WO2017070806A1

WO2017070806A1 - High-strength titanium carbide particle-reinforced copper-based composite material and preparation method therefor

Info

Publication number: WO2017070806A1
Application number: PCT/CN2015/000866
Authority: WO
Inventors: 孙飞; 赵勇; 埃里克斯⋅高登
Original assignee: 苏州列治埃盟新材料技术转移有限公司
Priority date: 2015-10-30
Filing date: 2015-12-04
Publication date: 2017-05-04
Also published as: CN105256170A

Abstract

A high-strength titanium carbide particle-reinforced copper-based composite material for a high-speed turbine of a locomotive and a preparation method therefor. The material is composed of the following components by volume percentage: 0.05% - 1.5% of high-purity titanium carbide with a purity of greater than 98%, and 98.5% - 99.95% of a copper alloy ZCuSn₁₀Pb₁. The high-strength titanium carbide particle-reinforced copper-based composite material is prepared by undergoing the steps of stirring, smelting, casting and the like.

Description

High-strength titanium carbide particle reinforced copper matrix composite material and preparation method thereof

Technical field

The invention relates to a particle reinforced copper matrix composite material and a preparation method thereof, in particular to a high strength titanium carbide particle reinforced copper matrix composite material for a high speed turbine of a locomotive.

Background technique

The national standard copper alloy material ZCuSn ₁₀ Pb ₁ is a multi-purpose tin bronze material with high hardness, excellent wear resistance, easy to produce seizure, good casting performance and machinability, in the atmosphere and fresh water. It has good corrosion resistance and is mainly used for manufacturing wear parts with high load (below 20MPa) and high sliding speed (8m/s), such as connecting rods, bushings, bushings, gears, turbines, etc. However, with the rapid development of China's high-speed railway, the material needs to increase its corresponding strength while meeting the manufacturing requirements of high-speed locomotive parts, so as to reduce the amount of wear in a certain period of time, thereby increasing its service life and reducing replacement. The frequency of parts and components reduces the corresponding operating costs and saves resources.

The high-purity titanium carbide powder is a titanium carbide material prepared by reacting titanium dioxide and carbon black in a carbon tube furnace or a frequency-modulated vacuum furnace through a hydrogen gas at a high temperature of 1600 ° C to 1800 ° C. Because titanium carbide has high hardness, high strength, good chemical stability, no hydrolysis, high temperature oxidation resistance, etc., it is an important raw material for the production of hard alloys, which can be used to manufacture wear-resistant materials, cutting tool materials, mechanical parts, etc. It can also produce bismuth of tin, lead, cadmium, zinc and other metals.

In summary, the new copper-based alloy composites that combine the advantages of high-purity titanium carbide and copper alloy ZCuSn ₁₀ Pb ₁ can meet the material requirements of high-speed turbines and other components of the locomotive to a certain extent.

Summary of the invention

The object of the present invention is to provide an effective improvement of the strength, wear resistance and corrosion resistance of the copper alloy ZCuSn ₁₀ Pb ₁ by improving the volume ratio between the high-purity titanium carbide and the copper alloy ZCuSn ₁₀ Pb ₁ and the preparation conditions. Strength titanium carbide particle reinforced copper matrix composite material and preparation method thereof.

In order to achieve the above object, the technical solution provided by the present invention is:

A high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive consisting of the following volume percentage components: high-purity titanium carbide with a purity greater than 98% 0.05-1.5%, copper alloy ZCuSn ₁₀ Pb ₁ 98.5- 99.95%.

Preferably, the high strength titanium carbide particle reinforced copper matrix composite of the present invention is composed of a volume percentage component of high purity titanium carbide 0.05% having a purity greater than 98% and a copper alloy ZCuSn ₁₀ Pb ₁ 99.95%.

Preferably, the high strength titanium carbide particle reinforced copper matrix composite of the present invention consists of a volume percent component of high purity titanium carbide 0.8% with a purity greater than 98% and a copper alloy ZCuSn ₁₀ Pb ₁ 99.2%.

Preferably, the high strength titanium carbide particle reinforced copper matrix composite of the present invention consists of a volume percent component of high purity titanium carbide 1.5% having a purity greater than 98% and a copper alloy ZCuSn ₁₀ Pb ₁ 98.5%.

