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Ultra-fine grain high-toughness wear-resistant steel and manufacturing method thereof

A technology of wear-resistant steel and high toughness, which is applied in the field of ultra-fine-grained high-toughness wear-resistant steel and its manufacturing. It can solve the problems of low impact toughness, achieve high hardenability, improve low-temperature impact performance, structure uniformity and mechanical properties Good uniform effect

Active Publication Date: 2022-04-15
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012]The object of the present invention is to overcome the problems and shortcomings of the above-mentioned particle-reinforced wear-resistant steel due to the introduction of micron-sized particles that cause its impact toughness to be low and to provide an ultra-fine Crystalline high toughness wear-resistant steel and its manufacturing method, refine the structure and grain, improve the impact energy of wear-resistant plate

Method used

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  • Ultra-fine grain high-toughness wear-resistant steel and manufacturing method thereof
  • Ultra-fine grain high-toughness wear-resistant steel and manufacturing method thereof
  • Ultra-fine grain high-toughness wear-resistant steel and manufacturing method thereof

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Embodiment Construction

[0054] Below by embodiment the present invention will be further described.

[0055] The embodiments of the present invention carry out smelting, casting, rolling and heat treatment according to the composition ratio of the technical solution. Billet thickness / steel final rolling thickness ≥ 4, billet heating temperature 1080-1260°C, billet furnace time 1.2-2.0min / mm.

[0056] The rolling start temperature is 950-1150°C, the final rolling temperature is 830-1060°C, and air-cooled to room temperature after rolling.

[0057] Heat treatment includes normalizing and tempering, the normalizing heating temperature is 810-850°C, the normalizing holding time is 1.0-3.0min / mm; the tempering heating temperature is 250-350°C, and the tempering holding time is 1.0-2.0min / mm.

[0058] Billet can be continuous casting billet or die casting billet

[0059] The composition of the steel of the embodiment of the present invention is shown in Table 1. The main process parameters of the steel ...

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Abstract

The invention provides ultra-fine grain high-toughness wear-resistant steel and a manufacturing method thereof. The ultra-fine grain high-toughness wear-resistant steel comprises the following components in percentage by weight: 0.32-0.40% of C, 0.9-1.7% of Si, 2.5-4.0% of Mn, less than or equal to 0.015% of P, less than or equal to 0.008% of S, 0.20-0.40% of Mo, 1.3-2.0% of Ni, 0.45-0.55% of Ti, 0.015-0.05% of Als, less than or equal to 0.010% of N, less than or equal to 0.0030% of O, less than or equal to 0.00020% of H and the balance of Fe and inevitable impurities. The manufacturing method comprises the steps of smelting, casting, rolling and heat treatment. According to the steel plate produced through the method, the yield strength reaches 1006-1221 MPa, the tensile strength reaches 1319-1497 MPa, the surface hardness reaches 467-461 HBW, the core hardness reaches 448-488 HBW, the core hardness is not lower than 95% of the surface hardness, and the ballistic work at the temperature of-20 DEG C is larger than or equal to 24 J.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an ultra-fine-grained high-toughness wear-resistant steel and a manufacturing method thereof. Background technique [0002] Low-alloy wear-resistant steel uses tempered martensite as the structure, and is characterized by low cost, good weldability, and excellent toughness. It is currently the most widely used wear-resistant steel. As users put forward higher requirements for wear resistance, high wear resistance steel has been developed rapidly, and particle strengthening is one of the technical means to improve the wear resistance of steel. [0003] The idea of ​​particle strengthening wear-resistant steel is to introduce dispersed and distributed stable compound particles into the steel matrix to improve the wear resistance of steel with high particle hardness. Studies have shown that micron-sized particles of TiC can significantly enhance the wear resistance of stee...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/08C22C38/12C22C38/14C21D1/00C21D1/28C21D6/00C21D8/02
CPCY02P10/20
Inventor 纪汶伯张涛林田子杨颖张哲王玉博
Owner ANGANG STEEL CO LTD