阅读说明：本技术 时速420km/h高速铁路制动用粉末烧结闸片 (Powder sintered brake pad for braking high-speed railway at speed of 420km/h ) 是由 赵艳晶 于 2020-12-29 设计创作，主要内容包括：本发明涉及420Km/h高速铁路制动用粉末烧结闸片的制备方法,本发明所要解决的问题是制造一种适用于在时速420Km/h的列车上使用的制动闸片。本发明的技术方案是：材料的质量份数比为铝粉：2%,锡粉：1%,碳化硅：2%,二氧化硅：3%,氧化铝粉：1%,铜粉50%-65%、铁粉10%-20%、二硫化钼4%-6%、镍粉7%-10%、钨粉4%-8%、石墨粉8%-16%；本发明的优点是克服了橡胶类制品散热慢的问题,能够对高速运动的机车进行制动,由于混铜较多在保持紧急制动时能够保证在一定形变下进行制动的效果,由于时粉末压制其硬度能够保证在形变后恢复如初的效果。(The invention relates to a preparation method of powder sintered brake pad for 420Km/h high-speed railway brake, and aims to solve the problem of manufacturing a brake pad suitable for a train with the speed of 420Km/h per hour. The technical scheme of the invention is as follows: the material comprises the following components in parts by weight: 2%, tin powder: 1%, silicon carbide: 2%, silica: 3%, alumina powder: 1 percent of copper powder, 50 to 65 percent of iron powder, 10 to 20 percent of iron powder, 4 to 6 percent of molybdenum disulfide, 7 to 10 percent of nickel powder, 4 to 8 percent of tungsten powder and 8 to 16 percent of graphite powder; the invention has the advantages that the problem of slow heat dissipation of rubber products is solved, the locomotive moving at high speed can be braked, the braking effect under certain deformation can be ensured when emergency braking is kept due to more copper mixing, and the original effect can be recovered after deformation due to the hardness of the powder pressed.)

1. A powder sintered brake pad for braking a high-speed railway at a speed of 420km/h is characterized by comprising the following components: the material comprises the following components in parts by weight: 2%, tin powder: 1%, silicon carbide: 2%, silica: 3%, alumina powder: 1 percent of copper powder, 50 to 65 percent of iron powder, 10 to 20 percent of iron powder, 4 to 6 percent of molybdenum disulfide, 7 to 10 percent of nickel powder, 4 to 8 percent of tungsten powder and 8 to 16 percent of graphite powder.

2. The method for preparing the powder sintered brake pad for the high-speed railway brake at the speed of 420Km/h per hour according to claim 1, which is characterized by comprising the following steps: 1) sequentially adding iron powder, copper powder, tungsten powder, nickel powder, aluminum powder, tin powder, graphite powder, molybdenum disulfide, silicon dioxide, silicon carbide and alumina powder into a manual premix in a mixing barrel for 30 minutes, and then putting the premixed materials into a mixer rotating at 360 degrees for mixing for 5 hours;

2) detecting the mixed raw materials obtained in the first step, sending the mixed raw materials into a pressing process after the mixed raw materials are qualified, pressing at normal temperature, firstly putting the fabric and then putting the base material into the pressing process for pressing and forming, wherein the pressing pressure is 10MPa, the pressure maintaining time is 15S, a full-automatic press is selected, and the steel backing and the friction body are directly formed;

3) sending the semi-finished product obtained in the second step into a sintering process, sintering by using a pressurized sintering furnace, keeping the temperature at 1000 ℃, keeping the temperature for 3 hours and keeping the pressure at 5Mpa, and protecting by using hydrogen in the sintering furnace;

4) checking whether the sintered product is qualified or not, re-pressing the product with the size deviation according to the second step, and controlling the size of the product;

5) after various physical and mechanical properties of the product reach the standard, assembling brake pads according to the sequence requirements of the framework, the steel backing and the friction body; and carrying out final inspection after the assembly is finished to obtain a finished product.

Technical Field

The invention belongs to a high-speed railway braking device, and particularly relates to a powder sintered brake pad for braking a high-speed railway at a speed of 420 km/h.

Background

Because aluminum alloy brake discs are intended for use in high speed railway vehicles, newly developed composite brake pads must possess higher coefficient of friction, less wear, and better heat dissipation and heat fade. The existing brake system of the high-speed railway train in China mostly uses metal sintered brake pads, has large specific gravity, large energy consumption and high hardness, is easy to generate noise during braking and is also easy to damage wheels; brake pads produced by the existing synthetic brake pad manufacturers in China are generally suitable for cast iron brake discs, for example, high-speed railway vehicles used for mounting aluminum alloy brake discs, the friction coefficient, the wear rate, the heat dissipation, the heat fading property and the like cannot meet the technical index requirements, and serious potential safety hazards exist, so that the brake pads suitable for the aluminum alloy brake discs need to be developed in order to respond to the design concept of light weight.

