A method of manufacturing a rotating shaft

A manufacturing method and technology of rotating shaft, applied in the direction of coating, metal material coating process, etc., can solve the problems of slow progress in application and promotion, and achieve the effects of low fatigue crack growth rate, promotion of service life, and reduction of surface friction coefficient

Active Publication Date: 2018-05-18
山东文远石油装备有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the constraints of performance cost and other factors, the progress of application promotion is slow

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for manufacturing a rotating shaft, characterized in that the specific preparation steps are as follows: the mass percentage of the titanium alloy material is: Cr 4.5%, Nb 3.5%, Cu 1.5%, Co 0.75%, Bi 0.45%, V 0.25%, Al 0.15 ﹪, Si0.065﹪, Ta 0.035﹪, Sc 0.035﹪, Ce 0.015﹪, the balance is Ti, prepare materials according to the above element composition, mix the prepared sponge titanium and other added element materials for 10 minutes, and mix The material is pressed and formed under a pressure of 6000 tons to obtain an electrode block, and the electrode block is welded in a vacuum environment to obtain a consumable electrode. The vacuum consumable electrode electric arc furnace is used for the first melting, the melting current is 8k-9kA, and the melting voltage is 60V, the smelted ingot is naturally cooled to obtain the first smelted ingot, and then the second smelting is performed, the smelting current is 12.5kA, the smelting voltage is 65V, the smelted ingot is na...

Embodiment 2

[0019] A method for manufacturing a rotating shaft, characterized in that the specific preparation steps are as follows: the mass percentage of the titanium alloy material is: Cr 4.2%, Nb 3.3%, Cu 1.1%, Co 0.77%, Bi 0.48%, V 0.24%, Al 0.18 ﹪, Si0.069﹪, Ta 0.037﹪, Sc 0.033﹪, Ce 0.012﹪, the balance is Ti, prepare materials according to the above element composition, mix the prepared sponge titanium and other added element materials for 10 minutes, and mix The material is pressed and formed under a pressure of 6000 tons to obtain an electrode block, and the electrode block is welded in a vacuum environment to obtain a consumable electrode. The vacuum consumable electrode electric arc furnace is used for the first melting, the melting current is 8k-9kA, and the melting voltage is 60V, the smelted ingot is naturally cooled to obtain the first smelted ingot, and then the second smelting is carried out, the smelting current is 12-13kA, the smelting voltage is 65V, the smelted ingot is...

Embodiment 3

[0021] A method for manufacturing a rotating shaft, characterized in that the specific preparation steps are as follows: the mass percentage of the titanium alloy material is: Cr 4.8%, Nb 3.7%, Cu 1.6%, Co 0.73%, Bi 0.48%, V 0.23%, Al 0.18 ﹪, Si0.068﹪, Ta 0.037﹪, Sc 0.032﹪, Ce 0.017﹪, the balance is Ti, prepare materials according to the above element composition, mix the prepared sponge titanium and other added element materials for 10 minutes, and mix The material is pressed and formed under a pressure of 6000 tons to obtain an electrode block, and the electrode block is welded in a vacuum environment to obtain a consumable electrode. The vacuum consumable electrode electric arc furnace is used for the first melting, the melting current is 8k-9kA, and the melting voltage is 60V, the smelted ingot is naturally cooled to obtain the first smelted ingot, and then the second smelting is carried out, the smelting current is 12-13kA, the smelting voltage is 65V, the smelted ingot is...

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Abstract

The invention discloses a manufacturing method of a rotating shaft rod. The manufacturing method is characterized by comprising the following specific preparation steps: the material preparation is performed according to the element composition; prepared sponge titanium and other adding element materials are mixed by 10 minutes; the mixture is pressed to mold an electrode block under 6000 t pressure; the electrode block is welded to obtain a consumable electrode in a vacuum environment; the primary smelting is performed by a vacuum consumable electrode arc furnace; the smelting current is 8 k-9 kA; the smelting voltage is 60 V; through three times of smelting, impurities and gas in the sponge titanium are fully released; titanium alloy refined grain alloy components are more uniform through forging; a titanium alloy shaft rod is high in plasticity, and is higher in strength and fracture toughness; metal sulfides improve the material self-lubricating performance; high-hardness material points are formed in a cladding layer to improve the working surface hardness; and the surface friction coefficient is largely reduced.

Description

technical field [0001] The invention relates to a manufacturing method of a rotating shaft, which belongs to the technical field of shafts. Background technique [0002] Although the casting method can obtain components with complex structures and low cost, the casting defects in the casting process lead to low performance of the product, which hinders the wider application of titanium alloys. Therefore, it is necessary to seek a preparation process with simple process and low cost, in order to achieve the material performance and cost level acceptable to the civil industry. Shafts, valve seats, valves, pulleys, synchronizer gear hubs, and synchronizer rings are all key parts with high performance requirements. Titanium entered the manufacturing industry, making it another big application field after the aerospace industry. However, due to constraints such as performance cost and other factors, the progress of application promotion is slow. At present, it is necessary to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/14
CPCB23P15/14C22C1/02C22C14/00C22F1/183C23C24/103
Inventor 何伟
Owner 山东文远石油装备有限责任公司
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