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Ultrahigh-strength corrosion-resistant hot-rolled plate for automobile transmission shaft pipe and production method thereof

A technology for drive shafts and hot-rolled sheets, applied in metal rolling, metal rolling, heat treatment furnaces, etc., can solve the problems of complex preparation process, low impact resistance, weak corrosion resistance, etc., to improve formability and Impact resistance, improved weldability and improved castability

Inactive Publication Date: 2021-06-15
HEBEI IRON AND STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low strength, poor corrosion resistance, high cost, complicated preparation process, poor welding quality, low impact resistance and long production cycle in the prior art, the hot-rolled sheet for automobile transmission shaft tube, etc., the present invention Provided are a hot-rolled sheet for ultra-high-strength corrosion-resistant automobile transmission shaft tubes and a production method thereof

Method used

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  • Ultrahigh-strength corrosion-resistant hot-rolled plate for automobile transmission shaft pipe and production method thereof
  • Ultrahigh-strength corrosion-resistant hot-rolled plate for automobile transmission shaft pipe and production method thereof
  • Ultrahigh-strength corrosion-resistant hot-rolled plate for automobile transmission shaft pipe and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In this example, the hot-rolled sheet for ultra-high-strength corrosion-resistant automobile transmission shaft pipe has a thickness of 10mm and a width of 1250mm, and its chemical composition and mass percentage are: C: 0.04%, Si: 0.10%, Mn: 1.50%, P: 0.014% , S: 0.005%, Cr: 0.30%, Nb: 0.064%, Ti: 0.025%, V: 0.035%, Alt: 0.040%, and the balance is Fe and unavoidable impurity elements.

[0020] The method for producing a hot-rolled plate for an ultra-high-strength corrosion-resistant automobile transmission shaft tube in this embodiment includes the following steps:

[0021] 1) Smelting and refining, using converters and refining furnaces to smelt and refine raw materials to obtain qualified molten steel;

[0022] 2) Continuous casting hot delivery, pouring the molten steel obtained in step 1) into a qualified continuous casting slab, and sending it to the heating furnace with hot delivery temperature of 760°C;

[0023] 3) Controlled rolling, using 5 passes of reversib...

Embodiment 2

[0028] In this embodiment, the hot-rolled plate for ultra-high-strength corrosion-resistant automobile transmission shaft pipe has a thickness of 8 mm and a width of 1340 mm. The chemical composition and mass percentage of the steel plate are: C: 0.05%, Si: 0.05%, Mn: 1.56%, P : 0.012%, S: 0.003%, Cr: 0.26%, Nb: 0.060%, Ti: 0.020%, V: 0.030%, Alt: 0.020%, and the balance is Fe and unavoidable impurity elements.

[0029] The method for producing a hot-rolled plate for an ultra-high-strength corrosion-resistant automobile transmission shaft tube in this embodiment includes the following steps:

[0030] 1) Smelting and refining, using converters and refining furnaces to smelt and refine raw materials to obtain qualified molten steel;

[0031] 2) Continuous casting hot delivery, the molten steel obtained in step 1) is poured into a qualified continuous casting slab, and hot sent to the heating furnace, and the hot delivery temperature is 800°C;

[0032] 3) Controlled rolling, usi...

Embodiment 3

[0037] In this example, the ultra-high-strength corrosion-resistant automobile transmission shaft tube has a thickness of 5 mm and a width of 1420 mm. Its chemical composition and mass percentage are: C: 0.07%, Si: 0.08%, Mn: 1.53%, P: 0.013 %, S: 0.002%, Cr: 0.23%, Nb: 0.055%, Ti: 0.015%, V: 0.025%, Alt: 0.034%, and the balance is Fe and unavoidable impurity elements.

[0038] The method for producing a hot-rolled plate for an ultra-high-strength corrosion-resistant automobile transmission shaft tube in this embodiment includes the following steps:

[0039] 1) Smelting and refining, using converters and refining furnaces to smelt and refine raw materials to obtain qualified molten steel;

[0040] 2) Continuous casting hot delivery, the molten steel obtained in step 1) is poured into a qualified continuous casting slab, and hot sent to the heating furnace, and the hot delivery temperature is 850°C;

[0041]3) Controlled rolling, using 5 passes of reversible rough rolling and ...

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Abstract

The invention discloses an ultrahigh-strength corrosion-resistant hot-rolled plate for an automobile transmission shaft pipe and a production method thereof. The hot-rolled plate is prepared from chemical components in percentage by mass as follows: 0.04%-0.07% of C, smaller than or equal to 0.10% of Si, 1.50%-1.60% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.005% of S, 0.20%-0.30% of Cr, 0.050%-0.065% of Nb, 0.015%-0.025% of Ti, 0.025%-0.035% of V, 0.020%-0.040% of Alt and the balance of Fe and inevitable impurity elements. The production method comprises the steps of smelting and refining, continuous casting and hot delivery, controlled rolling and controlled cooling. The tensile strength of the hot-rolled plate is larger than or equal to 900 MPa, the yield strength is larger than or equal to 800 MPa, the ductility is larger than or equal to 16%, and meanwhile the hot-rolled plate has good low-temperature impact resistance and corrosion resistance.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a hot-rolled plate for an ultra-high-strength corrosion-resistant automobile transmission shaft tube and a production method thereof. Background technique [0002] With the development of science and technology, the requirements for comprehensive properties such as strength, plasticity, toughness and service performance of steel materials are getting higher and higher. High strength can realize lightweight, high plasticity and toughness can improve energy absorption capacity, and effectively resist impact damage. Service performance may improve environmental adaptability, so high performance is always the theme of steel material development. Transmission shaft tube is an important part of power transmission in automobile transmission system. Improving the quality of steel used for transmission shaft tube is of great significance for improving the competitiveness of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/28C22C38/38C21D6/00C21D8/02C21D9/00C22C33/04B21B1/46B21B37/00B21B37/74
CPCB21B1/463B21B37/00B21B37/74B21B2201/06C21D6/002C21D6/005C21D6/008C21D8/0226C21D9/0081C21D2211/002C21D2211/005C22C33/04C22C38/002C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/28C22C38/38
Inventor 田鹏梁静召陈炳蓉白宗奇陆凤慧陈国涛张振全胡德勇
Owner HEBEI IRON AND STEEL