TWI550098B - Nickel boron porcelain material and its manufacturing method - Google Patents

Description

Nickel boron ceramic material and manufacturing method thereof

The invention relates to a porcelain gold material, in particular to a nickel boron ceramic gold material produced by a mechanical pulverization method and a manufacturing method thereof.

Cemented carbides or cermets are composite materials composed of ceramics and metals. Titanium carbide (TiC) and tungsten carbide (WC) are the main components. Nickel, molybdenum or other iron-based liquid phase is added. The bonding is made of a metal material and is sintered by a liquid phase of a metal. Porcelain gold material can compensate the brittleness of ceramic materials, not only high hardness (HV 1500 or above), but also good wear resistance. It is very suitable for high-speed precision machining of steel and light alloy materials, and has been gradually reused in manufacturing.

The metal liquid phase sintering process comprises mixing the same kind or several metal powders (or mixing of the metal powder and the non-metal powder), press-forming the powder, and sintering in the presence of the liquid phase and the solid state. Compared with the traditional metal casting method, the advantages are that it can be mass-produced, the product process does not require machining, the chemical composition of the product is uniform, and the high melting point material can be manufactured; however, the metal powder raw material required for liquid phase sintering is The price is quite expensive. The manufacturing method of the metal powder is divided into a mechanical manufacturing method, an electrolytic method, a reduction method, and an atomization manufacturing method. Among them, the mechanical manufacturing method is to obtain a large amount of waste material generated by metal processing, and obtain finer powder particles by cutting or/and grinding, and the powder characteristics are difficult to control, but are favorable for high melting point materials such as ceramic materials; When the molten metal alloy solution is passed through a nozzle and then blown out with high-speed air, water or nitrogen, the metal is sprayed in a mist, and then rapidly cooled to solidify into a powder. This method is usually used. For the production of low melting point metal powders, such as aluminum, tin.

The applicant of the present invention has proposed a nickel-boron ceramic material which can simplify the process of the nickel-boron-gold material and at the same time take into consideration the product characteristics, and a manufacturing method thereof.

In view of the above problems, the main object of the present invention is to provide a nickel boron ceramic material and a method for manufacturing the same, which can be directly mixed with titanium carbide particles by mechanically pulverizing the nickel boron alloy material into nickel boron alloy particles. Then, it is made of nickel-boron porcelain gold material. This method is very simple, but it does not reduce the mechanical properties and chemical properties of the product, which will shorten the processing flow and save process time and production cost.

In order to achieve the above object, the present invention provides a method for producing a nickel boron ceramic material, the first step of which is to provide a nickel boron alloy raw material, and then, by using a mechanical pulverization method, the nickel boron alloy raw material is processed into nickel boron alloy particles, and then After the nickel boron alloy particles are sufficiently mixed with the titanium carbide particles, they are subjected to pressure forming and sintered into a nickel boron ceramic material.

The nickel-boron alloy raw material used in the present invention has a particle diameter of about 100 millimeters (mm) and is processed by a mechanical pulverization method, and the mechanical pulverization method is performed by processing the nickel-boron alloy raw material without sieving directly by a pulverizer. After pulverization, it is ground into nickel boron alloy particles by a grinder; or the nickel boron alloy raw material is processed without being sieved and pulverized, and directly ground into nickel boron alloy particles by a grinder. After grinding, the nickel boron alloy particles have a particle size ranging from about 50 to 300 micrometers (um).

Moreover, the present invention also provides a nickel boron ceramic gold material formed by nickel boron alloy particles and titanium carbide particles, wherein the nickel boron alloy particles are formed by mechanically pulverizing the nickel boron alloy raw material, and then the titanium carbide particles are sufficiently mixed. Thereafter, press forming is performed and sintered into a nickel boron ceramic material.

In other words, the present invention uses a nickel-boron alloy raw material having a particle diameter of about 100 millimeters (mm), and directly forms a nickel-boron alloy particle having a particle diameter to be refined by a mechanical pulverization method, and subsequently adding titanium carbide. The particles are thoroughly mixed and then subjected to pressure sintering to easily obtain a nickel-boron porcelain gold material having good mechanical properties and chemical properties. Compared with the conventional mechanical manufacturing method for pulverizing a large amount of waste generated by metal processing, it is necessary to carry out atomization of molten metal and high-pressure spray to produce metal powder, and the present invention utilizes a mechanical pulverization method to use a nickel-boron alloy raw material. The method of forming the nickel-boron alloy particles can achieve the simplification of the production process without lowering the product characteristics, thereby reducing the production cost.

The purpose, technical content, features and effects achieved by the present invention will be more readily understood by the detailed description of the embodiments.

