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Preparation method of ultra-fine spherical nickel coated titanium composite powder

A composite powder and nickel-coated technology, which is applied in liquid chemical plating, coating, metal material coating process, etc., can solve the problems of irregular powder shape, large deformation of sintered products, and low packing density, so as to achieve small sintering deformation , High bulk density and low oxygen content

Active Publication Date: 2013-01-02
江苏金物新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The raw material powders used in the preparation of titanium-nickel alloys by traditional powder metallurgy methods are mainly simple mixed powders, pre-alloyed powders, alloy powders, etc., which have irregular powder shapes, poor fluidity, low bulk density, high oxygen content, large deformation of sintered products, and post-sintering. More processing, and the use of spherical powder can solve the above problems

Method used

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  • Preparation method of ultra-fine spherical nickel coated titanium composite powder

Examples

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Embodiment 1

[0023] Weigh 20 g of 40 μm titanium hydride powder. First soak in alcohol for 10 minutes, remove the upper solution, then soak in 10g / L stannous chloride hydrochloric acid solution for 30 minutes, remove the upper solution, wash with deionized water until neutral; finally soak it in 10g / L Soak in silver nitrate solution for 12 hours, remove the upper solution, wash with deionized water 2-3 times, filter and dry.

[0024] Weigh 30g of nickel sulfate hexahydrate, dissolve it into 1000mL solution with deionized water, and prepare a 17.68g / L nickel sulfate solution, heat it in a water bath to 64°C, slowly add 12mL of hydrazine hydrate dropwise under rapid stirring, and then add the pretreatment Slowly add 2mol / L NaOH solution to adjust the pH to 9.7, stir quickly to ensure the uniformity of titanium hydride nickel plating, and slowly add 2mol / L NaOH solution to keep the pH at 9.3~9.7, Keep the water bath temperature at 80°C. After coating for 2 hours, take out the titanium hydri...

Embodiment 2

[0028] Weigh 30 g of 50 μm titanium hydride powder. First soak in alcohol for 12 minutes to remove the upper layer solution, then soak in 11g / L stannous chloride hydrochloric acid solution for 35 minutes, remove the upper layer solution, wash with deionized water until neutral; finally soak it in 11g / L stannous chloride hydrochloric acid solution Soak in silver nitrate solution for 13 hours, remove the upper solution, wash with deionized water 2-3 times, filter and dry.

[0029] Weigh 30g of nickel sulfate hexahydrate, dissolve it into 1000mL solution with deionized water, and prepare a 17.68g / L nickel sulfate solution, heat it in a water bath to 74°C, slowly add 12mL of hydrazine hydrate dropwise under rapid stirring, and then add the pretreatment Slowly add 2mol / L NaOH solution to adjust the pH to 9.5, stir quickly to ensure the uniformity of titanium hydride nickel plating, and slowly add ammonia solution to keep the pH at 9.3~9.7, and ensure that the temperature of the wat...

Embodiment 3

[0033] Weigh 15 g of 60 μm titanium hydride powder. First soak in alcohol for 13 minutes, remove the upper solution, then soak in 8g / L stannous chloride hydrochloric acid solution for 45 minutes, remove the upper solution, wash with deionized water until neutral; finally soak it in 8g / L Soak in silver nitrate solution for 15 hours, remove the upper solution, wash with deionized water 2-3 times, filter and dry.

[0034] Weigh 30g of nickel sulfate hexahydrate, dissolve it into 1000mL solution with deionized water, and prepare a 17.68g / L nickel sulfate solution, heat it in a water bath to 80°C, slowly add 9mL of hydrazine hydrate dropwise under the condition of rapid stirring, and then add the pretreatment Slowly add 2mol / L KOH solution to the titanium hydride powder, adjust the pH to 9.0, stir quickly to ensure the uniformity of titanium hydride nickel plating, and slowly add 2mol / L KOH solution to keep the pH at 8.8~9.2, Keep the water bath temperature at 90°C. After coating...

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Abstract

The invention provides a preparation method of an ultra-fine spherical nickel coated titanium composite powder, belonging to the manufacturing field of metallic powder material (compound). The preparation method comprises the following steps of: after pre-processing the raw material titanium hydride powder, firstly performing chemical nickel-plating; after radio-frequency plasma spheroidizing, performing dehydrogenation on the titanium hydride powder with large-particles; breaking the powder into ultra-fine spherical powder; and simultaneously reacting the nickel coated on the surface with titanium to obtain the spherical powder coated with nickel on the surface; and obtaining purified ultra-fine spherical nickel coated titanium composite powder after vacuum heat treatment. The preparation method has the characteristics of low oxygen content of power, uniform thickness of the nickel layer coated on the surface, high apparent density, good fluidity, short processing time, and the like,and the short procedure preparation of material is realized.

Description

technical field [0001] The invention relates to the field of manufacturing metal powder materials (composites), and in particular provides a method for preparing ultrafine spherical nickel-coated titanium composite powders. Background technique [0002] As an important titanium alloy, titanium-nickel alloy has the advantages of high strength, low specific gravity, fatigue resistance, corrosion resistance, wear resistance, low magnetism, non-toxicity, and good tissue compatibility. It is widely used in industry, medical treatment, biological etc. The traditional preparation methods of titanium-nickel alloy mainly include casting method, powder metallurgy method, etc. Among them, the titanium-nickel alloy prepared by casting method has problems such as composition segregation, coarse grain size, and large processing allowance. Powder metallurgy method uses powder as raw material, and presses After molding, sintering to obtain a product with a near-net size, which has the char...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/00B22F1/02C23C18/34
Inventor 郭志猛刘祥庆马璨盛艳伟杨芳
Owner 江苏金物新材料有限公司
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