High-strength abrasion-proof steel plate capable of soldering without thermal treatment and method of producing the same

A wear-resistant steel plate and high-strength technology, which is applied in the field of weldable high-strength wear-resistant steel plates without heat treatment and its preparation, can solve the problems of difficult finished products, lack of large supply, and lack of heat treatment furnaces, and achieves low prices. Effect

Inactive Publication Date: 2009-05-13
SHENYANG HEAVY MACHINERY GROUP
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  • Description
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Problems solved by technology

Domestic steel rolling enterprises do not produce such steel plates because their rolling equipment does not have heat treatment furnaces.
Although there were reports in 2003 that domestic manufacturers could produce wear-resistant steel plates, there has been no large supply of them so far.
Due to the limitation of heat treatment equipment, my country's wear-resistant steel plates, especially high-strength steel plates, have not yet been developed, and the finished products are difficult

Method used

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  • High-strength abrasion-proof steel plate capable of soldering without thermal treatment and method of producing the same

Examples

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Effect test

Embodiment 1

[0009] Embodiment 1, a weldable high-strength wear-resistant steel plate and the product obtained by its preparation method. The chemical composition (%) of NMG360-1 wear-resistant steel plate is: C: 0.24; Si; 0.86; Mn: 1.62; P: 0.012; S: 0.009; Cr: 1.03; Ni: 0.6; Mo: 0.14; Cu: 0.17; The preparation method is as follows: smelting: use electric furnace to smelt and pour into flat ingots, during the smelting process, control the amount of S and P to ensure the quality of molten steel; Controlled rolling-controlled cooling, that is, in the initial stage of rolling, increase the amount of downcompression in each pass and the corresponding deformation in the two-phase area in the later stage to ensure grain refinement, improve strength and comprehensive mechanical properties, and control cooling during straightening. Different passes of water spray treatment are carried out according to different thicknesses to ensure that the cooling speed of the steel plate does not scrape the no...

Embodiment 2

[0010] Example 2, a weldable high-strength wear-resistant steel plate and the product obtained by its preparation method. The chemical composition (%) of NMG360-2 wear-resistant steel plate is: C: 0.24; Si; 0.87; Mn: 1.72; P: 0.015; S: 0.008; Cr: 1.02; Ni: 0.47; Mo: 0.12; Cu: 0.15; Its preparation method is as follows: smelting: use electric furnace to smelt and pour into flat ingots. During the smelting process, strictly implement the process and control the amount of S and P to ensure the quality of molten steel; rolling: pour molten steel into flat ingots and then roll them. Controlled rolling-controlled cooling is implemented during rolling, that is, at the initial stage of rolling, the amount of down-pressing of each pass and the corresponding deformation amount of the two-phase area in the later stage are increased to ensure grain refinement, improve strength and comprehensive mechanical properties, and control during straightening cool down.

[0011] The embodiments of...

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Abstract

The invention relates to a high-strength wearproof steel plate which can be welded through no heat treatment and is applied to the industry of manufacturing various mechanical equipments, and a preparation method. The preparation method comprises the following steps: 1. smelting: a flat ingot is smelted and poured through an electric furnace; in the smelting process, the S amount and the P amount are controlled so as to ensure the quality of molten steel; and 2. rolling: the molten steel is poured to the flat ingot and is rolled; in steel rolling, the rolling control and the cooling control are actualized, that is, in the initial rolling stage, the pressing amount of a pass and the corresponding deformation amounts of two phase regions of the late stage are enlarged as possible, thereby ensuring the thinning of crystal grains, improving strength and comprehensive mechanical performance and controlling cooling in straightening. Through reasonable composition design, the product and the method adopt a special process technology of rolling control and cooling control and have relatively low price.

Description

Technical field: [0001] The invention relates to a high-strength wear-resistant steel plate that can be welded without heat treatment and a preparation method thereof for manufacturing various mechanical equipment industries. Background technique: [0002] At present, low-alloy wear-resistant steel is a very important wear-resistant material. The total content of alloy elements is small, so the production cost is low, the thermal processing and forming process is simple, and it is more suitable for large-scale industrial production. In foreign countries, the wear-resistant steel plates made of it are widely used. NMG360 is a weldable high-strength martensitic wear-resistant steel. It is mainly used to manufacture weldable high-strength wear-resistant components of various mechanical equipment. It has good weldability and processing performance. For example, loader bucket plates, bulldozer front blades, and excavator shovel plates in construction machinery equipment; mineral...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/02C22C38/58
Inventor 杨桂星杨震华杨树文周寒周胜利赵素珍王化春陈淑平贺扬金丽敏孟丽萍刘洪生孙爱新任风贤刘先金
Owner SHENYANG HEAVY MACHINERY GROUP
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