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A kind of wear-resistant liner and its preparation method

A technology of wear-resistant lining board and lining board, applied in the field of wear-resistant lining board and its preparation, wear-resistant lining board, can solve the problem of high cost, and achieve the effect of improving strength, low cost, and dispersion strengthening

Inactive Publication Date: 2015-09-30
NINGBO HUADIAN CAST STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to improve the toughness of the wear-resistant liner, in the prior art, the rare element nickel is doped in the alloy steel of the wear-resistant liner. , its alloy composition is: C: 0.6-0.68%, Cr: 0.8-1.2%, Ni: 0.15-0.25%, Mn: 1.2-1.6%, Mo: 0.2-0.35%, Cu: 0.3-0.4%, Si: 0.2-0.3%, P and S are not more than 0.035%, Re: 1.8-2.2%, and the balance is Fe and unavoidable impurities. Nickel, molybdenum, resulting in higher cost

Method used

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  • A kind of wear-resistant liner and its preparation method
  • A kind of wear-resistant liner and its preparation method
  • A kind of wear-resistant liner and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Determine the composition and mass percentage of the wear-resistant liner according to Example 1 of Table 1. The composition and mass percentage of the wear-resistant liner have a certain impact on the mechanical properties of the liner, and its preparation process has an impact on the final wear-resistant The mechanical properties of the liner also have a greater influence.

[0043] Prepare the wear-resistant liner as follows:

[0044] Raw material preparation: prepare raw materials according to the composition elements and mass percentages of the wear-resistant lining plate described in Example 1 in Table 1.

[0045] Casting: smelting the above-mentioned prepared raw materials and pouring molding at a temperature of 1520°C to obtain a forming liner.

[0046] Riser cutting: Preheat the above forming liner at 350°C for 3 hours, then heat cut and plan.

[0047] Heat treatment: The surface of the above-mentioned heat-planed liner is polished, then normalized when the te...

Embodiment 2

[0049] Prepare the wear-resistant liner as follows:

[0050] Preparation of raw materials: Prepare raw materials according to the composition elements and mass percentages of the wear-resistant lining plate described in Example 2 in Table 1. Casting: smelting the above-mentioned prepared raw materials and pouring molding at a temperature of 1525°C to obtain a molding liner.

[0051] Riser cutting: Preheat the above-mentioned forming liner at 400°C for 4 hours, then heat cut and plan.

[0052] Heat treatment: The surface of the formed liner after the above-mentioned hot planing is polished, and then normalized when the temperature is raised to 980 ° C, and the temperature is kept for 3 hours after normalizing. Quenching is carried out when the temperature is 940°C. After quenching, it is kept for 2 hours, and then it is taken out of the furnace and air-cooled. Temper at a temperature of 210°C, and keep warm for 3 hours after tempering to obtain a finished wear-resistant linin...

Embodiment 3

[0054] Prepare the wear-resistant liner as follows:

[0055] Preparation of raw materials: Prepare raw materials according to the composition elements and mass percentages of the wear-resistant lining plate described in Example 3 in Table 1. Casting: smelting the above-mentioned prepared raw materials and pouring molding at a temperature of 1530°C to obtain a forming liner.

[0056] Riser cutting: Preheat the above-mentioned forming liner at 480°C for 4 hours, then heat cut and plan.

[0057] Heat treatment: The surface of the above-mentioned hot-planed liner is polished, then normalized when the temperature is raised to 990°C, and kept for 4 hours after normalizing. Quenching is carried out when the temperature is 950°C. After quenching, it is kept for 3 hours, and then it is taken out of the furnace and air-cooled. Temper at a temperature of 220°C, and keep warm for 4 hours after tempering to obtain a finished wear-resistant lining.

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Abstract

The invention discloses a wear-resistant lining board and a preparation method thereof. The invention solves the problems of high cost and the like in the wear-resistant lining board in the prior art. The wear-resistant lining board comprises the following component elements in percentage by mass: 0.25%-0.30% of C, 0.70%-0.90% of Mn, 0.30%-0.60% of Si, 0.8%-1.10% of Cr, 0.15%-0.25% of Mo, 0.015%-0.050% of Al, 0.025%-0.050% of Zr, at most 0.50% of Cu, at most 0.020% of Nb, at most 0.020% of Sn and the balance of Fe and inevitable impurity. The invention also provides a preparation method of the wear-resistant lining board, which comprises the following steps: proportioning, casting, casting head cutting and heat treatment. The wear-resistant lining board disclosed by the invention has the advantages of low cost, favorable mechanical properties and long service life.

Description

technical field [0001] The invention relates to a wear-resistant liner, in particular to a wear-resistant liner and a preparation method thereof, belonging to the field of metal materials. Background technique [0002] my country consumes about 200,000 tons of mill linings and 200,000 tons of crusher linings each year, worth nearly 2 billion yuan. Therefore, reducing the loss of lining materials is of great economic significance. After more than 30 years of development, the production and application of lining materials at home and abroad have experienced high manganese steel, ordinary white cast iron, nickel hard cast iron, high chromium cast iron to austenitic high manganese steel and various quenching and tempering processes. The development stage of several materials such as smelted medium and low alloy steel. Among the several materials mentioned above, high chromium cast iron has good wear resistance but poor toughness. Austenitic high-manganese steel has high toughn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/28C21D1/28C21D1/18C21D9/00
Inventor 王曙光
Owner NINGBO HUADIAN CAST STEEL
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