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Steel belt for leaf spring of automobile safety belt and its production process

A technology of safety belt and spring sheet, which is applied in the direction of rolling mill control device, metal rolling, manufacturing tools, etc., can solve the problems of high cost, difficult promotion, and not particularly prominent indicators, and achieve the effect of good thickness

Inactive Publication Date: 2006-05-17
SHANGHAI LONGXING SPECIAL STEEL
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The above steel belt products for automobile insurance belt springs need to be processed with special raw materials, the cost is high, and the obtained indicators are not particularly outstanding, so there are certain limitations in actual production and it is not easy to popularize.

Method used

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  • Steel belt for leaf spring of automobile safety belt and its production process

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Embodiment Construction

[0043] As the raw material, the SUS301 steel strip jointly developed by us and Japan Kawasaki Steel Industry Co., Ltd. has a thickness of 1.0mm and a chemical composition of C: ≤0.15%, Mn: ≤2.00%, Si: ≤1.00%, P: ≤0.045%, S: ≤0.030%, Ni: 6.00-8.00%, Cr: 16.00-17.00%; the rest is iron and unavoidable impurities.

[0044] After raw material steel strip rolling, steel strip intermediate rolling, steel strip trimming, intermediate rolling process, finished product shape control and quenching and tempering rolling, we can get the 0.24mm thick steel strip with precise thickness and good shape that we need. Its width is about 128mm, and the effective width reaches 98%. The specific conditions are as follows:

[0045] Raw material steel strip calendering:

[0046] Calendering final thickness: 0.58mm±0.030mm

[0047] Calendering times: 5

[0048] Calendering oil temperature: 20~42℃

[0049] Calendering current: within 40A

[0050] Intermediate rolling of steel strip:

[0051] Cal...

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Abstract

The steel belt for leaf spring of automobile safety belt consists of C not more than 0.15 wt%, Mn not more than 2.00 wt%, Si not more than 1.00 wt%, P not more than 0.045 wt%, S not more than 0.030 wt%, Ni 6.00-8.00 and Cr 16.00-17.00 wt% except Fe and inevitable impurity. It is 0.24 mm thick, and has thickness tolerance within 0.002 mm. The production process of the steel belt includes the steps of: rolling the raw steel belt, rolling the intermediate steel belt, cutting edge, intermediate rolling, controlling the product plate shape and seasoning rolling. Ultimately, the cold rolled steel belt has austenite matrix with small amount of distributed martensite, hardness of HV 550 and tensile strength up to 1800 N / sq mm.

Description

technical field [0001] The invention relates to a steel strip used for manufacturing automobile safety belt spring sheets and a production method thereof. Background technique [0002] In the past, special alloys were mostly used in the processing of steel strips for automobile insurance belt springs to achieve the required physical properties of the materials. For example, JP3032395B2 discloses a high-strength stainless steel strip used for the retracting spring of the automobile safety belt. The composition and percentage weight thereof are C: 0.03-0.20%, Si: 3.0-5.0%, Mn: 2.0-5.0%, Cr: 11-17%, Ni: 5-8%, N: 0.03-0.20%, and the rest is iron; it has a relatively stable austenite metallographic structure; the properties of the material after cold rolling are: hardness Hv 560, tensile strength 1656.2 N / mm 2 . [0003] Czechoslovakian patent CS250904 discloses a steel strip for automobile safety belt spring and its production method. The composition and percentage weight of ...

Claims

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Application Information

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IPC IPC(8): C22C38/40B21B37/16C21D8/02
Inventor 贺原洪玮刘睿华
Owner SHANGHAI LONGXING SPECIAL STEEL