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Forge piece manufacturing method and process

A manufacturing method and forging technology are applied in the field of forging manufacturing, which can solve the problems of segregation and shrinkage, and achieve the effect of improving the effect.

Active Publication Date: 2021-04-27
浙江瑧瀚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a manufacturing method and process for forgings, which has the advantages of high product performance, and the solved forging method inevitably has defects such as segregation, shrinkage cavity, looseness, etc. The more obvious the defects are, the internal defects of steel ingots will have a significant adverse effect on the performance of large forgings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First, heat the steel ingot to 400-700°C, then heat it to 950-1000°C at a heating rate of 50-90°C / h, keep it warm for 3-8 hours, and then heat it at a heating rate of 50-100°C / h to 1200-300°C, keep warm for 14-16 hours, then pre-press the heated steel ingot, then put the pre-pressed steel ingot into the forging machine to forge into a cuboid shape, and then put the cuboid-shaped steel ingot on the same side Two wide and two high chamfers, and then the chamfered part of the steel ingot after chamfering is drawn longitudinally, and the long side is square, and finally the forged billet is cut into the desired shape to obtain a semi-finished forging , and then put the semi-finished forging obtained in the above steps into a quenching furnace for quenching treatment, the quenching temperature is 400-500°C, the holding time is 5-6 hours, the water temperature is 50-70°C, and then the quenched semi-finished product The forgings are placed in an aging furnace for processing. ...

Embodiment 2

[0029] In embodiment one, add following operation:

[0030] In the first step, the temperature of the steel ingot is kept at 400-500°C when the pre-pressing treatment is performed, and the pressure during the pre-pressing is kept at 5000-8000 tons.

[0031] First, heat the steel ingot to 400-700°C, then heat it to 950-1000°C at a heating rate of 50-90°C / h, keep it warm for 3-8 hours, and then heat it at a heating rate of 50-100°C / h to 1200-300°C, keep warm for 14-16 hours, then pre-press the heated steel ingot, then put the pre-pressed steel ingot into the forging machine to forge into a cuboid shape, and then put the cuboid-shaped steel ingot on the same side Two wide and two high chamfers, and then the chamfered part of the steel ingot after chamfering is drawn longitudinally, and the long side is square, and finally the forged billet is cut into the desired shape to obtain a semi-finished forging , and then put the semi-finished forging obtained in the above steps into a q...

Embodiment 3

[0033] In embodiment two, add following operation:

[0034] In the step 2, a forging press with a capacity of 8,000 to 15,000 tons is selected for forging, and the temperature during forging is 900 to 1,000°C.

[0035] First, heat the steel ingot to 400-700°C, then heat it to 950-1000°C at a heating rate of 50-90°C / h, keep it warm for 3-8 hours, and then heat it at a heating rate of 50-100°C / h to 1200-300°C, keep warm for 14-16 hours, then pre-press the heated steel ingot, then put the pre-pressed steel ingot into the forging machine to forge into a cuboid shape, and then put the cuboid-shaped steel ingot on the same side Two wide and two high chamfers, and then the chamfered part of the steel ingot after chamfering is drawn longitudinally, and the long side is square, and finally the forged billet is cut into the desired shape to obtain a semi-finished forging , and then put the semi-finished forging obtained in the above steps into a quenching furnace for quenching treatmen...

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PUM

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Abstract

The invention discloses a forge piece manufacturing method and process. The manufacturing method comprises the following steps that a steel ingot is heated to 400 DEG C-700 DEG C, then the steel ingot is heated to 950 DEG C-1000 DEG C at a heating speed of 50 DEG C / h-90 DEG C / h, the temperature is maintained for 3 hours-8 hours, the steel ingot is heated to 1200 DEG C-1300 DEG C at a heating speed of 50 DEG C / h-100 DEG C / h, the temperature is maintained for 14 hours-16 hours, the heated steel ingot is subjected to pre-pressing treatment, the steel ingot subjected to the pre-pressing treatment is put into a forging machine to be forged into a cuboid shape, then two widths and two heights on the same side of the rectangular parallelepiped-shaped steel ingot are chamfered, then chamfered parts of the chamfered steel ingot are longitudinally drawn out, and the drawing-out surfaces are square. By the adoption of the manufacturing method, the internal quality and the external surface quality of a forge piece can be effectively controlled, the manufacturing method is particularly suitable for manufacturing of large-specification heat-resistant steel, the forge piece obtained through the manufacturing method is quite remarkable in forge piece quality improving effect, and continuous and stable operation can be achieved.

Description

technical field [0001] The invention relates to the technical field of forgings, in particular to a manufacturing method and process of forgings. Background technique [0002] A forging is an item of metal to which pressure is applied to shape the desired shape or a suitable compressive force through plastic deformation. This force is typically achieved by the use of a hammer or pressure. The forging process builds a fine grain structure and improves the metal's Physical properties. In the actual use of parts, a correct design can make the particle flow in the direction of the main pressure. Forgings need to be consistent in each piece, without any porosity, excess space, inclusions or other defects. However, the existing forging manufacturing methods inevitably have defects such as segregation, shrinkage cavity, and porosity in the casting process, and the larger the shape of the steel ingot, the more obvious the internal defects of the steel ingot, and the internal defects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/78C21D8/00B21J1/06B21J5/00
CPCC21D1/18C21D1/78C21D8/005B21J1/06B21J5/002
Inventor 刘锋华
Owner 浙江瑧瀚科技有限公司