Further, the high-purity titanium carbide is a powder particle.

Further, the copper alloy ZCuSn ₁₀ Pb _{1 is} composed of the following components by weight: 9.0-11.5% of tin ingot, 0.5-1.0% of phosphor bronze alloy, ≤0.75% of total impurity, and the balance being copper.

The invention provides a preparation method of a high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive, which has the following steps:

1) Preparation of copper alloy ZCuSn ₁₀ Pb ₁ : Electrolytic copper, phosphor bronze alloy, and tin ingot are smelted in an electric furnace according to the above weight ratio, the volume of the copper alloy liquid in the smelting is less than 90% of the volume of the electric furnace; the melting temperature is 1150-1200. °C, the time is 5-6h;

2) using a Spike direct reading spectrometer to perform a component test on the prepared copper alloy ZCuSn ₁₀ Pb ₁ liquid to determine that its chemical composition is within the above range;

3) placing high-purity titanium carbide particles in a volume percentage of 0.05-1.5% on the surface of the above-mentioned copper alloy ZCuSn ₁₀ Pb ₁ liquid, turning on the vibration device of the power frequency electric furnace and simultaneously stirring with a graphite rod to uniformly mix the two; Further raising the temperature of the electric furnace to 1200-1250 ° C and maintaining 50-60 min;

4) The finished high-strength titanium carbide particle reinforced copper-based composite material is kept in an electric furnace for a period of 1-1.5 hours; then the high-strength titanium carbide particle-reinforced copper-based composite material is cast into a high casting method. Intensity particle reinforced copper-based alloy composite bar, casting temperature is 1150-1200 ° C;

5) The high-strength particle-reinforced copper-based alloy composite bar after casting is surface-processed and packaged according to the factory standard.

Further, in the step 3, the volume fraction of the high-purity titanium carbide particles is 0.05%.

Further, in the step 3, the volume fraction of the high-purity titanium carbide particles is 0.8%.

Further, in step 3, the volume fraction of the high-purity titanium carbide particles is 1.5%.

With the above technical solutions, the beneficial effects of the present invention are as follows:

The invention uniformly distributes the high-purity titanium carbide powder in the copper alloy ZCuSn ₁₀ Pb ₁ material by the above-mentioned technical means, and utilizes the high hardness of the titanium carbide, the strength is strong, the chemical stability is good, the hydrolysis is not good, and the high-temperature oxidation resistance is good to make up. ₁ is a disadvantage of the copper alloy material ZCuSn ₁₀ Pb, copper alloys achieve ZCuSn ₁₀ Pb ₁ further improve performance of the materials. The high-strength titanium carbide particle reinforced copper-based composite material obtained by the invention has higher strength, hardness, wear resistance and corrosion resistance, and is applied to wear-resistant parts working under high load and high sliding speed, thereby Extend the service life of connecting rods, bushings, bushings, gears, and turbines.

DRAWINGS

1 is a flow chart of a method of the present invention for a high strength titanium carbide particle reinforced copper matrix composite for a high speed turbine of a locomotive.

detailed description

The high-strength titanium carbide particle reinforced copper-based composite material provided by the present invention and its preparation method are further described below with reference to the accompanying drawings and embodiments, but are not intended to limit the scope of application of the present invention.

Example 1

The high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive according to Embodiment 1 of the present invention, wherein the volume percentage of each component is 0.05% of high-purity titanium carbide powder having a purity of more than 98%, and the copper alloy ZCuSn ₁₀ Pb ₁ 99.95%.

