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Steel for car and treatment process of steel

A steel and automobile technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve the problems of poor high temperature resistance and oxidation resistance, poor corrosion resistance, low strength, etc., to improve wear resistance, improve The effect of resisting atmospheric corrosion and increasing service life

Inactive Publication Date: 2017-05-31
SUZHOU NIUDONG PRECISION MFG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the automobile industry, the standardization of auto parts has also promoted the rapid development of the automobile industry. The demand for steel required for automobile production is increasing day by day. Poor performance, poor high temperature resistance and oxidation resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A steel for automobiles provided in this embodiment, the composition and mass percentage of the steel plate are: carbon: 0.03%, silicon: 0.13%, molybdenum: 0.64%, bromine: 0.21%, boron: 0.21%, vanadium: 0.74%, Zirconium: 0.82%, niobium: 0.52%, copper: 2.23%, sodium: 0.37%, chromium: 8.72%, thallium: 0.02%, nickel: 3.20%, the balance is Fe and unavoidable impurities;

[0037] The heat treatment process of the light-duty high-strength steel plate used for shelves, the specific process is as follows:

[0038]Step (1): Heat the forged steel plate through a high-frequency quenching furnace to 1370°C, keep it warm for 45 minutes, then air-cool to 750°C, use water cooling and oil cooling, and first use water cooling to cool the steel plate at a cooling rate of 20°C / s To 420°C, use oil cooling to cool the steel plate to 280°C at a cooling rate of 13°C / s, then heat to 920°C, keep it for 42 minutes, and then air cool to room temperature;

[0039] Step (2): After completing step ...

Embodiment 2

[0047] A steel for automobiles provided in this embodiment, the composition and mass percentage of the steel plate are: carbon: 0.05%, silicon: 0.15%, molybdenum: 0.66%, bromine: 0.23%, boron: 0.23%, vanadium: 0.76%, Zirconium: 0.84%, niobium: 0.55%, copper: 2.27%, sodium: 0.39%, chromium: 8.75%, thallium: 0.04%, nickel: 3.22%, the balance is Fe and unavoidable impurities;

[0048] The heat treatment process of the light-duty high-strength steel plate used for shelves, the specific process is as follows:

[0049] Step (1): Heat the forged steel plate through a high-frequency quenching furnace to 1375°C, hold it for 55 minutes, and then air-cool it to 755°C. Combine water cooling and oil cooling, and first use water cooling to cool the steel plate at a cooling rate of 22°C / s To 430°C, use oil cooling to cool the steel plate to 290°C at a cooling rate of 15°C / s, then heat to 930°C, keep it for 45 minutes, and then air cool to room temperature;

[0050] Step (2): Complete step 1...

Embodiment 3

[0058] The composition and mass percentage of the steel sheet provided in this embodiment are: carbon: 0.04%, silicon: 0.14%, molybdenum: 0.65%, bromine: 0.22%, boron: 0.22%, vanadium: 0.75%, Zirconium: 0.83%, niobium: 0.54%, copper: 2.25%, sodium: 0.38%, chromium: 8.74%, thallium: 0.03%, nickel: 3.21%, the balance is Fe and unavoidable impurities;

[0059] The heat treatment process of the light-duty high-strength steel plate used for shelves, the specific process is as follows:

[0060] Step (1): Heat the forged steel plate through a high-frequency quenching furnace to 1372°C, keep it warm for 48 minutes, then air-cool to 752°C, use water cooling and oil cooling, and first use water cooling to cool the steel plate at a cooling rate of 21°C / s To 428°C, use oil cooling to cool the steel plate to 285°C at a cooling rate of 14°C / s, then heat to 926°C, keep warm for 43min, and then air cool to room temperature;

[0061] Step (2): After completing step 1, heat to 595°C, hold for ...

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Abstract

The invention discloses steel for a car. The steel comprises, by mass percent, 0.03%-0.05% of carbon, 0.13%-0.15% of silicon, 0.64%-0.66% of molybdenum, 0.21%-0.23% of bromine, 0.21%-0.23% of boron, 0.74%-0.76% of vanadium, 0.82%-0.84% of zirconium, 0.52%-0.55% of niobium, 2.23%-2.27% of copper, 0.37%-0.39% of sodium, 8.72%-8.75% of chromium, 0.02%-0.04% of thallium, 3.20%-3.22% of nickel and the balance Fe and inescapable impurities.

Description

technical field [0001] The invention relates to a steel product, in particular to a steel product for automobiles and its treatment process. Background technique [0002] With the rapid development of the automobile industry, the standardization of auto parts has also promoted the rapid development of the automobile industry. The demand for steel required for automobile production is increasing day by day. Poor performance, poor high temperature resistance and oxidation resistance. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a steel for automobiles and its treatment process in view of the above shortcomings of the prior art, which not only has high structural strength of the steel plate, but also reduces the friction coefficient of its surface and has strong wear resistance. Increase its service life, reduce costs, good corrosion resistance, high temperature resistance and oxidation resistance. [0004] In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/02C22C38/44C22C38/54C22C38/46C22C38/50C22C38/48C22C38/42C21D1/18C21D9/00C21D8/02C09D133/00C09D163/00C09D5/08C09D7/12
CPCC22C38/02C09D5/08C09D7/61C09D133/00C21D1/18C21D8/0247C21D9/0081C22C38/002C22C38/42C22C38/44C22C38/46C22C38/48C22C38/50C22C38/54C08L63/00C08K13/02C08K2003/2272C08K2003/2241C08K3/34
Inventor 冉宏敏
Owner SUZHOU NIUDONG PRECISION MFG TECH CO LTD
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