Upsetting method of bearing steel cake blank

A technology of bearing steel and cake billet, which is applied in the direction of metal processing equipment, etc., can solve the problems of uneven deformation of cake billet, uneven structure and performance of cake billet, affecting product structure and performance, etc., and achieve the effect of improving forging performance and uniform deformation

Inactive Publication Date: 2016-04-27
GUIZHOU ANDA AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other areas of the cake base, this area has little or no deformation, resulting in uneven deformation of the cake base
The deformation inhomogeneity directly affects the inhomogeneity of the structure and properties of the cake blank, and even has a negative impact on the subsequent forging process, and finally affects the structure and properties of the product.

Method used

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  • Upsetting method of bearing steel cake blank
  • Upsetting method of bearing steel cake blank
  • Upsetting method of bearing steel cake blank

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Experimental program
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specific Embodiment approach

[0030] The main chemical element content (weight percentage) of the steel is: C content 0.17% ~ 0.23%, Mn content 0.30% ~ 0.60%, Si content 0.15% ~ 0.40%, S content ≤ 0.030%, P content ≤0.030%, the content of Cr is 1.25%-1.75%, the content of Ni is 3.25%-3.75%, the content of Cu is ≤0.25, and the balance is Fe.

[0031] The steps of this method are as follows:

[0032] Step 1: General upsetting.

[0033] Heat the bearing steel bar with diameter D and height H to the forging temperature in the forging furnace, and keep it warm for a period of time; put the bar on the lower cutting board of the forging press, in order to ensure that the middle area of ​​the bearing steel cake billet after upsetting The amount of deformation can reach 36% to 42%, and the bar is upset to a height of H 0 =(0.60~0.64)H, to obtain the middle cake base 1, such as figure 2 shown.

[0034] Step 2: Local upsetting of the upper end surface.

[0035] As shown in the figure, the special tooling 2 is p...

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Abstract

The invention discloses an upsetting method of a bearing steel cake blank. The method comprises the following steps: upsetting a bearing steel bar by a conventional method until the deformation of the bearing steel bar reaches 36 to 40%; partially deforming the end surface of a middle cake blank through a special tooling. With the adoption of the method, the defects such as a dead deformation area in the conventional upsetting method can be effectively removed, the structure uniformity of the bearing steel cake blank can be effectively improved, and thus the performance of a forge piece can be improved. The method is applied to the upsetting of the bearing steel cake blank.

Description

technical field [0001] The invention relates to an upsetting method for a cake base, in particular to an upsetting method for a bearing steel cake base. Background technique [0002] Upsetting is a forging process that uses a forging press to reduce the height of the metal material and increase the cross-section. It is an important and most basic process in the forging industry. Provide blanks. Usually, during the upsetting process of the cake blank, due to the great friction between the upper and lower cutting boards of the forging press and the upper and lower end surfaces of the bar blank, there will eventually be a certain deformation dead zone on the upper and lower end surfaces of the cake blank (such as figure 1 shown). Compared with other areas of the cake base, this area has little deformation or even no deformation, resulting in uneven deformation of the cake base. The deformation inhomogeneity directly affects the inhomogeneity of the structure and properties o...

Claims

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Application Information

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IPC IPC(8): B21J5/08
CPCB21J5/08
Inventor 邹伟李明蒋礼萍邹善垚王宇锋
Owner GUIZHOU ANDA AVIATION FORGING
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