High-carbon martensitic stainless steel and a production method therefor

A manufacturing method and technology of stainless steel, applied in the field of high-carbon martensitic stainless steel, can solve the problems of coarse primary carbides and serious segregation, and achieve the effect of reducing the size

Inactive Publication Date: 2012-09-12
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In particular, in the ingot casting method commonly used in the manufacture of razor steel materials, segregation occurs more severely, so there is a disadvantage that the formed primary carbides are relatively coarse.

Method used

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  • High-carbon martensitic stainless steel and a production method therefor
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  • High-carbon martensitic stainless steel and a production method therefor

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Embodiment Construction

[0035] Hereinafter, embodiments of the present invention and other necessary items will be described in detail with reference to the drawings so that those skilled in the art can easily understand the content of the present invention. However, the present invention can be implemented in various forms without departing from the scope of protection required by the claims, and therefore, the embodiments described below are illustrative regardless of whether they are expressed or not.

[0036] When describing the present invention, when it is considered that a specific description of a related known function or configuration may obscure the gist of the present invention, the detailed description will be omitted. In addition, it should be noted that in the drawings, the same components are denoted by the same reference numerals and signs as much as possible even though they are shown in different drawings. Furthermore, the thickness or size of each layer in the drawings may be exag...

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Abstract

The present invention relates to a production method for high-carbon martensitic stainless steel as used in razor blades, knives and the like, which contains from 0.40 to 0.80 wt.% of carbon and from 11 to 16 wt.% of chromium as the main components. Provided is a production method for high-carbon martensitic stainless steel in a strip-casting device, wherein steel for stainless steel containing, as percentages by weight, from 0.40 to 0.80% of carbon and from 11 to 16% of chromium is supplied from a tundish, via a nozzle to a molten steel pool in such a way that a stainless-steel thin sheet is cast, and the cast stainless-steel thin sheet is made into hot-rolled annealed strips using in-line rollers to a rolling reduction of from 5 to 40% immediately after casting such that the primary carbides within the hot-rolled annealed strip microstructure are no more than 10 [mu]m,; and also provided is martensitic stainless steel produced by means of the production method. By reducing the size of the primary carbides formed in the cast structure and the hot-rolled sheet to no more than 10 [mu]m, the present invention produces high-carbon martensitic stainless steel having outstanding blade-end quality for use in cutting implements.

Description

technical field [0001] The present invention relates to high-carbon martensitic stainless steel and manufacturing method thereof, particularly relate to utilize strip casting (strip casting) process to manufacture the high-carbon martensitic stainless steel that contains 0.4~0.8% carbon, 11~16% chromium, thereby shrink Primary carbide size high carbon martensitic stainless steel and method of manufacture thereof. Background technique [0002] Generally, high-carbon martensitic steel containing more than 0.40% (weight percent) of carbon is excellent in corrosion resistance, hardness, and wear resistance, so this high-carbon martensitic steel is used in razor blades, knives, etc. austenitic steel. Thus, when a razor blade is manufactured from high-carbon martensitic stainless steel used in razor blades and the like, the razor blade will come into contact with moisture during shaving. [0003] Also, such razor blades will be kept in a humid atmosphere and therefore need to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/06B22D11/12
CPCB22D11/002B22D11/0622B22D11/0697C22C38/18C22C38/40B22D11/06B22D11/12
Inventor 蔡东澈徐辅晟安承培郑成仁李哉和曹圭珍
Owner POHANG IRON & STEEL CO LTD
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