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Sulphur and copper-containing free-cutting stainless steel and preparation method thereof

A stainless steel, easy-cutting technology, applied in the direction of improving process efficiency, etc., can solve the problems of different structures and uses, and achieve the effects of dense structure, stable sulfur content control, and reduced production costs

Inactive Publication Date: 2009-04-01
BAOSTEEL SPECIAL STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The difference is that the structure is different and the application is also different, and the strength and corrosion resistance are not as good as the present invention

Method used

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  • Sulphur and copper-containing free-cutting stainless steel and preparation method thereof

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Embodiment Construction

[0051] The present invention will be further described below in conjunction with the examples, and those skilled in the art should understand that the examples are only for illustration and do not constitute any limitation to the present invention.

[0052] A steel company has successfully smelted sulfur-containing copper-containing free-cutting stainless steel BT303CuS2 by using this patented invention. The complete technical plan is as follows:

[0053] 1. The smelting process steps are:

[0054] 1) The first step is to use a certain voltage and current to melt scrap steel through an ultra-high power electric arc furnace (slot pitch furnace lining). After the second basket is energized and melted, the second basket is melted > 80% and then oxygen is blown to boost the melting. Oxygen consumption 205m 3 , before tapping, add 200kg of SiFe for reduction, and pull slag fully, control the amount of slag ≤ 500kg, and control the tapping temperature at 1650°C. The composition c...

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Abstract

The invention provides an austenitic free cutting stainless steel with excellent cutting property and strength, and according to weight percentage, the chemical compositions in the stainless steel are designed as follows: no more than 0.05 percent of C, 0.05 to1.0 percent of Si, 2.0 to 3.0 percent of Mn, no more than 0.060 percent of P, 0.24 to 0.30 percent of S, 2.0 to 2.5 percent of Cu, 8.0 to 10.0 percent of Ni, 17.0 to 19.0 percent of Cr, no more than 0.6 percent of Mo, no more than 0.040 percent of N, Fe, and inevitable impurities as the rest.

Description

technical field [0001] The invention relates to an alloy steel smelting process in the iron and steel industry, in particular to a production process of sulfur-containing and copper-containing free-cutting stainless steel 303CuS2. Background technique [0002] The so-called free-cutting stainless steel refers to stainless steel with excellent cutting performance. The main way to improve the free-cutting performance of steel is to add free-cutting elements (S, P, Pb, Se, Te, Bi, Zr, Re et al). Generally, the superiority of free-cutting steel cutting performance is evaluated by several comprehensive indicators such as tool life, machined surface finish, chip handling, tool force and energy consumption. [0003] With the development of the stainless steel market, it is necessary to further improve the processing performance of the material, and the current stainless steel varieties cannot meet the requirements of cutting performance. [0004] Environmentally friendly free-cut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/42C22C38/58C22C33/04C21C7/068C21C7/064C21C7/072C21D1/00
CPCY02P10/20
Inventor 廖俊罗晓青杨金明刘军占徐松乾臧震
Owner BAOSTEEL SPECIAL STEEL CO LTD