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Propeller shaft forging process

A propeller shaft and process technology, applied in the field of forging, achieves the effects of uniform internal deformation, easy forming, and improved service life

Active Publication Date: 2016-12-21
JIANGSU JINYUAN FORGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to solve the above-mentioned technical problems, and to provide a propeller shaft forging process, which enables the core part of the forging billet and the subsurface metal to obtain a large amount of deformation at the same time, the distribution of the equivalent strain is more uniform, and it is easy to form and compact. Overcome the defects of uneven internal deformation and segregation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0006] A propeller shaft forging process, characterized in that it includes the following steps: 1), the first fire heats the steel ingot of the blank to 1100°C, heats it for 6 hours, presses the jaws, chamfers, and removes the bottom of the ingot; 2), the second The second fire reheats the billet obtained in step 1), heats it to 1220°C, and keeps it warm for 16 hours, upsetting and elongating with an arc-shaped tooth-shaped anvil with an upper convex and a lower concave; The billet is reheated, heated to 1100°C, upsetting with an arc-shaped tooth-shaped anvil with convex and concave, drawn to the specified size, and trimmed; 4), heat treatment: heat to 590°C for 7 hours, air-cooled to 300°C, heated to 490°C, air-cooled. The arc-shaped tooth-shaped anvil with upper convex and lower concave includes an upper anvil and a lower anvil. Two or more arc convex surfaces of equal radius, and the adjacent arc convex surfaces are smoothly transitioned by the arc surface, and the lower a...

Embodiment 2

[0008] A propeller shaft forging process, characterized in that it includes the following steps: 1), the first fire heats the steel ingot of the blank to 1110°C, heats it for 7 hours, presses the jaws, chamfers, and removes the bottom of the ingot; 2), the second The second fire reheats the billet obtained in step 1), heats it to 1230 ° C, and keeps it warm for 16 hours, and uses a circular arc tooth-shaped convex and concave anvil to upset and elongate; 3), and the third fire to obtain in step 2) The billet is reheated, heated to 1110°C, upsetting with an arc-shaped tooth-shaped anvil with convex and concave, drawn to the specified size, and trimmed; 4), heat treatment: heat to 600°C for 8 hours, air-cooled to 300°C, heated to 500°C, air-cooled. The arc-shaped tooth-shaped anvil with upper convex and lower concave includes an upper anvil and a lower anvil. Two or more arc convex surfaces of equal radius, and the adjacent arc convex surfaces are smoothly transitioned by the ar...

Embodiment 3

[0010] A propeller shaft forging process, characterized in that it includes the following steps: 1), the first fire heats the steel ingot of the blank to 1220°C, heats it for 8 hours, presses the jaws, chamfers, and removes the bottom of the ingot; 2), the second The second fire reheats the billet obtained in step 1), heats it to 1250°C, keeps it warm for 16 hours, and uses a circular arc tooth-shaped convex and concave anvil to upset and elongate; 3), and the third fire to obtain in step 2) The billet is reheated, heated to 1220°C, upsetting with an arc-shaped toothed anvil with convex and concave, drawn to the specified size, and trimmed; 4), heat treatment: heated to 610°C for 9 hours, air-cooled to 300°C, heated to 510°C, air-cooled. The circular-arc tooth-shaped anvil with upper convex and lower concave includes an upper anvil and a lower anvil. Two or more arc convex surfaces of equal radius, and the adjacent arc convex surfaces are smoothly transitioned by the arc surfa...

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PUM

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Abstract

The invention relates to a propeller shaft forging process. The propeller shaft forging process is characterized by comprising the following steps that (1), a steel ingot of a blank is heated to 1,100 DEG C to 1,220 DEG C with first fire, heat preservation is carried out for 6 hours to 8 hours, and jaw pressing, chamfering and ingot bottom removal are carried out; (2), the blank obtained in the first step is heated again with second fire and heated to 1,220 DEG C to 1,250 DEG C, heat preservation is carried out for 16 hours, an arc-tooth-shaped hammering block with the upper convex portion and the lower concave portion is used for upsetting and drawing; (3), the blank obtained in the second step is heated again with third fire and heated to 1,100 DEG C to 1,220 DEG C, the arc-tooth-shaped hammering block with the upper convex portion and the lower concave portion is used for upsetting, and the blank is drawn to the specific dimension, and edge cutting is carried out; and (4), thermal treatment is carried out, wherein the blank is heated to 600+ / -10 DEG C, heat preservation is carried out for 7 hours to 9 hours, air cooling is carried out till the temperature reaches 300 DEG C, the blank is heated to 500+ / -10 DEG C, and air cooling is carried out. A product produced through the process is even in internal deformation and easy to form, the internal quality of a forged product is good, and the service life of the forged part is prolonged.

Description

technical field [0001] The invention belongs to the technical field of forging, and in particular relates to a propeller shaft forging process. Background technique [0002] Propeller shafts belong to marine forgings. With the rapid development of the world shipbuilding industry, the specifications of marine forgings are getting larger and larger, the technical requirements are getting higher and higher, and the production difficulty is getting more and more difficult. There are non-metallic inclusions, gases, segregation, There are defects such as coarse grains, voids and porosity in the center. The core issue of quality control for large forgings is to compact the void defects to change segregation and prevent surface cracking. Contents of the invention [0003] The object of the present invention is to solve the above-mentioned technical problems, and to provide a propeller shaft forging process, which enables the core part of the forging billet and the subsurface metal...

Claims

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Application Information

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IPC IPC(8): B21K1/06B21J1/06
CPCB21J1/06B21K1/06
Inventor 葛艳明杨志华宋建强
Owner JIANGSU JINYUAN FORGE
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