Automobile steering knuckle resisting transgranular fracture failure mode and manufacturing method of automobile steering knuckle

An automobile steering knuckle and failure mode technology, which is applied to the automobile steering knuckle and its manufacturing field, can solve the problems of poor torsion resistance, high processing cost, and lack of comprehensive improvement of the application performance of aluminum alloys, and achieves resistance to axial tensile extrusion. Strong ability, simple and fast casting, excellent comprehensive mechanical properties

Active Publication Date: 2019-07-26
QUZHOU HENGYE AUTO PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, in order to ensure the mechanical properties required for initial use, forged steel or cast iron is often used to manufacture the steering knuckle, which brings great difficulties to the later anti-corrosion treatment, especially when the steering knuckle is located near the wheel at the same height as the chassis , the negative environmental impacts of air, water and soil are great, so the steel steering knuckle in the conventional technology is prone to intergranular corrosion and the ability to resist torsion decreases, resulting in transgranular fracture and final failure
However, whether it is simple cast aluminum, forged aluminum or directly deformed aluminum alloy for cutting, either the processing cost is too high (aluminum alloy processing is more difficult than steel parts, and it is easy to stick to the knife), or the mechanical properties are insufficient. In the existing technology, only a small number of steering knuckles that do not require high working conditions or use high-streng

Method used

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  • Automobile steering knuckle resisting transgranular fracture failure mode and manufacturing method of automobile steering knuckle
  • Automobile steering knuckle resisting transgranular fracture failure mode and manufacturing method of automobile steering knuckle
  • Automobile steering knuckle resisting transgranular fracture failure mode and manufacturing method of automobile steering knuckle

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0025] Example 1:

[0026] An automobile steering knuckle capable of resisting the failure mode of cross-crystalline fracture. The porosity of the steering knuckle is 0%-0.2%. The grain growth direction is the horizontal direction from the outermost edge to the center of the axis. The material used is ZL203;

[0027] The manufacturing method of the above-mentioned automotive steering knuckle resistant to the failure mode of crystal penetration fracture includes the following steps:

[0028] 1) Preparation before manufacturing

[0029] ①Preparation of raw materials: prepare sufficient design and corresponding casting aluminum-copper alloy master ingot;

[0030] ② Tooling preparation: prepare a water-cooled copper mold rotary casting mold. The mold is composed of two half molds. The parting surface 6 is located at the center line of the two sides of the symmetry. The mold entity is solid copper matrix 1, which is made of pure copper. The position corresponding to the central shaft of the...

Example Embodiment

[0039] Example 2:

[0040] The whole is consistent with Example 1, the differences are:

[0041] The material used for the steering knuckle is ZL202;

[0042] The manufacturing method of the above-mentioned automotive steering knuckle resistant to the failure mode of crystal penetration fracture includes the following steps:

[0043] 1) Preparation before manufacturing

[0044] ② Tooling preparation: the solid copper substrate 1 is provided with a water-cooling pipe 3 at 1.2cm on the radial outside of the runner 2 near the runner; prepare a single section whose inner cavity size is 3% larger than the design contour size of the steering knuckle, and the inner surface is 10 layers 0.1mm stainless steel belt;

[0045] 2) Casting

[0046] ①After spraying the parting agent on the inner cavity of the water-cooled copper mold rotary casting mold, combine and assemble it and then install and fix it on the rotating chassis in the furnace corresponding to the automatic casting mechanism, and the g...

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Abstract

The invention discloses an automobile steering knuckle resisting a transgranular fracture failure mode and a manufacturing method of the automobile steering knuckle. The steering knuckle is formed bycarrying out continuous water-cooled copper mold rotary rapid cooling casting, and then carrying out hot isostatic pressing in the same furnace by adopting a stainless steel belt sheath for one-time forming, the steering knuckle can be cut into a plurality of blanks after being formed, the porosity of the obtained blanks ranges from 0% to 0.2%, and the overall growth direction of grains is the horizontal direction from the outmost edge to the central of the axis. The aluminum alloy steering knuckle has the advantages of radial growth of the grains, good compactness, high strength, torsion resistance and impact resistance.

Description

technical field [0001] The invention relates to the field of automotive structural parts, in particular to an automotive steering knuckle resistant to transgranular fracture failure mode and a manufacturing method thereof. Background technique [0002] In the prior art, in order to ensure the mechanical properties required for initial use, forged steel or cast iron is often used to manufacture the steering knuckle, which brings great difficulties to the later anti-corrosion treatment, especially when the steering knuckle is located near the wheel at the same height as the chassis , the negative environmental impacts such as air, water and soil are great, so the steel steering knuckle in the conventional technology is prone to intergranular corrosion and the ability to resist torsion decreases, resulting in transgranular fracture and final failure. However, whether it is simple cast aluminum, forged aluminum or directly deformed aluminum alloy for cutting, either the processi...

Claims

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Application Information

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IPC IPC(8): B22D27/08B22D27/04B62D7/18B21J5/00
CPCB21J5/002B22D27/04B22D27/08B62D7/18
Inventor 钱金松张烨玮
Owner QUZHOU HENGYE AUTO PARTS
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