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Method for producing wear-resisting hot-rolling steel plate by using furnace rolling machine and steel plate prepared by the same method

A technology of steel coil rolling mill and hot-rolled steel plate, which is applied in the direction of rolling mill control device, metal rolling, metal rolling, etc., can solve the problems of producing wear-resistant hot-rolled steel plate, and achieve the effect of short process, low cost and high strength

Inactive Publication Date: 2008-05-28
NANJING IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no way to produce wear-resistant hot-rolled steel plates on the steckel mill line

Method used

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  • Method for producing wear-resisting hot-rolling steel plate by using furnace rolling machine and steel plate prepared by the same method
  • Method for producing wear-resisting hot-rolling steel plate by using furnace rolling machine and steel plate prepared by the same method
  • Method for producing wear-resisting hot-rolling steel plate by using furnace rolling machine and steel plate prepared by the same method

Examples

Experimental program
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Effect test

Embodiment 1

[0037] This embodiment uses low-carbon and high-silicon components, and its mass percentage is: component content: C: 0.15-0.26%, Mn: 1.6-2.1%, P≤0.015%, S≤0.005%, Si: 1.6-2.0% , add an appropriate amount of alloys such as Cr, Mo, Nb and V (Cr: 0.6-1.0%, Mo: 0.3-0.6%, Nb: 0.015-0.045%, V: 0.05-0.080%), and give full play to C, Si, Mn , Mo, V, Nb, and Cr combined to produce NR360 wear-resistant steel plates with a thickness of 20mm, 30mm, and 40mm and NR400 wear-resistant steel plates with a thickness of 25mm on the steckel mill.

[0038] During the specific implementation, 20mm, 30mm, and 40mm NR360 steel plates and 25mm thick NR400 steel plates were rolled on the steckel rolling mill, and the TMCP process was used to realize the austenitic steel plate through dynamic and sub-dynamic recrystallization in the rough rolling stage. Homogenization and refinement of bulk grains. By controlling the final rolling temperature in the finishing rolling stage, it is controlled between 8...

Embodiment 2

[0048] This embodiment uses low-carbon and high-silicon components, and its mass percentage is: component content: C: 0.15-0.26%, Mn: 1.6-2.1%, P≤0.015%, S≤0.005%, Si: 1.6-2.0% , add an appropriate amount of alloys such as Cr, Mo, Nb and V (Cr: 0.6-1.0%, Mo: 0.3-0.6%, Nb: 0.015-0.045%, V: 0.05-0.080%), and give full play to C, Si, Mn , Mo, V, Nb, Cr comprehensive effect, the thickness of 10mm, 12mm, 14mm NR360 wear-resistant steel plate and the thickness of 10mm, 12mm NR400 wear-resistant steel plate are produced on the coil rolling mill.

[0049] In the specific implementation, the coil rolling is adopted on the steckel rolling mill, the traditional flat rolling method is adopted in the first few passes, and the coil rolling method is adopted for the next few passes. Using two coiling furnaces before and after the rolling mill, reciprocating coiling rolled. Similar to the thick specification, the homogenization and refinement of austenite grains can be achieved through dynam...

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Abstract

The invention discloses a production process of using a steckel mill to produce wear-resistant steels and produced steel plates thereof. Selected components of the invention are that C<=0.30%, Mn<= 2.5%, P <= 0.015%, S <= 0.005% and Si <= 2.2%. Continuous casting slab of alloys which includes Cr, Mo, Nb, V and the like (Cr <= 1.3%, Mo <= 0.9%, Nb <= 0.05%, V <= 1.0%) is moderately added. The invention employs warm loading and delivery. Steel plates of medium thickness are flatly rolled on the steckel mill with the employment of TMCP + off-line tempering processes, thin steel plates utilize coil rolling + cooling control + off-line tempering processes, and the uniformity, thinning and intensification of tissue are realized by controlling dynamic recrystallization and meta-dynamic recrystallization in the rough rolling stage, strain accumulation and relaxation process in the finely rolling stage, cooling rate within the range of producing lower bainite, and final cooling temperature between the formation temperature of lower bainite and the formation temperature of martensite by employing the off-line low tempering temperature which is equal to or less than 350 DEG C(<= 350 DEG C), thereby ensuring high-intensity, high ductility and abrasion resistant combination property of the steel plates.

Description

technical field [0001] The invention relates to a steel plate and a production method thereof, in particular to a method for producing a wear-resistant hot-rolled steel plate using a steel coil mill and the steel plate produced. Background technique [0002] Wear-resistant hot-rolled steel plate has excellent performance and can be widely used in mining, coal mining machinery, cement, metallurgy, national defense and military industries, mainly used in loading and unloading machinery, excavators, dump trucks, conveying equipment, trucks, blades, crushers, waste cleaning and recycling equipment and other wear-resistant equipment industries. [0003] In the prior art, at present, there are mainly three types of methods for producing wear-resistant steel hot-rolled steel plates at home and abroad. The first one is the patent No. 200310119034.4, the patent name is "a wear-resistant steel plate with high hardness, high toughness and easy flame cutting and its preparation method"...

Claims

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Application Information

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IPC IPC(8): C21D8/02C21D11/00B21B37/00C22C38/38
Inventor 张逖何宜柱梁学平
Owner NANJING IRON & STEEL CO LTD
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