KR20190042119A - Gloss treatment method of the surface of stainless hot forging products - Google Patents

Gloss treatment method of the surface of stainless hot forging products Download PDF

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KR20190042119A
KR20190042119A KR1020170133029A KR20170133029A KR20190042119A KR 20190042119 A KR20190042119 A KR 20190042119A KR 1020170133029 A KR1020170133029 A KR 1020170133029A KR 20170133029 A KR20170133029 A KR 20170133029A KR 20190042119 A KR20190042119 A KR 20190042119A
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South Korea
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hot forging
hot
solution
minutes
acid
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KR1020170133029A
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Korean (ko)
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김종백
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김종백
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J1/00Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/08Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for polishing surfaces, e.g. smoothing a surface by making use of liquid-borne abrasives
    • B24C1/086Descaling; Removing coating films
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08Iron or steel
    • C23G1/085Iron or steel solutions containing HNO3
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23GCLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08Iron or steel
    • C23G1/086Iron or steel solutions containing HF

Abstract

The present invention relates to a method for performing a gloss treatment on a surface of a stainless hot-forged product, which is capable of putting gloss on the surface for improving quality of the hot-forged product made from stainless steel. According to the present invention, the method for performing a gloss treatment on the surface of a stainless hot-forged product comprises: a step of first shot blast for removing oxidation scale by a shot blast on a surface of the hot-forged product; a step of first acid treatment for soaking the hot-forged product in a first cleaning solution made of a mixture of diluted nitric acid solution and diluted hydrofluoric acid solution; a step of second shot blast for applying a shot blast to the surface of a hot-forged product which has passed through the step of first acid treatment; a step of a second acid treatment for soaking the hot-forged product, which has passed through the step of a second shot blast in a second cleaning solution made of a mixture of diluted nitric acid solution and diluted fluoric acid solution; a step of washing at a high temperature for putting the hot-forged product, which has passed through the step of a second acid treatment, in a water tank filled with hot water; a step of washing at a low temperature for putting the hot-forged product, which has passed through the step of washing at a high temperature, in a water tank filled with cold water; and a step of spraying at a high pressure for removing moisture remaining on the surface of the hot-forged product, which has passed through the step of washing at a low temperature, by using high-pressure air.

Description

스테인레스 열간단조품의 표면 유광처리방법{Gloss treatment method of the surface of stainless hot forging products}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stainless steel hot forging product,

본 발명은 스테인레스로 제조되는 열간단조품의 품질 향상을 위해 표면에 광을 낼 수 있도록 하는 유광처리기술에 관한 것이다.The present invention relates to a luminescent treatment technique for allowing light to be emitted to a surface for improving the quality of a hot forging product made of stainless steel.

금속으로 제조되는 제품들은 표면처리가 필수적으로 이루어지며, 표면처리를 통해 표면조도를 향상시켜 장식미를 부여하고자 하거나, 내식성을 높이기 위한 경우가 대부분이다.Products made of metal are required to be surface-treated, and most of them are intended to enhance the surface roughness by imparting a decorative effect or to increase corrosion resistance through surface treatment.

특히, 내식성을 높이도록 하는 것은 제품의 수명을 연장하는 효과를 갖는 것인 바, 상당히 중요하게 인식되고 있다.Particularly, increasing the corrosion resistance has an effect of prolonging the life of the product, and thus it has been recognized to be extremely important.

스테인레스의 경우 일반 탄소강에 비해 내식성이 양호하지만 고유의 투박한 색상을 가지고 있다는 단점이 있다.Stainless steel has a better corrosion resistance than ordinary carbon steel, but has a disadvantage in that it has inherent ruggedness.

구체적으로 각종 가스 및 유체의 공급장치에 있어 관이음쇠를 통한 배관의 연결용 L형, T형의 피팅류는 초고도의 청정성과 우수한 내식성이 요구되는 배관으로서 오스테나이트 스테인레스를 주로 사용하고 있다.Specifically, austenitic stainless steel is mainly used as a piping for L-type and T-type fittings for connection of piping through pipe fittings in various gas and fluid supply devices, which requires ultra-high cleanliness and excellent corrosion resistance.

