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A high temperature resistant connecting layer primer and its preparation method and application

A connecting layer and high temperature resistant technology, which is applied in mechanical equipment, friction linings, etc., can solve the problems of high temperature resistance difference defects, failure to meet the braking requirements of 450km/h high-speed trains, etc., achieve good bonding strength and avoid failure risks , to avoid the effect of corrosion failure

Active Publication Date: 2022-07-01
BEIJING TIANYISHANGJIA NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the friction material and the bottom material of the connecting layer of the steel back plate in the prior art cannot meet the braking requirements of the 450km / h high-speed train and the high temperature difference, thereby providing a High-temperature connection layer bottom material and its preparation method and application

Method used

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  • A high temperature resistant connecting layer primer and its preparation method and application
  • A high temperature resistant connecting layer primer and its preparation method and application

Examples

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Embodiment 1

[0032] This embodiment provides a high temperature resistant connection layer primer, the components of which include 15wt% Ni, 15wt% Fe, 0.5wt% Mo, 0.2wt% Nb, 1wt% Cr, and the balance is copper.

[0033] The preparation method of the above-mentioned connecting layer primer comprises the following steps,

[0034] Before smelting, all raw materials were pickled to remove surface oxides, placed at 50°C for 30min, and dried. Add Ni-Mo master alloy, Ni-Nb master alloy, Cr block, Ni block, Fe block, and Cu block into the smelting furnace in order from bottom to top. After all the raw materials are melted, the temperature is raised to 1500 ℃, add graphite blocks, keep the temperature for 30min, and use electromagnetic stirrer to stir at the same time to achieve alloying and fully deoxidize, then cool to 1000℃, fill with argon, and pour the master alloy to obtain consumable electrode rods. Wherein, the added amount of graphite blocks is 0.3 wt % of the total amount of raw materials ...

Embodiment 2

[0037] This embodiment provides a high temperature resistant connection layer primer, the components of which include 24wt% Ni, 24wt% Fe, 0.5wt% Mo, 0.1wt% Nb, 3wt% Cr, and the balance is copper.

[0038] The preparation method of the above-mentioned connecting layer primer comprises the following steps,

[0039]Before smelting, all raw materials were pickled to remove surface oxides, placed at 50°C for 30min, and dried. Add Ni-Mo master alloy, Ni-Nb master alloy, Cr block, Ni block, Fe block, and Cu block into the smelting furnace in order from bottom to top. After all the raw materials are melted, the temperature is raised to 1500 ℃, add graphite blocks, keep the temperature for 30min, and use electromagnetic stirrer to stir at the same time to achieve alloying and fully deoxidize, then cool to 1000℃, fill with argon, and pour the master alloy to obtain consumable electrode rods. Wherein, the added amount of graphite blocks is 0.3 wt % of the total amount of raw materials o...

Embodiment 3

[0042] This embodiment provides a high temperature resistant connection layer primer, the components of which include 20wt% Ni, 20wt% Fe, 1wt% Mo, 1wt% Nb, 1.5wt% Cr, and the balance is copper.

[0043] The preparation method of the above-mentioned connecting layer primer comprises the following steps,

[0044] Before smelting, all raw materials were pickled to remove surface oxides, placed at 50°C for 30min, and dried. Add Ni-Mo master alloy, Ni-Nb master alloy, Cr block, Ni block, Fe block, and Cu block into the smelting furnace in order from bottom to top. After all the raw materials are melted, the temperature is raised to 1500 ℃, add graphite blocks, keep the temperature for 30min, and use electromagnetic stirrer to stir at the same time to achieve alloying and fully deoxidize, then cool to 1000℃, fill with argon, and pour the master alloy to obtain consumable electrode rods. Wherein, the added amount of graphite blocks is 0.4 wt % of the total amount of raw materials fo...

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Abstract

The invention belongs to the technical field of connecting material preparation, and particularly relates to a high temperature-resistant connecting layer primer and a preparation method and application thereof. The composition of the connection layer primer includes 15-25% Ni, 15-25% Fe, 0.5-5% Mo, 0-2% Nb, 1-3% Cr, and the balance is Cu. The liquidus temperature of the connecting layer primer provided by the invention is above 1100°C, and the melting point is about 1300°C, which can effectively withstand the thermal load during the braking process of 450km / h. The connection layer primer provided by the invention has the same matrix structure as the copper-based friction block, has strong compatibility, and has good matching with the friction blocks in most brake pads. Nickel element can be infinitely soluble in copper matrix and has good diffusivity. The invention adopts a specific amount of nickel, which can greatly improve the bonding strength between the primer and the friction material. The specific iron-nickel ratio stabilizes the crystal structure of the primer and avoids the risk of failure due to ferrite to austenite transformation.

Description

technical field [0001] The invention belongs to the technical field of connecting material preparation, and particularly relates to a high temperature-resistant connecting layer primer and a preparation method and application thereof. Background technique [0002] With the development of national scientific and technological level, the running speed of high-speed trains has increased significantly, but with it, the braking load is also increasing, and the requirements of the key part of the braking system - the brake pads are also increasing. Come higher. With the increase of braking power, the brake pads will bear higher thermal load during the braking process. When the initial braking speed reaches 450km / h, the instantaneous flash point temperature of the brake pads is as high as 1000℃. Therefore, not only higher requirements are placed on the high temperature performance of the friction material in the brake pads, but also higher requirements are placed on the bonding st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/06C22C9/00C22C1/03B22F9/14B22F7/08B22F3/02B22F3/14B22F5/00F16D69/04
CPCC22C9/06C22C9/00C22C1/03B22F9/14B22F7/064B22F3/02B22F3/14B22F5/00F16D69/04
Inventor 陈晓玮龙波程景琳丁向莹魏东彬余程巍
Owner BEIJING TIANYISHANGJIA NEW MATERIAL
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