Fig. 1 is a flow chart showing the steps of a method for producing a nickel boron ceramic material according to the present invention.

2A to 2E are micrographs of a scanning electron microscope (SEM) of a nickel-boron ceramic material obtained by a general atomization method and the mechanical pulverization method of the present invention.

Referring to Fig. 1, there is shown a flow chart of the steps of the method for producing the nickel boron ceramic material of the present invention. Hereinafter, each step of the present invention will be described in detail. First, in step S100, a nickel-boron alloy raw material is provided. The nickel-boron alloy raw material has a particle diameter of about 100 millimeters (mm), and the composition of the nickel-boron alloy raw material comprises 15% by weight of chromium, 4% of iron, 3% of boron, 4% of bismuth and 1% of Carbon, the rest is nickel.

Then, in step S200, the nickel boron alloy raw material is processed into nickel boron alloy particles by a mechanical pulverization method, and the nickel boron alloy particles have a particle diameter ranging from about 50 to 300 micrometers (um). The mechanical pulverization method of the present invention may comprise steps of pulverization, grinding and sieving, and may be separately It is carried out using instruments such as a pulverizer, a grinder, and a sieving machine. In the present invention, the pulverized particle size on the pulverizer can be used to control the size of the pulverized particles, and then the grinding machine can be used to grind according to different feed amounts and particle sizes, and the granules can be used to find the particles of the required particle size. And the particles before grinding can also be pulverized and then ground. Through the experimental method, the present invention finds that the nickel-boron alloy raw material having a particle diameter of about 100 millimeters (mm) can be directly ground into nickel-boron alloy particles, and can have a good grinding effect without sieving and pulverizing. Process time can be greatly saved. In addition, the nickel-boron alloy raw material can be taken without sieving, and the pulverization can be carried out first, and the grinding can be directly performed without pulverizing to a small particle size (for example, 4 mm, 2.5 mm or 1 mm), which can reduce the abrasion damage of the grinding machine. The grinding effect is also quite good, which can increase the life of the grinding machine. In addition, the grinding machine speed setting can be about 1200~1400RPM, the lower speed grinding effect is better, and the higher speed can increase the life of the grinding machine.

After the grinding is completed, in step S300, the nickel boron alloy particles and the titanium carbide particles are sufficiently mixed in a ratio of 80% by weight to 20% by weight, respectively, and then at a pressure of 1400-1750 bar (BAR) and 1100-1300 ° C. At a temperature, press forming and sintering, a nickel boron ceramic gold material can be obtained; wherein the titanium carbide particles have a particle size ranging from about 3 to 5 micrometers (um).

Further, the present invention compares nickel-boron porcelain gold materials prepared by the general atomization method and the mechanical pulverization method of the present invention by several experiments.

As shown in Figures 2A and 2C, the microstructure of a scanning electron microscope (SEM) of a nickel-boron ceramic material obtained by an atomization method has magnifications of 100 times and 700 times, respectively; 2D and 2E are micrographs of a scanning electron microscope (SEM) of a nickel-boron ceramic material obtained by a mechanical pulverization method, and the magnifications thereof are 100 times, 700 times, and 2000 times, respectively.

In addition, Tables 1 to 4 are mechanical properties of the present invention measured by transverse rupture strength (TRS) and impact strength. Among them, Table 1 and Table 3 are the transverse rupture strength (TRS) test results of the nickel-boron porcelain gold material obtained by atomization method and mechanical pulverization method respectively; Table 3 and Table 4 are respectively fog The impact strength test results of the nickel-boron porcelain gold material obtained by the chemical method and the mechanical pulverization method.

As shown in Table 5, the nickel-boron porcelain gold material prepared by the atomization method and the mechanical pulverization method is a corrosion result of a 3.5 wt% sodium chloride solution as an etching solution. At the same time, Table 6 lists the atomization method and The nickel-boron porcelain gold material obtained by the mechanical pulverization method was etched with 0.15 M hydrochloric acid as an etching solution. Among them, AISI H13 was used as a control group.

As shown in Table 7, the results of the abrasion test were performed on the nickel-boron porcelain gold material obtained by the atomization method and the mechanical pulverization method.

It can be seen from the above experimental results that the porosity of the nickel-boron porcelain gold material obtained by the atomization method and the mechanical pulverization method is comparable, and there is no significant difference in mechanical properties. Furthermore, the nickel-boron porcelain gold material obtained by the mechanical pulverization method has more obvious and fine titanium carbide (TiC) dispersed in the nickel (Ni) substrate, which contributes to the improvement of mechanical properties. In addition, in the nature of electrochemical corrosion, the polarization resistance and corrosion current of the two are not much different, but the powder of nickel-boron porcelain gold material prepared by mechanical pulverization is more complete, so it is slightly more resistant. Corroded some. In addition, in the abrasion test, the wear volume of the two is obtained by mechanical pulverization. Porcelain gold materials have less abrasion volume and better wear resistance at high rotational speeds, while weight loss is not significantly representative.

