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Steel for ball cage of automobile drive system and production method thereof

An automobile drive system, ball cage technology, applied in furnaces, heat treatment equipment, manufacturing converters, etc., can solve the problems of inability to meet automobile upgrades, low material hardenability, and low static torsional strength.

Active Publication Date: 2020-10-27
JIANGSU LIHUAI IRON AND STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the domestic production of steel for automobile ball cages mainly uses ordinary 55 steel, which still only meets the requirements of the national standard. The hardenability of the material is low. Low, can no longer meet the requirements of car upgrades

Method used

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  • Steel for ball cage of automobile drive system and production method thereof
  • Steel for ball cage of automobile drive system and production method thereof
  • Steel for ball cage of automobile drive system and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Its chemical composition is as follows:

[0066] C: 0.54%, Si: 0.28%, Mn: 0.90%, Cr: 0.22%, S: 0.005%, P: 0.012%, [O]: 0.0010%, [H]: 0.00013%, and the rest is Fe. After continuous rolling (compression ratio ≥ 10), the steel billet is warm extruded into a ball cage, annealed at 650±10°C, quenched (quenching temperature 850±10°C, oil or polymer quenching) + tempering (temperature 170±10°C) , and its related properties are as image 3 shown.

Embodiment 2

[0068] Its chemical composition is as follows:

[0069] C: 0.53%, Si: 0.30%, Mn: 0.89%, Cr: 0.23%, S: 0.004%, P: 0.012%, [O]: 0.0012%, [H]: 0.00012%, and the rest is Fe. After continuous rolling (compression ratio ≥ 10), the steel billet is warm extruded into a ball cage, annealed at 650±10°C, quenched (quenching temperature 850±10°C, oil or polymer quenching) + tempering (temperature 170±10°C) , and its related properties are as Figure 4 shown.

[0070] Depend on image 3 and Figure 4 It can be seen that the depth of the hardened layer in Example 1 and Example 2 is much higher than that of 55 steel in the prior art, and the corresponding hardness and static torsional strength are also much higher than that of 55 steel in the prior art.

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Abstract

The invention discloses steel for joints in an automobile drive system and a production method for the same. The steel comprises the ingredients, by weight, including 0.53%-0.57% of C, 0.22%-0.32% ofSi, 0.80%-0.95% of Mn, 0.20%-0.30% of Cr, no more than 0.010% of S, no more than 0.015% of P, no more than 0.0015% of [O], no more than 0.00015% of [H] and Fe. According to the ingredients, the steelfor the joints in the automobile drive system and the production method for the same disclosed by the invention are characterized in that material hardenability is obviously enhanced through adjustment and increase of the content of Mn and addition of Cr, so thermal processing technological performance of the material is improved; and the material hardenability is obviously enhanced in comparisonwith steel materials used conventionally under a same thermal processing technology (with a normalizing temperature of 870 DEG C and an end quenching temperature of 845 DEG C).

Description

technical field [0001] The invention relates to the technical field of steel for a ball cage of an automobile drive system, in particular to an automobile drive system [0002] Steel for ball cage and production method thereof. Background technique [0003] The automobile manufacturing industry is one of the pillar industries of the national economy, and its technical level determines the level of the national manufacturing industry. In recent years, in order to realize the basic national policy of "green development", automobile products have been continuously upgraded. New energy vehicles will gradually replace existing fossil energy vehicles, and new energy vehicles have put forward higher requirements for lightweight vehicles. The quality of steel raw materials has also put forward higher and higher requirements. Developed countries in Europe and the United States have raised the production level of steel for automotive ball cages to a very high level through optimized...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/04B22D11/11C21C1/02C21C5/35C21C7/064C21C7/10C21D1/18C21D6/00C21D8/00C21D9/00C22C38/02C22C38/04C22C38/18
Inventor 石可伟左辉郑力宁肖波印传磊雷鸣
Owner JIANGSU LIHUAI IRON AND STEEL CO LTD
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