1200MPa heat-treatment-free low-cost troostite tool steel and production method

A 1.1200mpa, heat-free technology, applied in the field of iron and steel material preparation, can solve the problems of large amount of ferrite, low hardness and large size of steel plate, and achieve the effect of reducing production cost, saving energy consumption and good performance.

Active Publication Date: 2021-10-26
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The steel plate obtained by this process has a lot of ferrite and is large in size. It must be quenched and tempered before it can be used. Moreover, the hardness after heat treatment is low, which cannot meet the requirements of high-end tool steel.

Method used

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  • 1200MPa heat-treatment-free low-cost troostite tool steel and production method
  • 1200MPa heat-treatment-free low-cost troostite tool steel and production method
  • 1200MPa heat-treatment-free low-cost troostite tool steel and production method

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Embodiment Construction

[0063] The present invention is described in more detail through examples, and these examples are only descriptions of the best implementation modes of the present invention, and do not limit the scope of the present invention in any way.

[0064] The chemical composition in the steel of the embodiment is shown in Table 1; the production process of hot-rolled strip steel is shown in Table 2 and Table 3; the electroplating process is shown in Table 4; and the performance of the finished product is shown in Table 5.

[0065] Table 1 embodiment chemical composition, %

[0066] Numbering C Si mn P S Mg Ca Ba B N C / N Ca / Ba Ca / Mg Ca / S 1 0.45 0.02 0.9 0.015 0.015 0.01 0.05 0.65 0.0004 0.041 10.976 0.077 5.000 3.333 2 0.49 0.01 1.42 0.004 0.009 0.02 0.022 0.38 0.0006 0.022 22.273 0.058 1.100 2.444 3 0.48 0.007 0.91 0.008 0.002 0.005 0.01 0.09 0.0005 0.29 1.655 0.111 2.000 5.000 4 0.5 0.005 0.6...

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PUM

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Abstract

The invention provides 1200MPa heat-treatment-free low-cost troostite tool steel and a production method. The steel comprises the following chemical components in percentage by weight: 0.40-0.60% of C, less than or equal to 0.1% of Si, 0.4-1.5% of Mn, 0.0005-0.05% of Ca, 0.0005-0.05% of Mg, 0.001-0.5% of Re, greater than or equal to 0.05% of Ca/Re, greater than or equal to 0.5% of Ca/S, greater than or equal to 1% of Ca/Mg, greater than or equal to 0.005% of N, less than or equal to 100% of C/N, less than or equal to 0.0008% of B, less than or equal to 0.020% of P, less than or equal to 0.015% of S and the balance Fe and inevitable impurities. The tool steel produced by the production method provided by the invention does not need heat treatment, has hardness of 37HRC or above, is excellent in wear resistance and low in cost, has a smooth surface, and is free of an oxidized decarburized layer; and after a sand blasting process is omitted, the electroplating qualification rate is 100%, and the service life is obviously prolonged.

Description

technical field [0001] The invention relates to the field of steel material preparation, in particular to a low-cost troostite tool steel without heat treatment and a production method thereof. Background technique [0002] At present, ordinary tools on the market are all processed by heat treatment of medium carbon steel, and the hardness after quenching and tempering is generally required to be above 37HRC. However, the heat treatment process is complicated, the quenching heating consumes a lot of energy, the cost is high, the oil fume is large, and it is not environmentally friendly. For example, the conventional processing procedures for strap buckles or gardening tools are: smelting - hot rolling - annealing - stamping - heat treatment - surface grinding - sanding - rolling - electroplating - assembly. The hot-rolled coil needs to be annealed and flattened before stamping, and quenched and tempered after stamping to increase the hardness. The cost of two heat treatment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/02C21C7/06C21C7/00C21D8/02C21D1/74B22D11/115B22D11/12C25D3/56C25D7/06
CPCC22C38/04C22C38/02C22C38/002C22C38/001C21C7/06C21C7/0006C21D8/0226C21D8/0247C21D1/74B22D11/115B22D11/1206C25D3/56C25D7/0614
Inventor 杨玉王英海刘志伟张瑞琦郭晓宏赵宝纯李庆贤
Owner ANGANG STEEL CO LTD
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