이러한 피팅류는 공기중에 표면이 노출된 상태로 사용되며, 이에 따라 산화가 진행되기 때문에 표면의 산화 예방을 늦추기 위한 표면 산처리를 실시하게 된다.These fittings are used in a state in which the surface of the fitting is exposed to the air. As the oxidation progresses, the surface acid treatment for slowing the oxidation of the surface is performed.

하지만, 단순한 표면 산처리를 하는 경우 제품의 표면에 광이 나지 않아 제품의 질을 떨어뜨리는 요인이 되고 있다.However, when a simple surface acid treatment is performed, the surface of the product is not exposed to light, which is a cause of deteriorating the quality of the product.

스테인레스 제품을 보다 미려하게 하고자 표면에 광이 나도록 하는 유광처리 기술로 알려진 것은 다음과 같다.Stainless steel products are known to be glare treatment technology which makes light on the surface to be more beautiful.

기존의 스테인레스 유광처리 기술은 규사토로 표면을 깍아내는 방법과 유사한 방법인데, 연마재에 기름을 섞어서 문질러 주는 방법이고, 주로 큰 제품에 적용되고 깨끗한 표면을 만들수 있지만 시간과 비용이 많이 들어 경제성이 극히 낮다는 문제점이 있다.Conventional stainless steel luster treatment method is similar to the method of scraping the surface of silica sand. It is a method of rubbing and rubbing the abrasive with oil. It is mainly applied to big products and can make a clean surface, but it is very economical because of its time and cost. There is a problem.

이때 사용되는 연마재는 보통 산화크롬(Cr2O3), 미세규조토(SiO2), 산화철(Fe2O3) 등이다.The abrasive used here is usually chromium oxide (Cr 2 O 3), micro-diatomaceous earth (SiO 2), iron oxide (Fe 2 O 3), and the like.

본 발명과 관련한 종래기술로 대한민국 등록특허 제10-0622775호의 "오스테나이트 스테인레스강 내식성을 향상시키는 표면처리방법 및 제조품"이 있으며, 또 다른 종래기술로 대한민국 등록특허 제10-0321619호의 "스테인레스 냉연산세강판의 부동태 처리방법"이 있다.There is a surface treatment method and an article of manufacture for improving the corrosion resistance of austenitic stainless steel of Korean Registered Patent No. 10-0622775 according to the prior art related to the present invention. In another prior art, Korean Patent No. 10-0321619 entitled " Stainless Steel Cold- A passive method of steel plate ".

두 종래기술 모두 스테인레스 제품의 내식성을 향상시킬 수 있도록 하는 방안을 제시하는 것이며, 유광처리를 위한 기술적 해결 방안을 제시하지 못하고 있다.Both of these prior art techniques suggest a way to improve the corrosion resistance of stainless steel products and do not provide a technical solution for polish treatment.

따라서 스테인레스를 이용하여 열간단조 등의 방법을 통해 각종 피팅류를 제조할 때 제품의 품질을 높여 경쟁력을 확보하기 위해서는 저렴한 비용으로 제품 표면에 광이 나도록 하는 유광처리 기술이 절실히 요구된다.Therefore, when various fittings are manufactured using stainless steel using hot forging or the like, it is strongly required to provide a luster treatment technology that can lighten the surface of the product at low cost in order to enhance the quality of the product and ensure competitiveness.

대한민국 등록특허 제10-0622775호Korean Patent No. 10-0622775 대한민국 등록특허 제10-0321619호Korean Patent No. 10-0321619

따라서 본 발명에서는 스테인레스로 제조되는 제품들의 표면에 효과적으로 광을 낼 수 있도록 하는 스테인레스 유광처리방법을 제시하고자 한다.Accordingly, the present invention proposes a stainless steel luminescent treatment method for effectively emitting light on the surface of products made of stainless steel.

