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Square steel forging and pressing process

A process and steel forging technology, applied in the direction of metal extrusion, manufacturing tools, metal processing equipment, etc., can solve the problems of many hot forging processes, poor workpiece precision, decarburization and burning loss, etc., to reduce the number of drawing times and improve the quality of finished products The effect of high efficiency and reducing thermal stress

Inactive Publication Date: 2016-01-20
刘振宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many hot forging processes, the precision of the workpiece is poor, the surface is not smooth, and the forging is prone to oxidation, decarburization and burning.

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0032] The invention provides a square steel forging process, which comprises the following steps:

[0033] 1) prepare square steel heating curve figure, the abscissa of described square steel heating curve figure is heating time, and ordinate is heating temperature:

[0034] 1.1) Select different steel types and obtain their own heating characteristics;

[0035] 1.2) According to the heating characteristics of different steel grades obtained in step 1.1), the furnace inlet temperature, initial forging temperature and furnace discharge temperature of different steel grades are determined;

[0036] 1.3) Determine the heating time of different steel types during forging;

[0037] 1.4) Draw the heating curves of different steel types with the abscissa as the heating time and the ordinate as the heating temperature.

[0038] 2) According to the square steel heating curve obtained in step 1), the square steel is subjected to heat treatment:

[0039] 2.1) The furnace temperature ...

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Abstract

The invention relates to a square steel forging and pressing process. The square steel forging and pressing process comprises the following steps that (1) a square steel heating curve graph is drawn, the horizontal ordinate of the square steel heating curve graph indicates the heating time, and the vertical coordinate indicates the heating temperature; (2) square steel is heated according to the square steel heating curve graph obtained in the step (1); and (3) upsetting treatment and drawing-out treatment are conducted on the heated square steel. By means of the square steel forging and pressing process, the process accuracy is high, the surface quality of the square steel is good, and a casting process is simple and reliable.

Description

technical field [0001] The invention belongs to the field of metal forging, and relates to a square steel forging process. Background technique [0002] During the forging process, forging can compact or weld defects such as shrinkage cavities, shrinkage porosity, voids, bubbles and cracks in the as-cast metal structure, and can also refine grains and break inclusions, so as to obtain a certain forging flow. line tissue. In actual production, various forgings are often used to produce various important and heavy-duty machine parts or blanks, such as main shafts and gears of machine tools, connecting rods of internal combustion engines, hooks of cranes, etc., according to production needs. During the processing process, it is necessary to deform it such as upsetting, drawing, reaming, bending, and deep drawing. Not good, coupled with the constraints of forging structure technology, forgings are usually only used as blanks for machine parts. Hot forging is a forging perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21J5/08B21J5/06B21J1/06B21C1/02B21C43/04C21D8/06C21D1/74
Inventor 刘振宇
Owner 刘振宇
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