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High-speed bullet train brake disc body and casting method and heat treatment method thereof

A heat treatment method and technology for high-speed trains, applied in brake discs, heat treatment furnaces, heat treatment equipment, etc., can solve the problems of increased yield point and tensile strength, decreased plasticity and impact toughness, and cannot be infinitely solid solution, reaching low Modulus of elasticity and coefficient of thermal expansion, the effect of preventing the generation and propagation of cracks, and improving the microstructure

Inactive Publication Date: 2017-11-17
JIANGSU JINSHI CASTING & FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1) Carbon (C): expands the γ-phase region, but due to the formation of cementite, it cannot be infinitely dissolved; the maximum solubility in α-Fe and γ-Fe is 0.02% and 2.1% respectively; the carbon content in steel increases, the yield point and tensile strength increase, but the plasticity and impact toughness decrease

Method used

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  • High-speed bullet train brake disc body and casting method and heat treatment method thereof
  • High-speed bullet train brake disc body and casting method and heat treatment method thereof
  • High-speed bullet train brake disc body and casting method and heat treatment method thereof

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Effect test

Embodiment 1

[0041] Embodiment 1: cast and heat treat the brake disc body of high-speed train according to the following steps

[0042] (1) Structural design of the brake disc body: the brake disc body is cast, and the upper and lower disc surfaces of the disc body are parallel to each other. Linked by "U" blocks; the total outer diameter of the brake disc body is 650mm, leaving a friction surface of 140mm from the outer circle edge, and the rest are processed into holes; the thickness of the upper and lower disc surfaces of the brake disc body Equal, 20mm; the distance between the upper disc surface and the lower disc surface of the brake disc body is 60mm; the length of the "U" block is 200mm, the width is 60mm, and the thickness is 60mm, and the arc of the "U" block is the same radius as the disc body The arc size is the same;

[0043] (2) Material design of the brake disc body: the controlled chemical composition range during furnace melting is as follows: C 0.20, Si 0.40, Mn0.80, P≤0...

Embodiment 2

[0047] Embodiment 2: cast and heat treat the brake disc body of high-speed train according to the following steps

[0048] (1) Structural design of the brake disc body: the brake disc body is cast, and the upper and lower disc surfaces of the disc body are parallel to each other. Linked by "U" blocks; the total outer diameter of the brake disc body is 675mm, the friction surface is 150mm away from the outer circle edge, and the rest are processed into holes; the thickness of the upper and lower disc surfaces of the brake disc body Equal, 22.5mm; the distance between the upper disc surface and the lower disc surface of the brake disc body is 62.5mm; the length of the "U" block is 210mm, the width is 70mm, and the thickness is 62.5mm. The arc of the "U" block and the disc The size of the arc with the same radius is the same;

[0049] (2) Material design of the brake disc body: the controlled chemical composition range during furnace melting is as follows: C 0.25, Si 0.55, Mn1.0...

Embodiment 3

[0053] Embodiment 3: cast and heat treat the brake disc body of high-speed train according to the following steps

[0054] (1) Structural design of the brake disc body: the brake disc body is cast, and the upper and lower disc surfaces of the disc body are parallel to each other. Linked by "U" blocks; the total outer diameter of the brake disc body is 700mm, and the friction surface is 160mm away from the outer circle edge, and the rest are processed into holes; the thickness of the upper and lower disc surfaces of the brake disc body is Equal, 25mm; the distance between the upper disc surface and the lower disc surface of the brake disc body is 65mm; the length of the "U" block is 220mm, the width is 80mm, and the thickness is 65mm. The arc of the "U" block is the same radius as the disc body The arc size is the same;

[0055] (2) Material design of the brake disc body: the controlled chemical composition range during furnace melting is as follows: C 0.30, Si 0.7, Mn1.30, P≤...

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Abstract

The invention discloses a high-speed bullet train brake disc body and a casting method and heat treatment method thereof. The brake disc body is obtained through casting and heat treatment, an upper disc surface and a lower disc surface of the disc body are parallel to each other, and the upper disc surface and the lower disc surface of the disc body are connected through a plurality of U-shaped blocks which are uniformly distributed. According to the physical design of the disc body, a good balance degree of the disc body during high-speed rotation is guaranteed, and the amplitude during high-speed braking of the brake disc is greatly reduced; according to the design of the casting technique of the disc body, the quality of the disc body is greatly improved, and a high safety coefficient and a long service life of the disc body in long-time continuous braking are guaranteed; and according to the design of the heat treatment technology, the strength and the impact to be borne by the disc body during high-speed braking under the extremely-cold environment are reduced, and the thermal warping deformation generated in the continuous braking process is also reduced.

Description

technical field [0001] The invention relates to a brake disc for a railway locomotive, in particular to a high-speed train brake disc body and its casting method and heat treatment method. Background technique [0002] The brake disc is the brake disc, which is a metal disc made of alloy steel and fixed on the wheel to rotate with the wheel. When the brakes are applied while the vehicle is running, the brake calipers clamp the brake disc to slow down or stop the vehicle. Brake disc is one of the parts with the highest technical content in the EMU braking system, and it is also the focus of localization and independent innovation. Its quality directly affects the safety and comfort of EMUs, as well as the lightweight and maintenance of components. [0003] At present, the brake disc technology of low- and medium-speed locomotives in my country is relatively mature, but due to the high speed and harsh operating conditions of high-speed trains, the technical requirements for t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/44B22C9/22B22C9/02B22C9/08C21D9/00C21D1/18C21D1/28F16D69/02F16D65/12
CPCC22C38/04B22C9/02B22C9/082B22C9/086B22C9/088B22C9/22C21D1/18C21D1/28C21D9/0068C22C38/02C22C38/44F16D65/125F16D65/128F16D69/027F16D2200/0021F16D2200/0082F16D2250/0007F16D2250/0053
Inventor 吉哲范献兵李长海孙允龙
Owner JIANGSU JINSHI CASTING & FORGING
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