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Preparation method of brake hose joint

A technology of brake pipe and head, which is applied in the field of preparation of brake pipe joints, can solve the problems of wear resistance, medium resistance, oxidation resistance, general corrosion resistance, non-competitive cost-effectiveness, and a large number of spare parts, etc., to achieve improved Strength and corrosion resistance, reducing overheating sensitivity and temper brittleness, and improving hardenability

Active Publication Date: 2017-01-04
NINGBO YINZHOU CHINAUST AUTOMOBILE FITTINGS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the brake pipe joints in the prior art are based on the research structure. For example, the Taiwan utility model patent title "Quick coupling device for disc brake gasoline hall" discloses a brake pipe joint. Its main components include a male joint, A female connector, and a snap-fit ​​device, however, the number of spare parts inside each main component is too large, not streamlined enough, and not competitive in terms of cost-effectiveness
In addition, when the existing brake is to be assembled with the car body (not shown in the figure), the male joint and the female joint on the brake must be separated first, but during this process, the female joint will produce oil leakage
Moreover, the existing brake pipe joints are mostly made of conventional alloy steel through conventional processing methods, and their wear resistance, medium resistance, oxidation resistance, and corrosion resistance are relatively general. , sealing, or service life need to be improved

Method used

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  • Preparation method of brake hose joint
  • Preparation method of brake hose joint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Raw materials for steelmaking: according to the composition and mass percentage of brake pipe joints: C: 0.19%, Si: 0.10%, Mn: 0.90%, B: 0.12%, Ti: 0.055%, Al: 0.25%, Mo: 0.72%, V: 0.20%, Nb: 0.08%, La: 0.015%, P ≤ 0.02%, S ≤ 0.02%, the balance is Fe, and melted into molten steel at 1320°C. After smelting, the molten steel is poured with full protection of argon seal. And rolled into steel plate; during rolling, the rolling temperature is 1000°C, the finish rolling temperature is 900°C, the spinning temperature is 860°C, and the coiling temperature is 750°C;

[0034] Cold extrusion molding: the steel is subjected to surface pickling and derusting, limestone coating, and phosphating treatment in sequence, and then cold extrusion molding to obtain a brake pipe joint blank;

[0035] Heat treatment: heat up the brake pipe joint blank at a rate of 8 °C / min to 530 °C, then at a rate of 6 °C / min to 820 °C, and then at a rate of 10 °C / min to 1020 °C with quenching oil Quenchin...

Embodiment 2

[0038] Raw material steelmaking: according to the composition and mass percentage of the brake pipe joint: C: 0.18%, Si: 0.08%, Mn: 1.00%, B: 0.01%, Ti: 0.06%, Al: 0.22%, Mo: 0.68%, V: 0.22%, Nb: 0.05%, La: 0.012%, P ≤ 0.02%, S ≤ 0.02%, the balance is Fe, and melted into molten steel at 1340°C. After smelting, the molten steel is poured with full protection of argon seal. And rolled into steel plate; during rolling, the rolling temperature is 990°C, the finish rolling temperature is 890°C, the spinning temperature is 870°C, and the coiling temperature is 755°C;

[0039] Cold extrusion molding: the steel is subjected to surface pickling and derusting, limestone coating, and phosphating treatment in sequence, and then cold extrusion molding to obtain a brake pipe joint blank;

[0040] Heat treatment: heat up the brake pipe joint blank at a rate of 9 °C / min to 535 °C, then at a rate of 6 °C / min to 800 °C, and then at a rate of 12 °C / min to 1040 °C with quenching oil Quenching tr...

Embodiment 3

[0043] Raw materials for steelmaking: according to the composition and mass percentage of brake pipe joints: C: 0.18%, Si: 0.11%, Mn: 0.88%, B: 0.08%, Ti: 0.05-0.06%, Al: 0.28%, Mo: 0.75 %, V: 0.18%, Nb: 0.008-0.14%, La: 0.018%, P≤0.02%, S≤0.02%, the balance is Fe, and melted into molten steel at 1310 ° C, the molten steel is smelted and sealed with argon Full protection pouring, and rolling into steel plate; rolling temperature is 1010°C, finish rolling temperature is 905°C, spinning temperature is 855°C, coil collection temperature is 745°C;

[0044] Cold extrusion molding: the steel is subjected to surface pickling and derusting, limestone coating, and phosphating treatment in sequence, and then cold extrusion molding to obtain a brake pipe joint blank;

[0045] Heat treatment: heat up the brake pipe joint blank to 525°C at a rate of 8°C / min, then to 850°C at a rate of 7°C / min, and then to 990°C at a rate of 9°C / min with quenching oil Quenching treatment, heat preservation...

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Abstract

The invention relates to a preparation method of a brake hose joint, belonging to the technical field of alloy material processing. The preparation method comprises the following steps: proportioning, smelting, smelting, casting and rolling to obtain a steel plate; sequentially carrying out surface acid washing derusting, limestone coating and phosphating on the steel, and carrying out cold extrusion forming to obtain a brake hose joint blank; heating the brake hose joint blank to 520-540 DEG C, heating to 780-860 DEG C, heating to 980-1050 DEG C, carrying out quenching treatment with quenching oil, keeping the temperature for 1-3 hours, tempering at 350-420 DEG C, and keeping the temperature for 1-2 hours, thereby obtaining a brake hose joint semifinished product; and carrying out pulse electroplating on the brake hose joint semifinished product to obtain the brake hose joint of which the surface is plated with a chromium coating. The brake hose joint is prepared from cold forging steel; and the cold forging steel is subjected to quenching+high temperature tempering dual heat treatment and then subjected to pulse electroplating to enhance the hardness, strength, corrosion resistance, temperature resistance and other properties of the brake hose joint.

Description

technical field [0001] The invention relates to a method for preparing a brake pipe joint, which belongs to the technical field of alloy material processing. Background technique [0002] With the continuous and rapid development of the national economy and the continuous improvement of people's living standards, my country's automobile consumption market has undergone tremendous changes since 2002. The private car consumption market is even more "blowout" growth. In the face of increasingly fierce market competition, auto parts suppliers are also keeping pace with the times to continuously develop safer and more efficient auto parts. [0003] The car structure is mainly composed of the engine, chassis, electrical appliances, and body; among them, the engine is the power device of the car, which is composed of 2 major mechanisms and 5 major systems: crank connecting rod mechanism, gas distribution mechanism, cooling system, fuel supply system, and lubrication system. , ign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/14C22C38/06C22C38/12C21D8/10C21D1/18C21D9/08C25D5/18C25D3/08F16L21/00
CPCC21D1/18C21D8/105C21D9/085C22C38/005C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C25D3/08C25D5/18F16L21/00
Inventor 董阿能
Owner NINGBO YINZHOU CHINAUST AUTOMOBILE FITTINGS CORP
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