Manufacturing method of high-performance 42CrMo gear

A production method and high-performance technology, applied in the direction of wheels, manufacturing tools, forging/pressing/hammering machinery, etc., to achieve the effect of compact structure, good wear resistance and high tempering resistance

Pending Publication Date: 2020-12-15
SHANDONG IRAETA HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of non-destructive testing to ensure that the internal and surface quality of the gear meets the requirements, and how to improve the tempering resistance and wear resistance of the gear, the above-mentioned patent documents do not mention

Method used

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  • Manufacturing method of high-performance 42CrMo gear
  • Manufacturing method of high-performance 42CrMo gear
  • Manufacturing method of high-performance 42CrMo gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method of manufacturing a high-performance 42CrMo gear, comprising the following steps:

[0043] (1) Determine the technological process to be adopted;

[0044] (2) Die forging process planning and numerical simulation;

[0045] (3) Optimize the die forging process according to the numerical simulation results, determine the final die forging plan, and start the mold making;

[0046] (4) Re-examination of raw materials to check whether the chemical components meet the technical specifications;

[0047] (5) Determine the specification and size of the blank according to the forging process, and cut the material;

[0048] (6) Blank heating: According to the heating process, the blank is heated, and the mold is preheated at the same time;

[0049] (7) Die forging: According to the planned die forging process, the tire die forging of the gear is carried out; the die forging process includes the following steps: figure 1 , attached figure 2 and attached image 3 The ...

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PUM

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Abstract

The invention belongs to the technical field of gear machining, and particularly relates to a manufacturing method of a high-performance 42CrMo gear. The method comprises the steps that a technological process is determined, numerical simulation and optimization are performed on die-forging forming technological parameters in the determined technological process, and then specified raw materials are adopted and subjected to blank heating, die-forging forming, normalizing heat treatment, rough turning, hardening and tempering treatment and finish turning treatment to obtain the high-performance42CrMo gear. The gear manufactured by adopting the process has the advantages that (1) by adopting loose tooling forging forming, a good macroscopic fiber flow direction can be obtained in a gear body, and the internal structure of the gear is compact and uniform; (2) before water-cooling quenching and tempering treatment, nondestructive testing is carried out on the gear to ensure that the internal and surface quality conditions of the gear meet the use requirements; and (3) water-cooling quenching and tempering treatment is adopted, so that the tempering resistance of the gear body is higher, and the wear resistance is better.

Description

technical field [0001] The invention belongs to the technical field of gear processing, and in particular relates to a manufacturing method of a high-performance 42CrMo gear. Background technique [0002] Regarding the heat treatment process of 42CrMo gear shafts, the following patent documents have disclosed: [0003] CN105714087A discloses a 42CrMo gear shaft heat treatment process, which is characterized in that it includes the following steps: 1) normalizing: heating a normalizing furnace to 870°C-880°C, keeping the temperature for 1 hour, and then air-cooling at 20°C / s; 2) quenching and tempering : Heat the workpiece to 840°C, then oil-cool quenching, keep for 1h, and then put it into a 480°C tempering furnace for tempering, keep for 1-1.5h, and air-cool; 3) Induction heating and quenching: Heat the workpiece in the induction furnace to 890°C-900°C, holding time 35s, air cooling, cooling rate 65°C / s; 4) Low temperature tempering: heat the workpiece to 150-180°C again, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/02B21J5/08B21J13/02B21K1/30C21D9/32
CPCB21K1/30B21J5/02B21J13/02B21J5/08C21D9/32
Inventor 刘荫锋尚贺军潘文东董云龙赵丽美赵兴明赵方娜张维全臧超
Owner SHANDONG IRAETA HEAVY IND
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