Yoke product and preparation method thereof

A product and technology of yoke, applied in mechanical equipment, coating, hot-dip plating process, etc., can solve problems such as poor adhesion, zinc layer peeling, etc., achieve good wettability, high coating performance, and reduce energy consumption Effect

Active Publication Date: 2015-06-10
SHANDONG JINMA INDAL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conventional non-quenched and tempered free-cutting steel in the prior art is obtained by adding trace alloy elements to medium carbon steel. Due to the high carbon content, the adhesion is poor during hot-dip galvanizing, and it is easy to cause Zinc peeling off

Method used

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  • Yoke product and preparation method thereof
  • Yoke product and preparation method thereof
  • Yoke product and preparation method thereof

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Embodiment Construction

[0021] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified below by referring to the exemplary embodiments.

[0022] In the present invention, the yoke product is prepared by a method comprising the following steps: roll forging billet → forging forming → magnetic particle inspection → mechanical processing → hot-dip galvanizing; and the steps do not include quenching and tempering treatment.

[0023] Among them, the material used in the yoke product is non-quenched and tempered free-cutting steel, and its element composition and weight percentage are: C: 0.32~0.39wt%, Si: 0.30~0.50wt%, Mn: 1.00~1.50wt%, S: 0.035~0.050 wt%, Ca: 0.002~0.005 wt%, Mg: 0.002~0.005 wt%, V: 0.06~0.13 wt%, Mo: 0.015~0.025wt%, P≤0.035wt%, Cr≤0.30wt% %, Ni≤0.30wt%, Cu≤0.25wt%, Al≤0.01wt%, Nb≤0.01wt%, Ti≤0.01wt%, the balance is Fe and unavoidable impurities. The non-quenched and tempered free-cutting steel is smelted in an electric fu...

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Abstract

The invention relates to a yoke product and a preparation method thereof. The preparation method comprises the following steps: performing roll forging blanking; performing forging formation; performing magnetic powder inspection; performing mechanical processing. The steps do not comprise thermal refining; in the step of forging formation, semifinished products obtained after roll forging blanking are heated to 1180-1230 DEG C, the preforging temperature is 1180-1230 DEG C, the final forging temperature is 930-980 DEG C, the cooling speed after final forging is controlled to be 2.5-3.5 DEG C/s, and after the temperature drops to 420-450 DEG C, slow cooling is performed. According to the yoke product disclosed by the invention, after treated by forging and mechanical processing, the properties of parts finally satisfy using requirements, the manufacturing cost is reduced, the consumption of energy sources is obviously reduced, and the production efficiency is improved. The prepared yoke product has the characteristics that the tensile strength can be 780-900 MPa, the yield strength can be 480-550 MPa, and the elongation percentage can be up to 16-40%.

Description

technical field [0001] The invention relates to the technical field of forging and processing of auto parts, more specifically, the invention relates to a yoke product and a preparation method thereof. Background technique [0002] The fork is one of the key parts of the car, and it uses devices such as balls to achieve shaft power output in different directions. The combination of the fork and the drive shaft is called a universal joint transmission. On vehicles with front-engine rear-wheel drive, the universal joint transmission device is installed between the output shaft of the transmission and the input shaft of the drive axle final drive; while the vehicle with front-engine front-wheel drive omits the drive shaft, the universal joint is installed Between the axle shaft of the front axle, which is responsible for both driving and steering, and the wheels. [0003] In the prior art, the processing technology of the yoke is mostly forged with medium carbon steel and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D3/16B23P15/14C22C38/60C22C38/46C22C38/48C22C38/50C22C38/24C22C38/26C22C38/28C22C38/16C22C38/14C22C38/12C21D8/00C23C2/06
Inventor 郭建春马祖文马祖斌马祖坤高朋李玉田郑世念
Owner SHANDONG JINMA INDAL GROUP
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