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High-strength steel for seat slide rails and method for producing the same based on thin strip casting-rolling

A thin strip casting and rolling, high-strength technology, applied in the field of steel production, can solve the problems of difficult to achieve performance and dimensional accuracy, long production process of cold-rolled high-strength steel, lower production costs, etc. Good uniformity and good isotropic effect

Inactive Publication Date: 2020-06-02
SHAGANG GROUP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above problems, the present invention provides a method for manufacturing high-strength seat slide rail steel based on thin-strip casting and rolling to solve the difficulty in achieving product performance and dimensional accuracy in conventional hot rolling production lines. The cold-rolled high-strength steel produced by washing + cold rolling + annealing process has problems such as long production process, many processes, high energy consumption, and large environmental load, which reduces production costs. At the same time, the material properties are more suitable for manufacturing seat slide rails

Method used

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  • High-strength steel for seat slide rails and method for producing the same based on thin strip casting-rolling
  • High-strength steel for seat slide rails and method for producing the same based on thin strip casting-rolling
  • High-strength steel for seat slide rails and method for producing the same based on thin strip casting-rolling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] (1) Smelting: In step (1), use electric furnace steelmaking, VD vacuum decarburization and deoxidation, and LF refining to obtain molten steel with qualified components.

[0056] Among them, the composition of molten steel by weight percentage is: C: 0.030, Mn: 1.45, Si: 0.37, Cr: 0.28, Nb: 0.068, V: 0.032, P: 0.012, S: 0.002, Al: 0.002, and the balance is Fe and impurity elements.

[0057] (2) Thin strip continuous casting: The molten steel with qualified composition is cast and rolled by thin strip casting and rolling equipment. Under the protection of inert gas, the exemplary casting and rolling speed is 67m / min to obtain a cast strip with a thickness of 1.85mm.

[0058] (3) Hot rolling: the cast strip is rolled into a thin strip of 1.47mm through one pass of hot rolling with a reduction of 21%, and the temperature at the exit of the rolling mill is 825°C.

[0059] (4) Cooling and coiling: The hot-rolled strip is cooled by an air-mist cooling system, and then coiled...

Embodiment 2

[0070] (1) Smelting: In the step (1), adopt electric furnace steelmaking, VD vacuum decarburization and deoxidation, and LF refining to obtain molten steel with qualified components. Percentage by weight: C: 0.026, Mn: 1.37, Si: 0.42, Cr: 0.22, Nb: 0.074, V: 0.038, P: 0.015, S: 0.003, Al: 0.003, and the balance is Fe and impurity elements.

[0071] (2) Thin strip continuous casting: The molten steel with qualified composition is cast and rolled by thin strip casting and rolling equipment. Under the protection of inert gas, the casting and rolling speed is 62m / min to obtain a cast strip with a thickness of 1.96mm.

[0072] (3) Hot rolling: the cast strip is rolled into a thin strip of 1.58mm through one pass of hot rolling with a reduction of 19%, and the temperature at the exit of the rolling mill is 808°C.

[0073] (4) Cooling and coiling: the hot-rolled strip is cooled by an air-mist cooling system, and then coiled at 410°C and air-cooled to room temperature to obtain a hot-...

Embodiment 3

[0084] (1) Smelting: In the step (1), converter steelmaking, VD vacuum decarburization and deoxidation, and LF refining are used to obtain molten steel with qualified components. Percentage by weight: C: 0.037, Mn: 1.58, Si: 0.35, Cr: 0.20, Nb: 0.056, V: 0.045, P: 0.011, S: 0.003, Al: 0.002, and the balance is Fe and impurity elements.

[0085] (2) Thin strip continuous casting: The molten steel with qualified composition is cast and rolled by thin strip casting and rolling equipment. Under the protection of inert gas, the casting and rolling speed is 59m / min to obtain a cast strip with a thickness of 2.02mm.

[0086] (3) Hot rolling: the cast strip is rolled into a thin strip of 1.72mm through one pass of hot rolling with a reduction of 15%, and the temperature at the exit of the rolling mill is 848°C.

[0087] (4) Cooling and coiling: the hot-rolled strip is cooled by an air-mist cooling system, and then coiled at 396°C and air-cooled to room temperature to obtain a hot-roll...

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Abstract

The invention belongs to the technical field of steel production, and particularly relates to high-strength steel for seat slide rails and a method for producing the same based on thin strip casting-rolling. Molten steel is subjected to thin strip continuous casting to obtain a cast strip, the cast strip is subjected to single-pass hot rolling and aerosol cooling and coiled to obtain a hot-rolledcoil, then the hot-rolled coil is opened on a continuous annealing-pickling line, and after an annealing stage and a pickling stage, cleaning, oiling and coiling are performed to obtain a high-strength pickled coil. According to the method, a thin strip casting-rolling and continuous annealing-pickling technology is adopted to produce the high-strength steel for the seat slide rails, the problem that a thin, high-strength and high-dimensional-accuracy product cannot be easily produced through a traditional hot rolling technology is solved, and the problem that a hot rolling, pickling, cold rolling and annealing technology has a long process, high energy consumption and poor product isotropy is also solved. In the product, low-temperature coiling is adopted to obtain a high-yield-ratio rodlike bainite phase, Nb, V and the like are sufficiently separated out by the subsequent annealing technology, phase transformation stress is released, the plasticity is further improved while high strength and the high yield ratio are achieved, and the steel is more suitable for manufacturing the seat slide rails.

Description

technical field [0001] The invention belongs to the technical field of iron and steel production, and in particular relates to a high-strength seat slide rail steel and a production method thereof based on thin strip casting and rolling. Background technique [0002] In recent years, in the automotive field, high-strength thin steel plates have been used in body frame structural parts and safety parts to promote lightweight, energy saving and consumption reduction, and have produced significant economic and social benefits. As the part connecting the occupant and the body, the quality and safety of the car seat are important indicators to measure the performance of the car. The front and rear adjustment of the seat depends on the slide rail assembly installed under the seat. The quality of the seat slide rail is directly related to the safety of the driver. It has very strict safety indicators, difficult processing and high technical requirements. One of the components with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21D1/26C21D6/00C21D8/02C21D9/52C22C38/02C22C38/04C22C38/06C22C38/24C22C38/26C22C38/38C23G3/02
CPCC22C33/04C21D1/26C21D8/0226C22C38/04C22C38/02C22C38/38C22C38/26C22C38/24C22C38/06C21D2211/002C21D8/0205C21D8/0215C21D8/0247B22D11/001B22D11/0622B21B1/463B21B37/58B21B15/00B21B2015/0057Y02P10/20
Inventor 冯庆晓李化龙施一新刘志桥宋乙峰刘玉君刘新院吴铁强
Owner SHAGANG GROUP
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