The method for preparing a high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive according to Embodiment 1 of the present invention has the following steps (as shown in FIG. 1):

1) Preparation of copper alloy ZCuSn ₁₀ Pb ₁ : Electrolytic copper, phosphor bronze alloy and tin ingot are smelted in an electric furnace according to the standard GB/T 1176-1987. The volume of the copper alloy liquid in the smelting is less than 90% of the volume of the electric furnace. %; melting temperature is 1150 ° C, time is 5h;

2) The composition of the prepared copper alloy ZCuSn ₁₀ Pb ₁ liquid is detected by using a Spike direct reading spectrometer to determine the chemical composition within the requirements of the national standard;

3) Put high-purity titanium carbide into the surface of the above-mentioned copper alloy ZCuSn ₁₀ Pb ₁ liquid, turn on the vibration device of the power frequency electric furnace and simultaneously stir with a graphite rod to uniformly mix the two; further increase the temperature of the electric furnace to 1200 ° C and Hold for 50 minutes;

4) The finished high-strength titanium carbide particle reinforced copper-based composite material is kept in an electric furnace for 1 hour; then the high-strength titanium carbide particle-reinforced copper-based composite material is cast into high-strength particle reinforcement by continuous casting. Copper-based alloy composite bar, casting temperature is 1150 ° C;

Example 2

The high-strength titanium carbide particle-reinforced copper-based composite material for a high-speed turbine of a locomotive according to Embodiment 2 of the present invention, wherein the volume percentage of each component is 0.8% of high-purity titanium carbide powder having a purity of more than 98%, and the copper alloy ZCuSn ₁₀ Pb ₁ 99.2%.

The method for preparing a high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive according to Embodiment 2 of the present invention has the following steps (as shown in FIG. 1):

1) Preparation of copper alloy ZCuSn ₁₀ Pb ₁ : Electrolytic copper, phosphor bronze alloy and tin ingot are smelted in an electric furnace according to the standard GB/T 1176-1987. The volume of the copper alloy liquid in the smelting is less than 90% of the volume of the electric furnace. %; melting temperature is 1150 ° C, time is 5.5h;

3) placing high-purity titanium carbide on the surface of the above-mentioned copper alloy ZCuSn ₁₀ Pb ₁ liquid, turning on the vibration device of the power frequency electric furnace and simultaneously stirring with a graphite rod to uniformly mix the two; further raising the temperature of the electric furnace to 1225 ° C and Hold for 55 minutes;

Example 3

A high-strength titanium carbide particle-reinforced copper-based composite material for a high-speed turbine of a locomotive according to Embodiment 3 of the present invention, wherein a volume percentage of each component is 1.5% of a high-purity titanium carbide powder having a purity of more than 98%, and a copper alloy ZCuSn ₁₀ Pb ₁ 98.5%.

The method for preparing a high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive according to Embodiment 3 of the present invention has the following steps (as shown in FIG. 1):

1) Preparation of copper alloy ZCuSn ₁₀ Pb ₁ : Electrolytic copper, phosphor bronze alloy and tin ingot are smelted in an electric furnace according to the standard GB/T 1176-1987. The volume of the copper alloy liquid in the smelting is less than 90% of the volume of the electric furnace. %; melting temperature is 1200 ° C, time is 6h;

3) Put high-purity titanium carbide into the surface of the above-mentioned copper alloy ZCuSn ₁₀ Pb ₁ liquid, turn on the vibration device of the power frequency electric furnace and simultaneously stir with a graphite rod to uniformly mix the two; further increase the temperature of the electric furnace to 1250 ° C and Hold for 60 minutes;

4) The finished high-strength titanium carbide particle reinforced copper matrix composite material is carried out in an electric furnace Insulation, the time is 1.5h; then the high-strength titanium carbide particle-reinforced copper-based composite material is cast into a high-strength particle-reinforced copper-base alloy composite bar by continuous casting, and the casting temperature is 1200 ° C;

5) The high-strength particle-reinforced copper-based alloy composite bar after casting is subjected to surface car treatment and packaged according to the factory standard.

Comparative example 1

The copper alloy material with the traditional element cadmium and titanium is composed of cadmium containing 0.025% by weight of the total weight of the alloy material, titanium of 0.025% by weight of the total weight of the alloy material, and copper alloy ZCuSn ₁₀ Pb accounting for 99.95% of the total weight of the alloy material. ₁ . The above copper alloy material is prepared by a conventional heat treatment process, that is, a heat treatment process such as repeated annealing, tempering, and bonfire.

