Preparation method of novel nickel-based material for petroleum valve rod

A technology for petroleum and valve stems, which is applied in the field of preparation of new nickel-based materials for petroleum valve stems. It can solve the problems of high processing costs and poor plasticity during hot processing, and achieve low processing costs, excellent high-temperature strength, metallographic structure and chemical properties. The effect of uniform composition

Inactive Publication Date: 2021-04-09
江苏新核合金科技有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings in the prior art and provide a new method for preparing nickel-based materials for petroleum valve stems, which is used to solve the problem of poor thermal processing plasticity and high processing costs of nickel-based materials for petroleum valve stems The problem

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  • Preparation method of novel nickel-based material for petroleum valve rod

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preparation example Construction

[0020] The invention provides a method for preparing a novel nickel-based material for petroleum valve stems, comprising the following steps:

[0021] S1 Vacuum smelting: The alloy raw materials are accurately proportioned according to the established weight ratio, and baked according to the process requirements. The return material is less than 30%, and the amount of other elements is strictly controlled. The vacuum smelting is carried out according to the high-temperature smelting process, and the carbon is strictly controlled. The content is brought in, the vacuum degree is less than 8 Pa during the melting period, Ni-Mg0.05% and rare earth 0.3kg / furnace are added during refining, Al and Ti small materials are added for deoxidation when the power is cut off after refining, and the composition is controlled. Temperature ≤ 8Pa, using no less than two high-temperature instant refining and one low-temperature long-term refining, the steel temperature is raised to 1580 ° C for 1-...

Embodiment 1

[0046] In a new type of nickel-based material for petroleum valve stems in Example 1 of the present invention, the weight percentages of each element are: C: 0.10%, Si: 0.30%, Mn: 0.20%, P: 0.010%, S: 0.010%, Cr: 10.0%, Co: 14.5%, W: 5.0%, Mo: 4.50%, Al: 3.90%, Ti: 1.50%, Fe: 1.0%, V: 0.30%, B: 0.015%, Ce: 0.010%, Cu: 0.050%, the balance is Ni and unavoidable impurities.

[0047] The preparation method of the nickel-based material for the novel petroleum valve rod of the present embodiment is as follows:

[0048] S1 Vacuum smelting: The alloy raw materials are accurately proportioned according to the established weight ratio, and baked according to the process requirements. The return material is less than 30%, and the amount of other elements is strictly controlled. The vacuum smelting is carried out according to the high-temperature smelting process, and the carbon is strictly controlled. The content is brought in, the vacuum degree is 7.8 Pa during the melting period, Ni-M...

Embodiment 2

[0054] In a new type of nickel-based material for petroleum valve stems in Example 2 of the present invention, the weight percentages of each element are: C: 0.08%, Si: 0.50%, Mn: 0.40%, P: 0.010%, S: 0.010%, Cr: 10.5%, Co: 15%, W: 5.5%, Mo: 5%, Al: 3.90-4.30%, Ti: 1.80%, Fe: 1.10%, V: 0.40%, B: 0.020%, Ce: 0.0150 %, Cu: 0.055%, the balance is Ni and unavoidable impurities.

[0055] The preparation method of the nickel-based material for the novel petroleum valve rod of the present embodiment is as follows:

[0056] S1 Vacuum smelting: The alloy raw materials are accurately proportioned according to the established weight ratio, and baked according to the process requirements. The return material is less than 30%, and the amount of other elements is strictly controlled. The vacuum smelting is carried out according to the high-temperature smelting process, and the carbon is strictly controlled. The content is brought in, the vacuum degree is 4.5 Pa during the melting period, N...

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Abstract

The invention provides a preparation method of a novel nickel-based material for a petroleum valve rod. The preparation method comprises the steps of vacuum smelting, electroslag remelting, forging, solution treatment and peeling. The method is reasonable in process design, the component proportion design of all raw materials is optimized, hot working plasticity is improved, the yield is high, the service life of an alloy is prolonged, meanwhile, return materials in a proper proportion are added into the raw materials, and the alloy material cost can be reduced.

Description

technical field [0001] The invention relates to the field of superalloy materials, in particular to a method for preparing a novel nickel-based material for petroleum valve stems. Background technique [0002] Superalloys refer to high-alloyed iron-based, nickel-based or cobalt-based austenitic metal materials that can withstand high temperatures above 600°C, withstand relatively large and complex stresses, and have surface stability. [0003] Among them, the GH4049 alloy is a Ni-Co-Cr-based precipitation hardening deformation superalloy, which is used below 950 degrees Celsius. The alloy has good oxidation resistance below 1000 degrees Celsius and high high temperature strength below 950 degrees Celsius. [0004] However, the nickel-based material GH4049 used for petroleum valve stems in the prior art has poor hot-working plasticity and high processing costs. Contents of the invention [0005] The purpose of the present invention is to solve the shortcomings in the prio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02C22B9/18C22F1/10
CPCC22B9/18C22C1/023C22C19/056C22F1/10
Inventor 邵兴明陈杰任国松戴雪琴黄月华华丽平
Owner 江苏新核合金科技有限公司
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