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Carbides-free bainite wear resistant steel plate and production process thereof

A technology of wear-resistant steel plate and production process, which is applied in the direction of temperature control, etc., can solve the problems of complex process, low product strength and toughness, etc., and achieve the effect of ensuring high toughness, good toughness and reducing crack rate

Active Publication Date: 2009-01-07
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bainitic wear-resistant steel plates produced by the above methods have their own characteristics, but the process is still relatively complicated, and the product strength and toughness are not very high.

Method used

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  • Carbides-free bainite wear resistant steel plate and production process thereof
  • Carbides-free bainite wear resistant steel plate and production process thereof
  • Carbides-free bainite wear resistant steel plate and production process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The composition weight percent of the carbide-free bainite wear-resistant steel plate in this embodiment is: C: 0.15%, Mn: 1.50%, P: 0%, S: 0.006%, Si: 1.30%, Al: 0.60%, Cr : 0.60%, Mo: 0.25%, Nb: 0.010%, Fe: balance.

[0028] The production process of the above carbide-free bainite wear-resistant steel plate is carried out according to the following procedures:

[0029] (1) The continuous casting slab is sent to the heating furnace and heated to 1200°C, and the temperature of the furnace is controlled at 1200±10°C.

[0030] (2) Send the heated continuous casting slab to the hot rolling production line for controlled rolling and controlled cold rolling. Two-stage rolling is adopted, the final rolling temperature in the finishing rolling stage is controlled at 880°C, and the pass strain in the finishing rolling stage is controlled >1, control the cooling rate ≥5°C / s, and control the final cooling temperature at 580°C.

[0031] (3) After rolling, the rolled steel plate ...

Embodiment 2

[0033] The composition weight percent of the carbide-free bainite wear-resistant steel plate of this embodiment is: C: 0.25%, Mn: 2.00%, P: 0.015%, S: 0%, Si: 2.00%, Al: 0.20%, Cr : 1.00%, Mo: 0.50%, Nb: 0.035%, Fe: balance.

[0034] The production process of the above carbide-free bainite wear-resistant steel plate is carried out according to the following procedures:

[0035] (1) The continuous casting slab is sent to the heating furnace and heated to 1250°C, and the temperature of the furnace is controlled at 1200±10°C.

[0036] (2) Send the heated continuous casting slab to the hot rolling production line for controlled rolling and controlled cold rolling. Two-stage rolling is adopted. The final rolling temperature in the finishing rolling stage is controlled at 870°C, and the pass strain in the finishing rolling stage is controlled. >1, control the cooling rate ≥10°C / s, control the final cooling temperature at 630°C, and straighten. (3) After rolling, the rolled steel p...

Embodiment 3

[0038]The composition weight percent of the carbide-free bainite wear-resistant steel plate in this embodiment is: C: 0.20%, Mn: 1.6%, P: 0.01%, S: 0.004%, Si: 1.50%, Al: 0.40%, Cr: 0.80%, Mo: 0.30%, Nb: 0.020%, Fe: balance.

[0039] The production process of the above carbide-free bainite wear-resistant steel plate is carried out according to the following procedures:

[0040] (1) The continuous casting slab is sent to the heating furnace and heated to 1250°C, and the temperature of the furnace is controlled at 1200±10°C.

[0041] (2) Send the heated continuous casting slab to the hot rolling production line for controlled rolling and controlled cold rolling. Two-stage rolling is adopted, the final rolling temperature in the finishing rolling stage is controlled at 860°C, and the pass strain in the finishing rolling stage is controlled >1, control the cooling rate ≥5°C / s, control the final cooling temperature at 590°C, and straighten.

[0042] (3) After rolling, the rolled ...

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Abstract

The invention relates to a steel and a production technique thereof, in particular to a non-carbide bainite wear-resistant steel plate and a production technique thereof; the component weight percentages are: 0.15 to 0.25 percent of C, 1.50 to 2.00 percent of Mn, 0 to 0.015 percent of P, 0 to 0.006 percent of S, 1.30 to 2.00 percent of Si, 0.20 to 0.60 percent of Al, 0.60 to 1.00 percent of Cr, 0.25 to 0.50 percent of Mo, 0.010 to 0.035 percent of Nb and the rest is Fe. The production technique is carried out according to the following working procedures: (1) feeding a continuous casting plate to a heating furnace for heating; (2) feeding the continuous casting plate after being heated into a hot rolling production line to carry out the rolling of controlled rolling and controlled cooling; (3) carrying out middle-low temperature drawing temper on a rolling steel plate after the rolling is finished. The non-carbide bainite wear-resistant steel plate can be produced by the working procedures without carrying out online or offline hardening and tempering thermal processing which not only can simplify the working procedures of production, but also can improve the performance and the quality of a product as well as obtain the bainite wear-resistant steel with high intensity and high toughness.

Description

technical field [0001] The invention relates to a steel plate and its production process, in particular to a carbide-free bainite wear-resistant steel plate and its production process. Background technique [0002] As an important class of steel structural materials, high-strength and toughness wear-resistant steel plates require excellent comprehensive properties such as high strength and toughness, high hardness, weldability, and wear resistance. They are widely used in mining machinery, vehicles, ships, bridges, and engineering machinery. [0003] The foreign high-strength toughness wear-resistant steel plate manufacturing technology adopts the on-line direct quenching process after rolling. Its chemical composition design uses low carbon and a small amount of alloying elements, and it is supplied in a quenched and tempered state. The main structure is tempered martensite. Wear-resistant steel plate has the characteristics of relatively low alloy content, high strength an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C21D8/02B21B37/74
Inventor 张逖斯松华党军郭怀兵梁学平
Owner NANJING IRON & STEEL CO LTD
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