The invention aims to solve the technical problem of manufacturing a brake pad suitable for a train with the speed of 420Km/h per hour.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention aims to manufacture a powder sintered brake pad for braking a high-speed railway at the speed of 420 km/h.

The invention aims to provide a powder sintered brake pad for braking a high-speed railway at a speed of 420km/h, which is realized by the following technical scheme and is characterized by comprising the following components: the material comprises the following components in parts by weight: 2%, tin powder: 1%, silicon carbide: 2%, silica: 3%, alumina powder: 1 percent of copper powder, 50 to 65 percent of iron powder, 10 to 20 percent of iron powder, 4 to 6 percent of molybdenum disulfide, 7 to 10 percent of nickel powder, 4 to 8 percent of tungsten powder and 8 to 16 percent of graphite powder.

The preparation method of the powder sintered brake pad for 420Km/h high-speed railway braking is characterized by comprising the following steps: 1) sequentially adding iron powder, copper powder, tungsten powder, nickel powder, aluminum powder, tin powder, graphite powder, molybdenum disulfide, silicon dioxide, silicon carbide and alumina powder into a manual premix in a mixing barrel for 30 minutes, and then putting the premixed materials into a mixer rotating at 360 degrees for mixing for 5 hours;

2) and (3) detecting the mixed raw materials obtained in the first step, sending the mixed raw materials into a pressing process after the mixed raw materials are qualified, pressing at normal temperature, and putting the fabric and the base material into the mixed raw materials for pressing and forming. Pressing pressure is 10MPa, pressure maintaining time is 15S, a full-automatic press is selected, and the steel back and the friction body are directly formed;

3) sending the semi-finished product obtained in the second step into a sintering process, sintering by using a pressurized sintering furnace, keeping the temperature at 1000 ℃, keeping the temperature for 3 hours and keeping the pressure at 5Mpa, and protecting by using hydrogen in the sintering furnace;

4) checking whether the sintered product is qualified or not, re-pressing the product with the size deviation according to the second step, and controlling the size of the product;

5) after various physical and mechanical properties of the product reach the standard, assembling brake pads according to the sequence requirements of the framework, the steel backing and the friction body; and carrying out final inspection after the assembly is finished to obtain a finished product.

The invention has the advantages that: the problem of rubber class goods heat dissipation slow is overcome, can brake the locomotive of high-speed motion, because mix the effect that the copper can guarantee braking under certain deformation when keeping emergency braking more, because its hardness of powder suppression can guarantee to resume as before effect after the deformation.

Detailed Description

The present invention will be described in detail with reference to the following examples.

The material comprises the following components in parts by weight: 2%, tin powder: 1%, silicon carbide: 2%, silica: 3%, alumina powder: 1 percent of copper powder, 50 to 65 percent of iron powder, 10 to 20 percent of iron powder, 4 to 6 percent of molybdenum disulfide, 7 to 10 percent of nickel powder, 4 to 8 percent of tungsten powder and 8 to 16 percent of graphite powder.

The preparation method of the powder sintered brake pad for 420Km/h high-speed railway braking is characterized by comprising the following steps: 1) sequentially adding iron powder, copper powder, tungsten powder, nickel powder, aluminum powder, tin powder, graphite powder, molybdenum disulfide, silicon dioxide, silicon carbide and alumina powder into a manual premix in a mixing barrel for 30 minutes, and then putting the premixed materials into a mixer rotating at 360 degrees for mixing for 5 hours;

2) and (3) detecting the mixed raw materials obtained in the first step, sending the mixed raw materials into a pressing process after the mixed raw materials are qualified, pressing at normal temperature, and putting the fabric and the base material into the mixed raw materials for pressing and forming. Pressing pressure is 10MPa, pressure maintaining time is 15S, a full-automatic press is selected, and the steel back and the friction body are directly formed;

3) sending the semi-finished product obtained in the second step into a sintering process, sintering by using a pressurized sintering furnace, keeping the temperature at 1000 ℃, keeping the temperature for 3 hours and keeping the pressure at 5Mpa, and protecting by using hydrogen in the sintering furnace;

4) checking whether the sintered product is qualified or not, re-pressing the product with the size deviation according to the second step, and controlling the size of the product;

5) after various physical and mechanical properties of the product reach the standard, assembling brake pads according to the sequence requirements of the framework, the steel backing and the friction body; and carrying out final inspection after the assembly is finished to obtain a finished product.

The above description is only an embodiment of the present invention, and those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.