In summary, according to the nickel-boron porcelain gold material provided by the present invention and the method for producing the same, the nickel-boron alloy raw material is processed into a nickel-boron alloy particle having a fine particle diameter by a mechanical pulverization method, and then the titanium carbide particles are sufficiently added. By mixing and then sintering by pressure, it is easy to obtain a nickel-boron porcelain gold material having good mechanical properties and chemical properties. Therefore, the process of the present invention does not require melting as compared with the conventional mechanical manufacturing method in which a large amount of waste generated by metal processing is pulverized, or the atomization method of molten metal and high-pressure spray is required to produce a metal powder. The steps of metal and high-pressure spray are relatively simple, the whole process is simple, easy to operate and high in efficiency. The mechanical properties and chemical properties of the prepared nickel-boron-gold material are relatively good, which can shorten the process time and reduce production. The purpose of the cost.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Therefore, any changes or modifications of the features and spirits of the present invention should be included in the scope of the present invention.

Claims (12)

A method for producing a nickel boron ceramic gold material, comprising the steps of: (a) providing a nickel boron alloy raw material; (b) treating the nickel boron alloy raw material into a plurality of nickel boron alloy particles by a mechanical pulverization method; and (c) After the nickel boron alloy particles are sufficiently mixed with the plurality of titanium carbide particles, they are subjected to pressure forming and sintered into the nickel boron ceramic gold material; wherein the nickel boron alloy particles have a particle size ranging from 50 to 300 micrometers (um). The titanium carbide particles have a particle size ranging from 3 to 5 micrometers (um), and the nickel boron alloy particles and the titanium carbide particles are respectively mixed at a ratio of 80% by weight to 20% by weight. The method for producing a nickel boron ceramic material according to claim 1, wherein the nickel boron alloy raw material has a particle diameter of 100 mm. The method for producing a nickel-boron-ceramic material according to claim 1, wherein the step (b) is: treating the nickel-boron alloy raw material without sieving directly by pulverizing, and then grinding the same by using a grinder. Nickel boron alloy particles. The method for producing a nickel boron ceramic material according to claim 1, wherein the step (b) is: treating the nickel boron alloy raw material without sieving and pulverizing, and directly grinding the nickel boron alloy particles by using a grinder. . The method for producing a nickel boron ceramic material according to claim 1, wherein the composition of the nickel boron alloy raw material comprises 15% by weight of chromium, 4% of iron, 3% of boron, 4% of bismuth and 1% by weight. The carbon and the rest are nickel. The method for producing a nickel boron ceramic material according to claim 1, wherein the step (c) is carried out by pressing and sintering at a pressure of 1400-1750 bar (BAR) and a temperature of 1100-1300 °C. A nickel-boron porcelain gold material comprising: a plurality of nickel-boron alloy particles formed by mechanically pulverizing a nickel-boron alloy raw material; and a plurality of titanium carbide particles, which are thoroughly mixed with the nickel-boron alloy particles Pressurizing and sintering into the nickel boron ceramic gold material; wherein the nickel boron alloy particles have a particle size ranging from 50 to 300 micrometers (um), and the titanium carbide particles have a particle diameter ranging from 3 to 5 micrometers (um) And the nickel boron alloy particles and the titanium carbide particles are respectively mixed at a ratio of 80% by weight to 20% by weight. The nickel boron ceramic gold material according to claim 7, wherein the nickel boron alloy raw material has a particle diameter of 100 mm (mm). The nickel boron ceramic material according to claim 7, wherein the nickel boron alloy particles are processed by the nickel boron alloy raw material without being sieved, directly pulverized by a pulverizer, and then ground by a grinder. The nickel boron ceramic material according to claim 7, wherein the nickel boron alloy particles are processed by the nickel boron alloy raw material without being sieved and pulverized, and directly ground by a grinder. The nickel boron ceramic gold material according to claim 7, wherein the composition of the nickel boron alloy raw material comprises 15% by weight of chromium, 4% of iron, 3% of boron, 4% of bismuth and 1% of carbon, The rest is nickel. The nickel boron ceramic material according to claim 7, wherein the titanium carbide particles and the nickel boron alloy particles are pressed and sintered at a pressure of 1400-1750 bar (BAR) and a temperature of 1100-1300 °C. .