그리고 본 발명은 이러한 유광처리를 통해 고품질의 스테인레스 제품을 제공할 수 있도록 하는 기반을 마련하고자 한다.The present invention aims to provide a base for providing a high-quality stainless steel product through such luster treatment.

제시한 바와 같은 과제 달성을 위한 본 발명의 스테인레스 열간단조품의 표면 유광처리방법은, 상기 열간단조품의 표면에 대해 숏블라스트로 산화스케일을 제거하도록 하는 1차 숏블라스트 단계; 질산희석액과 불산희석액의 혼합물로 이루어지는 1차세척액에 상기 열간단조품을 침지하도록 하는 1차 산처리 단계; 상기 1차 산처리 단계를 거친 상기 열간단조품 표면에 대해 숏블라스트를 적용하는 2차 숏블라스트 단계; 상기 2차 숏블라스트 단계를 거친 상기 열간단조품을 질산희석액과 불산희석액의 혼합물로 이루어지는 2차세척액에 침지하도록 하는 2차 산처리 단계; 상기 2차 산처리 단계를 거친 상기 열간단조품을 뜨거운 물이 담긴 수조에 넣도록 하는 고온 수세단계; 상기 고온 수세단계를 거친 상기 열간단조품을 차가운 물이 담긴 수조에 넣도록 하는 저온 수세단계; 상기 저온 수세단계를 거친 상기 열간단조품을 고압의 에어를 이용하여 표면에 잔존하는 수분을 제거하도록 하는 고압분사단계;를 포함하는 것을 특징으로 한다.According to an aspect of the present invention, there is provided a method of treating a surface of a stainless steel hot forging, comprising: a first shot blasting step of removing an oxide scale by a shot blast on a surface of the hot forging; A primary acid treatment step in which the hot forging is immersed in a primary washing solution comprising a mixture of a dilute nitric acid solution and a dilute hydrofluoric acid; A second shot blasting step of applying a shot blast to the surface of the hot forging product that has undergone the primary acid treatment step; A second acid treatment step of immersing the hot forging product that has undergone the second shot blasting step in a secondary washing solution comprising a mixture of a nitric dilution solution and a hydrofluoric acid dilution solution; A hot water washing step of bringing the hot forging product that has undergone the secondary acid treatment step into a water tank containing hot water; A low-temperature water washing step of placing the hot forging product subjected to the high-temperature water washing step into a water tank containing cold water; And a high-pressure spraying step of spraying the hot forging, which has been subjected to the low-temperature water washing step, to remove water remaining on the surface by using high-pressure air.

바람직하게 상기 1차세척액을 이루는 상기 질산희석액과 상기 불산희석액은 그 농도가 6 ~ 10%, 혼합비율은 일대일이며, 상기 2차세척액을 이루는 질산희석액과 불산희석액의 농도는 6 ~ 10%, 혼합비율은 3:1인 것을 특징으로 한다.Preferably, the concentration of the nitric acid dilution solution and the hydrofluoric acid dilution solution constituting the primary washing solution is 6 to 10% and the mixing ratio is one to one. The concentration of the nitric acid dilution solution and the hydrofluoric acid dilution solution constituting the secondary washing solution is 6 to 10% The ratio is 3: 1.

바람직하게 상기 1차 산처리 단계를 통해 상기 열간단조품 표면에 대한 부동태처리를 하고자 하는 경우 상기 1차세척액을 이루는 질산희석액의 농도는 35%로 하고, 상기 불산희석액의 농도는 6 ~ 10%로 하는 것을 특징으로 한다.Preferably, when passivation treatment is to be performed on the surface of the hot forging through the primary acid treatment step, the concentration of the nitric acid diluting solution constituting the primary washing solution is set to 35%, and the concentration of the hydrofluoric acid diluting solution is set to 6 to 10% .

바람직하게 상기 2차 숏블라스트 단계는, 쇼트볼의 직경이 0.4mm 이하인 것을 사용하여 20 ~ 30분 동안 처리하도록 하는 것을 특징으로 한다.Preferably, the second shot blasting step is performed for 20 to 30 minutes using a shot ball having a diameter of 0.4 mm or less.

