A kind of 500hb wear-resistant steel plate and its manufacturing method

Abstract

The invention discloses a 500 HB wear resistant steel plate, whose chemical elements contain, by weight, 0.23-0.33% of C, 0.10-0.50% of Si, 0.50-1.50% of Mn, Cr being less than or equal to 1.50%, Mo being less than or equal to 0.80%, 0.01-0.10% of Al, 0.01-0.10% of Ti, 0.0005-0.0040% of B, 0.01-0.08% of RE, 0.002-0.010% of Ca, Ni being less than or equal to 2.50%, P being less than or equal to 0.050%, S being less than or equal to 0.030%, and the balance being Fe and other unavoidable impurities. In addition, the mass percentages of the above chemical elements satisfy the following conditions: (Si+Mn) is less than or equal to1.50% and greater than or equal to 0.50%; (Al+Ti) is less than or equal to 0.15% and greater than or equal to 0.03%. Correspondingly, the invention also provides a manufacturing method of the 500 HB wear resistant steel plate. The steel plate prepared by the method has good mechanical processing property and its rigidity can reach over 500 HB.

Description

technical field [0001] The invention relates to a wear-resistant steel plate in the field of metallurgy and a manufacturing method thereof, in particular to a 500HB-grade wear-resistant steel plate and a manufacturing method thereof. Background technique [0002] In various engineering fields, when the working conditions of the materials used in the project are particularly harsh, it is often necessary to use wear-resistant steel plates with high strength and high hardness to reduce the wear of the equipment and prolong the service life of the equipment. [0003] The wear resistance of the steel plate mainly depends on its hardness. In addition, the toughness of the steel also has a certain influence on the wear resistance of the steel. Generally speaking, the higher the strength and hardness of the steel, the higher the content of carbon and alloy. The worse the welding performance, the worse the cutting and bending performance, which limits the wide application of high-har...

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Problems solved by technology

As can be seen from Table 1, the publication numbers are respectively CN1132264 (disclosure date is October 2, 1996), CN1189542 (disclosure date is August 5, 1998), CN1385549 (disclosure date is December 18, 2002) and The steel grades described in the Chinese patent document of CN1132263 (disclosure date is October 2, 1996) are all high carbon-high silicon-high manganese-high chromium composition systems, and the alloy content is high, which is detrimental to weldability and toughness, etc. Performance; Publication No. CN1865481 (publication date is November 22, 2006) described in the Chinese patent literature is a high silicon-high manganese composition system, although its carbon content is low, it is detrimental to toughness; open No. FR2847272 (publication date is May 21, 2004) disclosed in the French patent literature has many types of alloy elements, high content, high cost, and is not conducive to welding and machining

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