding, carbonitriding and other surface strengthening processes are used to extend the service life of the hammer head, but with little effect

Method used

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  • Preparation method of low-alloy hammerhead for rotary radial precision cold forging machine tool

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Embodiment Construction

[0027] This specific embodiment adopts following technical scheme: its operating steps are as follows:

[0028] Step 1, substrate selection:

[0029] Choose 7Cr 2 NiMoSiVRE cold work die steel is used as the base material, and its chemical composition weight percentage is as follows: C0.68-0.78%, Si 0.64-0.74%, Mn 0.75-0.85%, Cr 2.3-2.45%, Ni 0.32-0.42%, Mo 0.20- 0.35%, V 0.20-0.30%, RE 0.05-0.08%, the rest is supplemented by Fe;

[0030] Step 2, matrix forging:

[0031] Use forging equipment to forge the above-mentioned base material, that is, first quickly forge and upset, so that the forging ratio of the material is increased from 3-4 to 7.0-8.5, and then use radial forging to form a steel ingot. The initial forging temperature is 1100-1150 °C, the final forging temperature is 850-950 °C, and the forging ratio is 7.0-8.5;

[0032] Step 3, substrate production:

[0033] Heating the steel ingot, and then use 20 / 30MN fast forging machine to open the billet to form a forgi...

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Abstract

The invention discloses a preparation method of a low-alloy hammerhead for a rotary radial precision cold forging machine tool, and relates to the technical field of machining of mechanical parts. 7Cr2NiMoSiVRE cold work die steel is selected as a base material, and forging equipment is adopted for forging the base material; the steel ingot is heated, and a base body is produced; machining and forming are conducted; CFUMSIP treatment is conducted on the working surface of the hammerhead; and the 7Cr2NiMoSiVRE hammerhead is subjected to finishing and performance detection processes, and then the 7Cr2NiMoSiVRE hammerhead is obtained. An upsetting process is adopted, the forging ratio of the base body is increased, then combined forging of fast forging and radial precision forging is adopted, the internal structure of the base body is improved, grains are refined, the toughness of the base body is improved, and in order to meet the use requirements of high toughness and high hardness of the hammerhead, a nano composite coating is prepared on the working face of the hammerhead through a closed field unbalanced magnetron sputtering ion deposition technology, the surface hardness of the hammerhead is enhanced, and the service life of the hammerhead is prolonged.

Description

technical field [0001] The invention relates to the technical field of mechanical parts processing, in particular to a method for preparing a low-alloy hammerhead for a rotary radial precision cold forging machine tool. Background technique [0002] Precision forming technology is an advanced manufacturing technology that obtains net shape technology or near net shape at low cost. It conforms to the development trend of "fine, economical and clean" green manufacturing industry. Technology and other multi-disciplinary high-tech achievements integration. [0003] Radial forging is one of the important equipment for the realization of precision forming technology. The equipment can be derived and matched according to different precision forging technologies: hot precision forging technology, warm precision forging technology, cold precision forging technology and compound precision forging technology, so that only a small amount of processing or It meets the requirements of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/44C22C38/46C23C14/00C23C14/06C23C14/54B21J5/00C21D1/18C21D1/26C21D1/32C21D6/00C21D8/00
CPCC22C38/02C22C38/04C22C38/44C22C38/46C22C38/005C21D1/26C21D6/004C21D6/005C21D6/008C21D1/32C21D8/005C23C14/0036C23C14/0641C21D1/18C23C14/54B21J5/002
Inventor 刘明春游畯斐居长亮马占诚游人宇沈卉蘭田永良
Owner 江苏海劭科技有限公司
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