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Processing method of forge piece pump shaft

A processing method and pump shaft technology, which are applied in metal processing equipment, engine components, mechanical equipment, etc., can solve the problems of high cost of forgings, high energy consumption, contamination of forgings, etc., improve mechanical properties, save product materials, Effect of improving mold life

Inactive Publication Date: 2013-03-27
CHANGLI FORGING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantages of this solution are: large-tonnage presses are required, high energy consumption, low material utilization rate, resulting in high forging costs
The forgings produced by the technical process of this scheme are prone to contamination, dissatisfaction, etc., the defect rate is 5%, and the utilization rate of raw materials is only 20-30%. Due to reasons such as excessive flash, the life of the mold is only About 5000-6000 pieces

Method used

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  • Processing method of forge piece pump shaft

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Effect test

Embodiment Construction

[0029] A processing method for a forged pump shaft, comprising the following steps:

[0030] a. Pouring cylindrical billet step

[0031] The weight percentage of chemical composition in the cylindrical blank is: C 0.26-0.350%, Mn 1.2-2.2%, Si 0.6-1.5, Cr 1.6-2.0%, W 0.42-0.8%, Cd 0.4-1.0%, Cu 0.35-0.50% , P≤0.040%, S≤0.030%, the balance is Fe and unavoidable inclusions; when the poured billet is air-cooled to 150-200°C, it is then heated to 750-800°C at 50-60°C per hour, Keep warm for 3-4 hours, after the furnace is cooled to room temperature, then raise the temperature to 1020-1050°C at 100-120°C per hour, and keep warm for 1-2 hours;

[0032] b. Forging steps

[0033] 1. Select a round steel with a diameter of 30mm, use a shearing machine to cut the material, and the length of the blank after shearing is 120mm;

[0034] 2. Put the blank in step 1 into the intermediate frequency heating furnace for heating, the heating temperature is 1120-1180°C, and the heating time is ke...

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Abstract

The invention discloses a processing method of a forge piece pump shaft. The processing method of the forge piece pump shaft comprises the following steps: a step a of pouring a cylindrical blank material, wherein the cylindrical blank material comprises chemical components, by weight percent: 0.26-0.350% of C, 1.2-2.2% of Mn, 0.6-1.5% of Si, 1.6-2.0% of Cr, 0.42-0.8% of W, 0.4-1.0% of Cd, 0.35-0.50% of Cu, no greater than 0.040% of P, no greater than 0.030% of S, and the balance of Fe and inevitable included impurities; and the step a comprises the following steps: cooling the completely-poured blank material to 150 to 200 DEG C in air, heating the blank material to 750 to 800 DEG C at a temperature rise speed of 50 to 60 DEG C for 3-4h heat preservation, cooling the blank material to the room temperature in a furnace and then heating the blank material to 1020 to 1050 DEG C at a temperature rise speed of 100 to 120 DEG C for 1-2h heat preservation; and a step b of forging. The processing method of the forge piece pump shaft is beneficial to the large-batch industrial production of the forge piece pump shaft; and moreover, the phenomena of dirt inclusion and impossible fullness occurring during the forging process are reduced, the mechanical performance of a product is further improved, the product material is saved and the service life of a die for the product is prolonged.

Description

technical field [0001] The invention relates to a processing method of a forged pump shaft. Background technique [0002] The idler shaft is a key part of the car. Due to its special shape and the importance of its performance, it is difficult to forge it. The distribution of materials and the selection of processes need to be carefully considered. For this reason, the development of reasonable forging methods for such forgings has also attracted attention both at home and abroad. [0003] At present, the conventional technological process of domestic idler shafts is: heating, pre-forging, final forging, and finishing. The disadvantages of this solution are: a large-tonnage press is required, high energy consumption, low material utilization rate, resulting in high forging cost. The forgings produced by the technical process of this scheme are prone to contamination, dissatisfaction, etc., the defect rate is 5%, and the utilization rate of raw materials is only 20-30%. Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/00B21K1/06
Inventor 杨奎琦陈正义张斌
Owner CHANGLI FORGING
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