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Cobalt-chromium-molybdenum-tungsten alloy powder as well as preparation method and application thereof

A cobalt-chromium-molybdenum-molybdenum-tungsten alloy technology, which is applied in the field of cobalt-chromium-molybdenum-tungsten alloy powder and its preparation, can solve the problem of affecting the performance of the final product by melting and forming the metal powder, the high production cost of the plasma rotary atomization method, and the fine-grained powder yield. Low-level problems, to achieve the effect of high sphericity, small particle size and narrow particle size distribution

Inactive Publication Date: 2018-10-26
GUANGDONG INST OF MATERIALS & PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing gas atomization method has defects such as high impurity content, powder particle adhesion, many satellite balls, and poor fluidity, which seriously affect the selective laser melting forming of metal powder and the performance of the final product; while the production cost of the plasma rotary atomization method is relatively high. High, low yield of fine-grained powder, which is not conducive to industrial batch application

Method used

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  • Cobalt-chromium-molybdenum-tungsten alloy powder as well as preparation method and application thereof
  • Cobalt-chromium-molybdenum-tungsten alloy powder as well as preparation method and application thereof

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preparation example Construction

[0018] The preparation method of the cobalt-chromium-molybdenum-tungsten alloy powder provided by the embodiment of the present invention comprises the following steps: melting the cobalt-chromium-molybdenum-tungsten raw material, atomizing, sieving, and retaining the powder particles with a particle size of 15-53 μm to obtain the cobalt-chromium-molybdenum-tungsten alloy powder .

[0019] Cobalt chromium molybdenum tungsten raw materials include the following components in weight percentage: 58-70wt% of Co; 23-27wt% of Cr; 4-6wt% of Mo; 4-6wt% of W; <1.5wt% of Si; The amount is impurity.

[0020] For reference, the above cobalt chromium molybdenum tungsten raw materials may include the following components in weight percentage: 59-69wt% Co; 24-25wt% Cr; 4.5-5.5wt% Mo; 4.5-5.5wt% W; <1.5wt% Si; the balance is impurities.

[0021] The cobalt-chromium-molybdenum-tungsten alloy with the above ratio has better wear resistance, corrosion resistance and high temperature oxidation ...

Embodiment 1

[0036] Put cobalt, chromium, molybdenum and tungsten raw materials into a vacuum intermediate frequency induction furnace, vacuumize the melting chamber and atomization chamber, and energize and heat the leaking package in the middle of the resistor and the melting furnace at the same time. The temperature of the middle leakage bag is controlled at 1100°C. The cobalt, chromium, molybdenum and tungsten raw materials in the vacuum intermediate frequency induction furnace are refined under the condition of 1600°C to obtain molten metal.

[0037] The above cobalt chromium molybdenum tungsten raw material contains the following components by weight percentage: 58wt% Co; 23wt% Cr; 4wt% Mo; 4wt% W; 1.4wt% Si;

[0038] First close the main vacuum system, and pass the first inert gas into the vacuum intermediate frequency induction furnace. After opening the atomization inlet valve and the leakage valve of the middle leakage bag, turn on the exhaust fan, and pour the molten metal into...

Embodiment 2

[0043] Put cobalt, chromium, molybdenum and tungsten raw materials into a vacuum intermediate frequency induction furnace, vacuumize the melting chamber and atomization chamber, and energize and heat the leaking package in the middle of the resistor and the melting furnace at the same time. The temperature of the middle leakage bag is controlled at 1200°C. The cobalt, chromium, molybdenum and tungsten raw materials in the vacuum intermediate frequency induction furnace are refined under the condition of 1700°C to obtain molten metal.

[0044] The above cobalt chromium molybdenum tungsten raw material contains the following components by weight percentage: 70wt% Co; 27wt% Cr; 6wt% Mo; 6wt% W; 1.3wt% Si;

[0045] First close the main vacuum system, and pass the first inert gas into the vacuum intermediate frequency induction furnace. After opening the atomization inlet valve and the leakage valve of the middle leakage bag, turn on the exhaust fan, and pour the molten metal into...

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Abstract

The invention relates to cobalt-chromium-molybdenum-tungsten alloy powder as well as a preparation method and application thereof, and belongs to the field of metal additive manufacturing. The preparation method comprises the following steps that smelting is carried out on a cobalt-chromium-molybdenum-tungsten raw material, atomizing is carried out, screening is carried out, and powder particles with the particle size of 15-53 micrometers are reserved to obtain the cobalt-chromium-molybdenum-tungsten alloy powder. The cobalt-chromium-molybdenum-tungsten raw material comprises the following components of, by weight, 58-70 wt% of Co, 23-27 wt% of Cr, 4-6 wt% of Mo, 4-6 wt% of W, less than 1.5 wt% of Si and the balance impurities. The preparation method is relatively simple, and therefore, the impurity content and satellite balls can be reduced, the fluidity of the powder can be improved, the yield of the powder can also be improved, and the industrial batch application is facilitated; and the obtained powder is small in particle size, narrow in particle size distribution, high in sphericity, good in mobility and high in apparent density, so that cobalt-chromium-molybdenum-tungsten alloy products with excellent performances can be conveniently obtained when the powder is used for the selective laser melting additive manufacturing.

Description

technical field [0001] The invention relates to the field of metal additive manufacturing, and in particular to a cobalt-chromium-molybdenum-tungsten alloy powder and a preparation method and application thereof. Background technique [0002] Metal additive manufacturing technology uses metal powder / wire as raw material, high-energy beam (laser / electron beam / arc / plasma beam, etc.) Under the control of software and numerical control system, materials are melted and piled up layer by layer to manufacture high-performance metal components. Compared with traditional metal parts processing technology, metal additive manufacturing technology has many advantages, such as near-net shape of parts, small post-processing allowance, high material utilization rate; rapid free forming without molds, complex parts can be manufactured, and the manufacturing cycle is short Wait. [0003] Selective Laser Melting (SLM) is an important method of metal additive manufacturing. It is developed f...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F1/00C22C19/07
CPCC22C19/07B22F9/082B22F2009/0808B22F1/05
Inventor 曾克里罗浩翁廷宗伟宋信强朱杰李志周晚珠李响宋仁金潘超梅
Owner GUANGDONG INST OF MATERIALS & PROCESSING
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