바람직하게 상기 1차 산처리 단계는 45분에서 60분 동안 처리하고, 상기 2차 산처리 단계는 30분에서 40분 동안 처리하도록 하는 것을 특징으로 한다.Preferably, the primary acid treatment step is for 45 minutes to 60 minutes, and the secondary acid treatment step is for 30 minutes to 40 minutes.

바람직하게 상기 고온 수세단계는 5분 동안 처리하며, 상기 저온 수세단계는 10분 동안 처리하도록 하는 것을 특징으로 한다.Preferably, the high temperature water washing step is performed for 5 minutes, and the low temperature water washing step is performed for 10 minutes.

본 발명에 의한 스테인레스 열간단조품의 표면 유광처리방법에 의하면 스테인레스 열간단조품의 표면에 광이 나도록 처리함에 따라 제품의 품질을 높일 수 있다는 효과가 있다.According to the surface gloss processing method of a stainless hot forging product according to the present invention, the surface of a stainless hot forging product is treated so as to emit light, thereby improving the quality of the product.

또한, 본 발명에 의하면 제품의 외관을 미려하도록 함으로써 사용자들의 만족도를 높여줄 수 있다는 효과도 있다.In addition, according to the present invention, it is possible to enhance the satisfaction of users by making the appearance of the product look good.

도 1은 본 발명에 의한 스테인레스 열간단조품의 표면 유광처리방법에 대한 작업 공정도.
도 2는 열간단조로 제조된 유광처리 전 피팅품의 사진.
도 3은 열간단조 피팅품을 본 발명에 의한 유광처리방법으로 처리한 후의 사진.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a working process of a method for treating a surface of a stainless steel hot forging according to the present invention. Fig.
FIG. 2 is a photograph of a fitting before heat treatment made by hot forging; FIG.
FIG. 3 is a photograph of the hot forged fitting after being treated by the gloss-treating method according to the present invention.

이하 본 발명에 의한 스테인레스 열간단조품의 표면 유광처리방법에 대해 보다 상세한 설명을 하도록 하며, 첨부되는 도면을 참조하는 것으로 한다. 단, 제시되는 도면 및 이에 대한 구체적인 설명은 본 발명의 기술적 사상에 따른 하나의 실시 가능한 예를 설명하는 것인 바, 본 발명의 기술적 보호범위가 이에 한정되는 것은 아니다.Hereinafter, a method of treating a surface of a stainless steel hot forging product according to the present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the drawings and detailed description thereof illustrate one feasible example according to the technical idea of the present invention, and the technical scope of protection of the present invention is not limited thereto.

도 1은 본 발명에 의한 스테인레스 열간단조품의 표면 유광처리방법에 대한 작업 공정도이며, 도 2는 열간단조로 제조된 유광처리 전 피팅품의 사진이며, 도 3은 열간단조 피팅품을 본 발명에 의한 유광처리방법으로 처리한 후의 사진을 나타낸 것이다.FIG. 1 is a view showing a work process of a stainless steel hot forging process according to the present invention, FIG. 2 is a photograph of a fitting product before a lusterless process manufactured by hot forging, FIG. 3 is a photograph of a hot forged fitting, The photographs after treatment by the treatment method are shown.

도시된 바와 같이 본 발명에 의한 스테인레스 열간단조품의 표면 유광처리방법은 스테인레스 소재를 이용하여 열간단조로 각종 피팅류를 제작할 때 활용되는 기술이다.As shown in the figure, the surface polished surface treatment method of stainless steel hot forging according to the present invention is a technique used for manufacturing various fittings by hot forging using a stainless steel material.

본 발명은 1차 숏블라스트 단계(S10), 1차 산처리 단계(S20), 2차 숏블라스트 단계(S30), 2차 산처리 단계(S40), 고온 수세단계(S50), 저온 수세단계(S60) 및 고압분사단계(S70)를 포함하여 이루어질 수 있다.The present invention is characterized in that the present invention is characterized in that it comprises a first shot blast step S10, a first acid treatment step S20, a second shot blast step S30, a second acid treatment step S40, a hot water wash step S50, S60) and a high-pressure injection step (S70).