Comparative example 2

The copper alloy material with traditional elements of cadmium and titanium is composed of cadmium which is 0.5% of the total weight of the alloy material, 1.0% of the total weight of the alloy material, and the copper alloy ZCuSn ₁₀ Pb which accounts for 98.5% of the total weight of the alloy material. ₁ . The above copper alloy material is prepared by a conventional heat treatment process, that is, a heat treatment process such as repeated annealing, tempering, and bonfire.

The mechanical properties of the high-strength titanium carbide particle-reinforced copper-based composite material of the present invention and the conventional copper alloy materials of Comparative Examples 1 and 2 described above are shown in Table 1.

Table 1

It can be seen from the above Table 1 that the strength of the copper-based composite material (Example 1-3) using the titanium carbide particles of the present invention is significantly improved compared with the conventional copper alloy materials containing cadmium and titanium, and the wear resistance and Corrosion resistance has also been significantly improved.

The above-mentioned embodiments are merely illustrative of the embodiments of the present invention, and the description thereof is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

A high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive, characterized by comprising: a high-purity titanium carbide having a purity of more than 98%, 0.05-1.5%, a copper alloy ZCuSn 10 Pb 1 98.5-99.95%.
The high-strength titanium carbide particle-reinforced copper-based composite material according to claim 1, which is composed of the following components by volume: high-purity titanium carbide having a purity of more than 98% 0.05%, copper alloy ZCuSn 10 Pb 1 99.95 %.
The high-strength titanium carbide particle-reinforced copper-based composite material according to claim 1, which is composed of the following components by volume: high-purity titanium carbide having a purity of more than 98% 0.8%, copper alloy ZCuSn 10 Pb 1 99.2 %.
The high-strength titanium carbide particle-reinforced copper-based composite material according to claim 1, which is composed of the following components by volume: high-purity titanium carbide having a purity of more than 98%: 1.5%, copper alloy ZCuSn 10 Pb 1 98.5 %.
The high-strength titanium carbide particle-reinforced copper-based composite material according to any one of claims 1 to 4, wherein the high-purity titanium carbide is a powder particle.
The high-strength titanium carbide particle-reinforced copper-based composite material according to any one of claims 1 to 4, wherein the copper alloy ZCuSn 10 Pb 1 is composed of the following components by weight: 9.0-11.5% of tin ingot, Phosphorus copper alloy 0.5-1.0%, the total impurity is ≤0.75%, and the rest is copper.
A method for preparing a high-strength titanium carbide particle reinforced copper-based composite material for a high-speed turbine of a locomotive, characterized in that the method has the following steps:

1) preparing copper alloy ZCuSn 10 Pb 1 : electrolytic copper, phosphor bronze alloy, tin ingot according to the weight ratio of claim 6 is placed in an electric furnace for melting, the volume of the copper alloy liquid in the melting is less than 90% of the volume of the electric furnace; the melting temperature It is 1150-1200 ° C, the time is 5-6h;

2) performing component detection on the prepared copper alloy ZCuSn 10 Pb 1 liquid using a Spike direct reading spectrometer to determine that its chemical composition is within the scope of claim 6;

3) placing high-purity titanium carbide particles in a volume percentage of 0.05-1.5% on the surface of the above-mentioned copper alloy ZCuSn 10 Pb 1 liquid, turning on the vibration device of the power frequency electric furnace and simultaneously stirring with a graphite rod to uniformly mix the two; Further raising the temperature of the electric furnace to 1200-1250 ° C and maintaining 50-60 min;

4) The finished high-strength titanium carbide particle reinforced copper-based composite material is kept in an electric furnace for a period of 1-1.5 hours; then the high-strength titanium carbide particle-reinforced copper-based composite material is cast into a high casting method. Intensity particle reinforced copper-based alloy composite bar, casting temperature is 1150-1200 ° C;

5) The high-strength particle-reinforced copper-based alloy composite bar after casting is surface-processed and packaged according to the factory standard.
The preparation method according to claim 7, wherein in step 3, the volume fraction of the high-purity titanium carbide particles is 0.05%.
The preparation method according to claim 7, wherein in step 3, the volume fraction of the high-purity titanium carbide particles is 0.8%.
The production method according to claim 7, wherein in step 3, the volume fraction of the high-purity titanium carbide particles is 1.5%.