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High-strength anti-abrasion anti-corrosion alloy steel material and preparation method thereof

An alloy steel and anti-corrosion technology, applied in the field of alloy steel materials, can solve the problems of deterioration of corrosion resistance, high carbon content, poor resistance to slurry corrosion, etc. Effect

Inactive Publication Date: 2017-12-01
GUANGDONG INST OF MATERIALS & PROCESSING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, alloy steels have the problems of high carbon content and poor corrosion resistance. For example, in the medium-chromium alloy steel disclosed in CN104278217A, the C content is 2.1 to 3.3 wt%, and it is easy to form compounds with chromium and distribute in a network. It is easy to be brittle and cracked under the action of obvious impact stress, and the high carbon content has an important influence on the deterioration of the corrosion resistance of the material; CN105385939A discloses that the alloy steel with a carbon content of 0.3-0.58wt% is resistant to ore slurry under the wet grinding conditions of mines Corrosion ability is poor; CN104532130A disclosed wet ball mill also has the problem of poor corrosion resistance

Method used

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preparation example Construction

[0037] The present invention also provides a preparation method for the high-strength and wear-resistant alloy steel material described in the above technical solution, comprising the following steps:

[0038] (1) Melting steel source, chromium source, deoxidizer, silicon source, molybdenum source, nickel source, manganese source and rare earth cerium to obtain molten steel;

[0039] (2) casting the molten steel obtained in the step (1) to obtain an alloy steel casting;

[0040] (3) performing annealing, quenching and tempering sequentially on the alloy steel casting obtained in the step (2) to obtain an anti-corrosion alloy steel material.

[0041]The invention melts steel source, chromium source, deoxidizer, silicon source, molybdenum source, nickel source, manganese source and rare earth cerium to obtain molten steel. In the present invention, the chromium source is preferably ferrochromium, the steel source is preferably steel scrap, the silicon source is preferably ferro...

Embodiment 1

[0058] A high-strength and corrosion-resistant alloy steel material, including the following components in weight percentage: C: 0.26%, Cr: 7.11%, Si: 0.83%, Mn: 0.67%, Mo: 0.42%, Ni: 0.73%, Ce: 0.2%, P≤0.04%, S≤0.04%, the balance is Fe.

[0059] Its preparation method steps are as follows:

[0060] ① Use scrap steel, ferrochromium, aluminum deoxidizer, ferrosilicon, ferromolybdenum, nickel plate and ferromanganese as raw materials to melt slag three times in an intermediate frequency induction furnace at 1600 ° C to obtain molten steel, in which the quality of aluminum deoxidizer is the quality of molten steel When the melting temperature of molten steel reaches 1650°C, it is poured into a ladle with a baking temperature of 800°C, and the required mass percentage of rare earth cerium is added to the bottom of the ladle, and the molten steel is poured into the casting In the mold, alloy steel castings are obtained;

[0061] ② The obtained alloy steel castings were annealed a...

Embodiment 2

[0064] A high-strength and corrosion-resistant alloy steel material, including the following components in weight percentage: C: 0.26%, Cr: 7.10%, Si: 1.57%, Mn: 0.69%, Mo: 0.42%, Ni: 0.72%, Ce: 0.2%, P≤0.04%, S≤0.04%, the balance is Fe.

[0065] Its preparation method steps are as follows:

[0066] ①Using scrap steel, ferrochromium, aluminum deoxidizer, ferrosilicon, ferromolybdenum, nickel plate and ferromanganese as raw materials, melt slag four times in an intermediate frequency induction furnace at 1620°C to obtain molten steel, in which the quality of aluminum deoxidizer is the quality of molten steel When the melting temperature of molten steel reaches 1620°C, it is poured into a ladle with a baking temperature of 900°C, and the required mass percentage of rare earth cerium is added to the bottom of the ladle, and the molten steel is poured into the casting In the mold, alloy steel castings are obtained;

[0067] ② The obtained alloy steel castings were annealed at a ...

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Abstract

The invention provides a high-strength anti-abrasion anti-corrosion alloy steel material. The high-strength anti-abrasion alloy steel material comprises, by weight, 0.23-0.28% of C, 6.0-8.0% of Cr, 0.8-2.5% of Si, 0.5-0.8% of Mn, 0.3-0.5% of Mo, 0.6-0.8% of Ni, 0.1-0.2% of Ce, 0-0.04% of P, 0-0.04% of S, and the balance Fe. The strength, toughness, abrasion resistance and corrosion resistance of the alloy steel material are improved. Data of the embodiment indicate that the Rockwell hardness of the alloy steel material provided by the invention reaches 54.5 HRC, the tensile strength is 1902MPa, the impact toughness is 81J / cm<2>, the corrosion rate of high-manganese steel in a simulated weak acid copper ore pulp solution is 2.40 times that of the alloy steel material, the dynamic corrosion and abrasion rate of the high-manganese steel is 1.85 times that of the alloy steel material, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of alloy steel materials, in particular to a high-strength and anti-corrosion alloy steel material and a preparation method thereof. Background technique [0002] High-strength corrosion-resistant steel is widely used in service equipment such as pipelines, propellers, pumps, turbines, liners, shovel teeth, etc. In fact, my country's annual demand is more than 10 million tons. People have put forward higher requirements for the comprehensive performance of high-strength corrosion-resistant steel, including its comprehensive mechanical properties (hardness, impact toughness, strength, etc.), slurry corrosion resistance and wear resistance. The development of alloy materials with low cost, high strength and toughness, and high wear and corrosion resistance is an effective way to ensure service life and safety. [0003] In the prior art, alloy steels have the problems of high carbon content and poor corrosion ...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/34C22C38/04C22C38/44C22C33/04C21D1/18C21D1/26
CPCC21D1/18C21D1/26C22C33/04C22C38/005C22C38/02C22C38/04C22C38/34C22C38/44
Inventor 郑志斌郑开宏龙骏王海艳王娟李惠
Owner GUANGDONG INST OF MATERIALS & PROCESSING
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