스테인레스 소재를 이용하여 소정 형상의 피팅품을 열간단조로 제작하도록 하며, 열간단조품에 버어(BURR)가 많이 존재하는 경우에는 먼저 버어를 제거시키도록 한다.The fittings of a predetermined shape are formed by hot forging using stainless steel. If there are many burrs in the hot forging, the burrs are removed first.

열간단조품의 표면의 버어(burr)를 제거하기 위해 그라인더를 이용할 수 있다.A grinder can be used to remove burrs on the surface of the hot forging.

1차 숏블라스트 단계(S10)에서는 쇼트볼을 이용하여 열간단조품 표면 전체에 걸쳐 존재하는 산화스케일을 제거하도록 한다.In the first shot blasting step (S10), a shot ball is used to remove the oxide scale existing over the entire surface of the hot forging product.

그 다음으로 1차 산처리 단계(S20)가 이어지는데, 1차세척액을 이용하여 열간단조품에 대해 산처리를 하도록 한다. 여기서 1차세척액은 질산희석액과 불산희석액의 혼합물로 이루어지는 것이며, 열간단조품을 1차세척액에 침지시켜서 소정 시간 동안 두도록 한다.Next, the primary acid treatment step (S20) is continued, and the acid treatment is performed on the hot forging product using the primary cleaning solution. The primary cleaning solution is a mixture of a dilute nitric acid solution and a diluted hydrofluoric acid solution. The hot forging product is immersed in the primary cleaning solution for a predetermined time.

바람직하게 1차세척액을 이루는 질산희석액과 불산희석액은 각 농도가 6 ~ 10% 범위에 있는 것을 사용하도록 하며, 혼합되는 양은 질산희석액과 불산희석액이 일대일(1:1)이 되도록 한다.Preferably, the diluted nitric acid solution and the hydrofluoric acid diluted solution constituting the primary washing solution are each in the range of 6 to 10%, and the mixed amount is one to one (1: 1) between the diluted nitric acid solution and the dilute hydrochloric acid solution.

한편, 경우에 따라서 1차세척액을 이루는 질산희석액의 농도는 35%인 것을 사용할 수도 있는데, 이와 같은 경우는 열간단조품에 대해 부동태처리가 필요한 경우에 적용될 수 있다. 불산희석액의 농도는 6 ~10%인 것을 사용하면 되고, 혼합양의 비율은 일대일(1:1)로 한다.On the other hand, in some cases, the concentration of the dilute nitric acid solution constituting the primary cleaning solution may be 35%. This case can be applied to the case where the passive treatment is required for the hot forging product. The concentration of the hydrofluoric acid diluent may be 6 to 10%, and the ratio of the mixing amount may be one to one (1: 1).

1차 산처리 단계(S20) 후에 2차 숏블라스트 단계(S30)가 수행되며, 1차세척액에 침지되었던 열간단조품을 꺼내어 열간단조품 표면에 대해 숏블라스트를 적용한다.After the primary acid treatment step (S20), a second shot blast step (S30) is performed, and the hot forged product immersed in the primary cleaning solution is taken out and a shot blast is applied to the surface of the hot forged product.

2차 숏블라스트 단계(S30)에서는 쇼트볼을 이용하여 표면처리를 하게 되는데, 바람직하게 1차 숏블라스트 단계(S10)에서 보다 작은 직경의 쇼트볼을 이용하여 블라스팅을 하도록 한다.In the second shot blasting step (S30), surface treatment is performed using a shot ball. Preferably, in the first shot blasting step (S10), blasting is performed using a shot ball having a smaller diameter.

2차 숏블라스트 단계(S30)에서 사용되는 쇼트볼의 직경은 0.4mm 이하인 것을 사용하도록 하는 것이 좋으며, 블라스트기에서 20 ~ 30분 동안 처리하도록 한다.The diameter of the shot ball used in the second shot blasting step (S30) is preferably 0.4 mm or less, and is treated for 20 to 30 minutes in the blast machine.

