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High-strength and high-toughness wear-resistant steel and preparation method for nano twin crystal reinforcement and toughening of high-strength and high-toughness wear-resistant steel

A nano-twinned, wear-resistant steel technology, applied in metal rolling, temperature control, rolling force/gap control, etc.

Active Publication Date: 2021-09-14
上交(徐州)新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the preparation of high-strength, toughness and wear-resistant alloys based on the principle of introducing high-density nano-twins and nano-precipitation based on deformation heat treatment.

Method used

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  • High-strength and high-toughness wear-resistant steel and preparation method for nano twin crystal reinforcement and toughening of high-strength and high-toughness wear-resistant steel
  • High-strength and high-toughness wear-resistant steel and preparation method for nano twin crystal reinforcement and toughening of high-strength and high-toughness wear-resistant steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A preparation method for high-strength and tough wear-resistant steel and nano-twin reinforcement and toughening thereof, the steps are as follows:

[0064] (1) Alloy smelting and negative pressure casting: the mass percentage of the chemical composition of the alloy is: C: 0.35%, Mn: 24.8%, Si: 0.1%, Al: 1.0%, S: 0.005%, P: 0.01%, Nb: 0.5%, Ti: 0.2%, V: 0.2%, N 0.05%, rare earth RE: 0.02%, the balance is Fe and unavoidable impurities; according to the above composition, it is evenly stirred and smelted in a vacuum induction furnace, and electroslag is weighed After melting, negative pressure casting into ingot;

[0065] (2) Homogenization heat treatment and blanking: the ingot obtained in step (1) is subjected to high-temperature homogenization treatment at 1200°C, the holding time is 4h, air-cooled to 1100°C for forging, the final forging temperature is 950°C, and the material after billeting The thickness is 60mm, water-cooled to room temperature, negative pressure ...

Embodiment 2

[0071] A preparation method for high-strength and tough wear-resistant steel and nano-twin reinforcement and toughening thereof, the steps are as follows:

[0072] (1) Alloy smelting and negative pressure casting: the mass percentage of the chemical composition of the alloy is: the mass percentage of the chemical composition of the alloy is: C: 0.85%, Mn: 15.2%, Si: 0.5%, Al: 0.5%, S: 0.004% , P: 0.005%, Nb: 1.5%, Ti: 0.8%, V: 0.75%, N 0.005%, rare earth RE: 0.5%, the balance is Fe and unavoidable impurities; uniform in a vacuum induction furnace according to the above composition Stirring and smelting, and after electroslag remelting, negative pressure casting into ingots;

[0073] (2) Homogenization heat treatment and blanking: the ingot obtained in step (1) is subjected to high-temperature homogenization treatment at 1280°C, the holding time is 2h, air-cooled to 1100°C for forging, the final forging temperature is 980°C, and the material after billeting The thickness is 70...

Embodiment 3

[0079] A kind of preparation method of high-strength and tough wear-resistant steel and its nano-twin strengthening and toughening, such as figure 1 As mentioned, the steps are as follows:

[0080] (1) Alloy smelting and negative pressure casting: the mass percentage of the chemical composition of the alloy is: C: 0.5%, Mn: 20%, Si: 0.25%, Al: 0.9%, S: 0.005%, P: 0.01%, Nb: 1.0%, Ti: 0.5%, V: 0.5%, N 0.01%, rare earth RE: 0.5%, the balance is Fe and unavoidable impurities; according to the above composition, it is evenly stirred and smelted in a vacuum induction furnace, and electroslag is weighed After melting, negative pressure casting into ingot;

[0081] (2) Homogenization heat treatment and billet opening are the same as step (2) of Example 1, the homogenization temperature is 1250°C, the heat preservation is 3.0h, the rolling start temperature is 1100°C, the intermediate rolling temperature is 950°C, and the billet thickness is 60mm .

[0082] (3) Hot rolling: heat th...

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Abstract

The invention relates to high-strength and high-toughness wear-resistant steel and a preparation method for nano twin crystal reinforcement and toughening of high-strength and high-toughness wear-resistant steel. The steel comprises the components in percent by mass: 0.35%-0.85% of C, 15.2%-24.8% of Mn, 0.1%-0.5% of Si, smaller than or equal to 1.0% of Al, smaller than or equal to 0.005% of S, smaller than or equal to 0.01% of P, 0.5%-1.5% of Nb, 0.2%-0.8% of Ti, 0.2%-0.75% of V, 0.005%-0.05% of N, 0.02%-0.1% of rare earth RE and the balance Fe and inevitable impurities. The stacking fault energy of an alloy is 24-30 kJ / m <2>, and the mass percent of the addition amount of Ti, Nb and V is 2: 1: 1. The preparation process comprises the steps of alloy smelting and negative pressure casting, homogenization heat treatment and cogging, hot rolling, nanometer twinning treatment, nanometer twinning stabilization and low-temperature aging treatment. According to the invention, fine structure regulation and control are carried out based on means of deformation and heat treatment by means of low fault energy and microalloying component optimization matching design, so that good structure matching is realized, and the alloy has high strength, high toughness and high wear resistance. The wear-resistant steel is excellent in comprehensive mechanical property, low in alloy cost, simple in preparation process, low in production and manufacturing cost and easy to put into industrial production and large-scale industrial equipment.

Description

technical field [0001] The invention relates to the technical field of wear-resistant steel and its processing and preparation, in particular to a high-strength and tough wear-resistant steel and a method for preparing it through nano-twin strengthening and toughening. Background technique [0002] Iron and steel materials are still the most important engineering materials with the strongest adaptability and versatility. Its rich equipment experience, low production costs, and wide performance plasticity space are unmatched by other materials in the short term. In recent years, steel materials have been more widely used in key fields such as aerospace, national defense and military industry, and new transportation technology. The steel industry is also developing in the direction of green, environmental protection, energy saving and emission reduction. Comprehensive mechanical properties put forward requirements. Manganese alloy wear-resistant steel is a commonly used high-...

Claims

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Application Information

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IPC IPC(8): C22C38/04C22C38/02C22C38/06C22C38/12C22C38/14C22C33/04C21D8/02C21D1/18B21B1/26B21B37/74B21B37/58
CPCC22C38/04C22C38/02C22C38/06C22C38/12C22C38/14C22C38/001C22C38/005C22C33/04C21D8/0205C21D8/0226C21D8/0247C21D8/0236C21D8/0221C21D1/18B21B1/26B21B37/74B21B37/58C21D2211/001C22C2200/04Y02P10/25
Inventor 不公告发明人
Owner 上交(徐州)新材料研究院有限公司
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