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Preparation method for high-hardness hammer head for radial precision forging machine

A high-hardness, precision forging machine technology, applied in coatings, metal material coating processes, etc., can solve the problems of difficult to meet the production requirements of high-performance alloys, easy to produce deformation, fracture and scrap, etc., to achieve dense organization and lower working temperature. , the effect of saving energy

Inactive Publication Date: 2015-11-18
NO 52 INST OF CHINA NORTH IND GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the working surface of the hammer head is in contact with the hot metal at high temperature for a long time, and it bears a huge impact load and the huge friction generated when the metal deforms and flows during the striking process, it is easy to deform, crack, and even break and scrap
It is difficult for the hammer heads used in the active precision forging machines to meet the production requirements of high-performance alloys

Method used

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  • Preparation method for high-hardness hammer head for radial precision forging machine
  • Preparation method for high-hardness hammer head for radial precision forging machine
  • Preparation method for high-hardness hammer head for radial precision forging machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing a high-hardness hammerhead for a radial precision forging machine, the specific steps are as follows:

[0031] 1) Matrix forging: the matrix material is 4Cr5MoSiV1 hot forging abrasive steel, its chemical composition: C0.32%, Si0.85%, Mn≤0.40%, Cr4.5%, Mo1.0%, V0.8%, the rest Fe, forging process of hot work die steel: forging temperature is 750°C, forging ratio 2.5; forging annealing process is: 860°C, heat preservation 2h, furnace cooling to 540°C, air cooling;

[0032] 2) Heat treatment of matrix; heat treatment process of 4Cr5MoSiV1 hot work die steel forgings: oil quenching at 1000°C, tempering at 500°C;

[0033] 3) Substrate surface treatment: Grinding and shot blasting the working surface of the substrate; the treatment process uses 40-80 mesh white corundum (HRC70-90), and the treatment time is 1-2 hours;

[0034] 4) Laser cladding on the working surface of the substrate; a. Selection of cladding materials; the material for laser cladding ...

Embodiment 2

[0037] A method for preparing a high-hardness hammerhead for a radial precision forging machine, the specific steps are as follows:

[0038] 1) Matrix forging; the matrix material is 4Cr5MoSiV1 hot forging abrasive steel, its chemical composition: C0.35%, Si0.90%, Mn≤0.40%, Cr4.5%, Mo1.2%, V0.9%, the rest It is Fe; forging process of hot work die steel: forging temperature is 750°C, forging ratio is 2.7; forging annealing process is: 860°C, heat preservation for 2h, furnace cooling to 540°C, air cooling;

[0039] 2) Heat treatment of matrix; heat treatment process of 4Cr5MoSiV1 hot work die steel forgings: oil quenching at 1000°C, tempering at 500°C;

[0040] 3) Substrate surface treatment: Grinding and shot blasting the working surface of the substrate; the treatment process uses 40-80 mesh white corundum (HRC70-90), and the treatment time is 1-2 hours;

[0041] 4) Laser cladding on the working surface of the substrate; a. Selection of cladding materials; the material for la...

Embodiment 3

[0044] A method for preparing a high-hardness hammer head for a radial precision forging machine, the specific steps are as follows:

[0045]1) Matrix forging; the matrix material is 4Cr5MoSiV1 hot forging abrasive steel, its chemical composition: C0.40%, Si1.0%, Mn≤0.40%, Cr4.8%, Mo1.3%, V1.0%, the rest It is Fe; the forging process of hot work die steel: the forging temperature is 800 °C, the forging ratio is 3.0; the annealing process of the forging is: 890 °C, heat preservation for 4 hours, furnace cooling to 540 °C, air cooling;

[0046] 2) Matrix heat treatment; heat treatment process of 4Cr5MoSiV1 hot work die steel forgings: oil quenching at 1050℃, tempering at 550℃;

[0047] 3) Surface treatment of the substrate; grinding and shot peening the working surface of the substrate; 40~80 mesh white corundum (HRC70~90) is used for the treatment process, and the treatment time is 1~2 hours;

[0048] 4) Laser cladding on the working surface of the base body; a. Selection of c...

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Abstract

The invention discloses a preparation method for a high-hardness hammer head for a radial precision forging machine. The preparation method is characterized by comprising the following steps: forging a basal body which is made from 4Cr5MoSiV1 hot-forging mould steel comprising the following chemical components in percentage by weight: 0.32%-0.42% of C, 0.80%-1.20% of Si, less than or equal to 0.40% of Mn, 4.5%-5.5% of Cr, 1.0%-1.5% of Mo, 0.8%-1.0% of V and the balance of Fe; carrying out a forging process of heat-working mould steel with a forging ratio of 2.5-3.0 at a forging temperature of 750-800 DEG C; carrying out a forging piece annealing process: preserving the temperature for 1-4 hours at 860-890 DEG C, furnace-cooling to 50 DEG C, and carrying out air-cooling; carrying out basal body thermal treatment: carrying out a thermal treatment process of a 4Cr5MoSiV1 heat-working mould steel forging piece: carrying out oil quenching at 1000-1050 DEG C and carrying out tempering at 500-600 DEG C; carrying out basal body surface treatment: carrying out polishing and shot blasting treatment on a basal body working surface; carrying out laser cladding on the basal body working surface; carrying out mechanical processing and performance detecting on the forging piece, and warehousing the forging piece. The invention aims to provide the preparation method for the high-hardness hammer head, which is long in service life, for the radial precision forging machine.

Description

technical field [0001] The invention relates to a preparation process of a high-hardness hammerhead for a radial precision forging machine, belonging to the field of metal materials. Background technique [0002] The basic principle of radial forging was proposed by Austrian scientist Dr. B. Rralowetz in 1946. By the mid-1970s, radial forging machines from 6.5MN to 25MN had come out one after another and were applied to the forging of large billets and continuous casting ingots of high alloy steel and other alloys (such as tungsten alloy). Radial forging is a forming method that applies multiple uniformly distributed forging forces in the circumferential direction to shaft parts on the same plane at the same time. Precision forging machine hammer head is one of the important parts of precision forging machine, which is connected to four hammer rods at 90° to each other by the base plate. The hammer rod is connected with the crank connecting rod mechanism, and moves syn...

Claims

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Application Information

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IPC IPC(8): C22C38/24C21D1/18C23C24/10
Inventor 王力杰战中学吕建军闫志飞李鹏张文波刘素芬侯福青李永峰李淑利吴红张明贺新民
Owner NO 52 INST OF CHINA NORTH IND GRP CORP
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