Stainless steel for cutter and manufacture method thereof

A technology of stainless steel and knives, which is applied in the field of stainless steel manufacturing, can solve the problems of easy chipping of knives, high production cost, complicated process, etc., and achieve the effects of easy control of product quality, simple production operation, and excellent process performance

Inactive Publication Date: 2010-02-10

WUHAN IRON & STEEL (GROUP) CORP

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AI-Extracted Technical Summary

Problems solved by technology

[0004] Among the above technologies, the former literature records that the copper alloy material is based on copper, the production cost is high, and the thermal processing performance is poor. It needs to be manufactured by powder metallurgy method, which has complicated process and low production efficiency.

The stainless steel materials introduced in the latter literature are added with a mass fraction of more than 0.7% C in order to increase the hardness, but practice has proved that adding more than 0.7% C content in stainless steel will become a...

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Abstract

The invention discloses stainless steel for a cutter and a manufacture method thereof. The steel comprises the following chemical components in percentage by weight: C:0.20-0.65, Si:0.10-0.50, Mn:0.10-0.60, P:0.010-0.030, S: 0.005-0.015, Cr: 14-17, Nb: 0.01-0.30, Ti: 0.005-0.025, W: 0.50-1.50, Al: 0.005-0.30 and the balance of Fe and inevitable impurities and also satisfies that the valent weightof Cr is 14.14-17.41, and the valent weight of Ni is 6.30-19.63. The manufacture method comprises the following steps: making steel in an induction furnace, casting ingot moulds, rolling in a reversing mill, cooling in a pile, thermally treating, and the like. A cutter made of the steel does not disintegrate, keeps durable sharpness and is suitable for manufacturing a kitchen cutter, scissors anda surgical knife. The manufacture method has excellent performance, simple production operation, easily controlled product quality and low cost.

Application Domain

Temperature control deviceElectric furnace

Technology Topic

Surgical knifeInduction furnace +3

Examples

Experimental program(1)
Effect test(1)

Example Embodiment

[0024] The stainless steel for cutting tools and the manufacturing method thereof of the present invention will be further described in detail below in conjunction with specific embodiments:

[0025] The chemical compositions of the 12 specific examples of the stainless steel for cutting tools of the present invention are listed in Table 1 in sequence. The manufacturing methods of these 12 kinds of stainless steel for knives are as follows:

[0026] 1) Induction furnace steelmaking: use soft iron as the main raw material for batching, use waste carbon electrodes as recarburizers, and slag material with CaO as the main material. The refining time is controlled at 15-30min, and the tapping temperature is controlled at 1530-1580℃. , Add titanium wire 5-7min before tapping;

[0027] 2) Casting of steel ingot mold: After the steel is finished, it will be calmed for 3-8 minutes and start pouring, with a trickle bottom. After the molten steel is filled with the bottom of the mold, increase the injection speed to keep the molten steel rising steadily, and change to a trickle at the riser. Filling; immediately add heating agent to carbonize rice husk after casting;

[0028] 3) Rolling and stack cooling: adopts reversible rolling mill to and fro reversible rolling, the start rolling temperature is controlled at 1100℃~1250℃, the final rolling temperature is controlled at 800~850℃, water spraying is strictly prohibited during the rolling process, and stack cooling after rolling;

[0029] 4) Heat treatment: during annealing pretreatment, the temperature is controlled at 600~800℃ for heating and insulation, and the furnace is cooled to room temperature; during quenching, the temperature is controlled at 950~1160℃ for heating and insulation, and the furnace is air cooled; during tempering, the temperature is controlled at 150~250℃ for heating Insulation, air cooling out of the furnace, the finished product is obtained.

[0030] Table 1 Chemical composition (Wt, %) in the stainless steel for cutting tools of Examples 1-12

[0031] Real

[0032]

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

High hardness
Good sharpness

Press-Fit Terminal, a Method for Manufacturing the Same, and a Structure of Connection Between a Press-Fit Terminal and a Circuit Board

InactiveUS20080188100A1High hardnessIncrease contact areaContact member manufacturingCoupling contact membersElectroplatingMetal

Owner:AUTONETWORKS TECH LTD +2

Waterborne two-component woodware coating and preparation method thereof

ActiveCN106221541AHigh hardnessGood chemical resistancePolyurea/polyurethane coatingsWaxSolvent

Owner:BEIJING BUILDING MATERIALS ACADEMY OF SCI RES

Stainless steel for cutter and manufacture method thereof

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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