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A thick gauge high wear resistance steel plate and its manufacturing method

A technology with high wear resistance and manufacturing method, applied in the field of alloy steel, can solve the problems of poor performance uniformity, low production efficiency and high production cost, and achieve the effects of good plate shape, improved plasticity and improved hardenability

Active Publication Date: 2020-06-30
CENT IRON & STEEL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of high production cost, easy to be limited by equipment, low production efficiency, poor performance uniformity and poor plasticity in the existing process

Method used

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  • A thick gauge high wear resistance steel plate and its manufacturing method
  • A thick gauge high wear resistance steel plate and its manufacturing method
  • A thick gauge high wear resistance steel plate and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The chemical composition (mass percentage%) of the thick gauge high wear resistance steel plate of this embodiment is: C: 0.12; Si: 1.23; Mn: 3.9; Cr: 0.82; Ni: 0.55; Mo: 0.31; S: 0.005; : 0.005; V: 0.05; the balance is Fe and unavoidable impurities.

[0044] The specific steps and process parameters are as follows:

[0045] Step 1: using a converter to smelt the raw materials of the steel plate, LF refining, RH refining, and slab continuous casting (350mm continuous casting slab);

[0046] Step 2: Heat the continuous casting slab in a heating furnace to a temperature of 1180°C, hold for 6 hours, and roll it with a medium-thick plate rolling mill, with 5 passes for rough rolling, 9 passes for finish rolling, and 9 passes for finish rolling. The final rolling temperature is 900°C, and the steel plate thickness is 130mm;

[0047] Step 3: After the rolled steel plate is air-cooled to 190°C, it is immediately placed in a heating furnace and heated to a distribution temper...

Embodiment 2

[0049] The chemical composition (% by mass) of the thick gauge high wear resistance steel plate of this embodiment is: C: 0.25; Si: 1.29; Mn: 3.92; Cr: 0.91; Ni: 1.51; Mo: 0.32; S: 0.015; P : 0.015; V: 0.18; the balance is Fe and unavoidable impurities.

[0050] The specific steps and process parameters are as follows:

[0051] Step 1: using a converter to smelt the raw materials of the steel plate, LF refining, and continuous casting of slabs (300mm continuous casting slab);

[0052] Step 2: Heat the continuous casting slab in a heating furnace to a temperature of 1180°C, hold for 8 hours, and roll it with a medium-thick plate rolling mill, with 5 passes for rough rolling, 11 passes for finish rolling, and 11 passes for finish rolling. The final rolling temperature is 850°C, and the thickness of the steel plate is 45mm;

[0053] Step 3: After the rolled steel plate is air-cooled to 200°C, it is immediately put into a heating furnace and heated to a distribution temperature ...

Embodiment 3

[0055] The chemical composition (% by mass) of the thick gauge high wear resistance steel plate of this embodiment is: C: 0.32; Si: 1.29; Mn: 4.62; Cr: 0.51; Ni: 0.51; Mo: 0.32; S: 0.015; : 0.015; V: 0.20; the balance is Fe and unavoidable impurities.

[0056] The specific steps and process parameters are as follows:

[0057] Step 1: use a converter to smelt the raw materials of the steel plate, LF refining, and die casting (750mm flat ingot);

[0058] Step 2: Heat the steel ingot in a heating furnace to a temperature of 1220°C, hold for 8 hours, and roll it with a medium-thick plate rolling mill, with 5 passes for rough rolling, 7 passes for finish rolling, and finally The rolling temperature is 1000℃, and the steel plate thickness is 395mm;

[0059] Step 3: After the rolled steel plate is air-cooled to 200°C, it is immediately placed in a heating furnace and heated to a distribution temperature of 300°C for distribution. The distribution time is 120 minutes. After the dist...

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Abstract

The invention discloses a thick-specification high-wear-resistance steel plate and a manufacturing method thereof, and belongs to the technical field of alloy steel. The problems that the existing process is high in production cost, easy to limit by equipment, low in production efficiency, poor in performance uniformity and poor in plasticity are solved. The steel plate comprises the following components of, in percentage by mass, 0.05-0.5% of C, 3.0-5.0% of Mn, 1.0-1.5% of Si, 0.20-2.50% of Cr, 0.20-2.50% of Ni, 0.10-0.50% of Mo, 0.01-0.5% of V, less than or equal to 0.03 of S, less than or equal to 0.03 of P, and the balance Fe and inevitable impurity elements. According to the thick-specification high-wear-resistance steel plate and the manufacturing method thereof, the thickness of thesteel plate can reach 400 mm, after the steel plate is rolled, an on-line air-cooling quenching and partitioning process is adopted, the hardness difference between the surface and the core part is not more than 5%, the structure performance uniformity is good, and the requirements of the thick-specification wear-resistant steel plate are met. The steel plate is especially suitable for transshipment machines, excavators and various mine machines.

Description

technical field [0001] The invention relates to the technical field of alloy steel, in particular to a thick gauge high wear resistance steel plate and a manufacturing method thereof. Background technique [0002] Wear-resistant steel plates are widely used in mechanical products such as scraper conveyors, loaders, Machines, dump trucks and various mining machinery, etc. The traditional wear-resistant steel plate is mainly made of low-carbon martensitic wear-resistant steel, which is produced by quenching + low-temperature tempering process, and the product meets the national standard (high-strength wear-resistant steel plate for construction machinery GB / T 24186-2009); the traditional heat treatment production process is subject to The capacity of quenching / tempering equipment is greatly restricted, and the production efficiency is low. Especially for thick products (above 80mm), the production is very difficult. The uniformity of the surface and core of the steel plate is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/04C22C38/02C22C38/44C22C38/46C22C33/04C21D8/02
Inventor 梁小凯孙新军刘清友贾书君黄涛汪兵陈小平童帅
Owner CENT IRON & STEEL RES INST
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