2차 숏블라스트 단계(S30) 다음으로 2차 산처리 단계(S40)가 이어지며, 2차 숏블라스트 단계(S30)를 거친 열간단조품을 2차세척액에 침지시켜서 산처리가 이루어지도록 한다.Second shot blasting step (S30) Next, a secondary acid treatment step (S40) is continued, and the hot forging product that has undergone the second shot blasting step (S30) is immersed in the secondary washing solution to perform the acid treatment.

여기서 2차세척액은 질산희석액과 불산희석액의 혼합물로 이루어지는데, 질산희석액과 불산희석액의 각 농도는 6 ~ 10% 인 것으로 하되, 혼합되는 양의 비율은 질산희석액(3) : 불산희석액(1)의 비율로 이루어지도록 하는 것이 바람직하다.The concentration of the nitric acid dilution solution and the hydrofluoric acid dilution solution is 6 to 10%, and the ratio of the mixed amount of the nitric acid dilution solution and the hydrofluoric acid dilution solution is 3: Of the total amount of the catalyst.

한편, 1차 산처리 단계(S20)의 경우 45분에서 60분 동안 처리하도록 함이 바람직하며, 2차 산처리 단계(S40)에서는 30분에서 40분 동안 처리하도록 한다.On the other hand, in the case of the primary acid treatment step (S20), the treatment is preferably performed for 45 minutes to 60 minutes. In the secondary acid treatment step (S40), the treatment is performed for 30 minutes to 40 minutes.

2차 산처리 단계(S40)를 거친 열간단조품을 꺼낸 후에는 고온 수세단계(S50)가 수행된다. 고온 수세단계(S50)에서는 소정온도의 뜨거운 물이 담긴 수조에 열간단조품을 투입하여 산성의 세척액을 제거하도록 한다.After taking out the hot forging product through the secondary acid treatment step S40, the hot water washing step S50 is performed. In the hot water washing step (S50), hot forging is put into a water tank containing hot water at a predetermined temperature to remove the acidic washing solution.

바람직하기로 고온 수세단계(S50)에서 뜨거운 물의 온도는 대략 60 ~ 80℃ 정도가 적합하고, 처리 시간은 5분 동안 처리하도록 한다.Preferably, in the hot water washing step (S50), the temperature of the hot water is about 60 to 80 DEG C, and the treating time is 5 minutes.

고온 수세단계(S50) 다음에는 저온 수세단계(S60)가 실시된다.After the high temperature water washing step (S50), the low temperature water washing step (S60) is performed.

저온 수세단계(S60)에서는 고온 수세단계(S50)를 거친 열간단조품을 차가운 물이 담긴 수조에 넣어서 처리하는 것으로 저온 수세단계(S60)에서 사용되는 차가운 물의 온도는 대략 20~25℃ 정도가 적합하고 처리 시간은 10분 동안 처리하는 것으로 한다.In the low-temperature water washing step (S60), the hot forging product subjected to the high-temperature water washing step (S50) is put into a water tank containing cold water, and the temperature of the cold water used in the low temperature water washing step (S60) The treatment time shall be 10 minutes.

저온 수세단계(S60) 다음에는 마지막으로 고압분사단계(S70)가 뒤따른다.The low-temperature water washing step (S60) is followed by a high-pressure jetting step (S70).

고압분사단계(S70)에서는 고압의 에어를 이용하여 열간단조품 표면에 잔존하는 수분을 신속하게 제거되도록 하는 작업을 의미한다.In the high-pressure injection step (S70), it means an operation of rapidly removing water remaining on the surface of the hot forging using air of high pressure.

보다 구체적인 실시예에 대해 설명하도록 한다.A more specific embodiment will be described.

도 2는 일반적인 스테인레스 열간단조품의 사진이며, 도 3은 본 발명의 유광처리방법을 거친 후의 열간단조품의 사진이다.FIG. 2 is a photograph of a general stainless hot forging product, and FIG. 3 is a photograph of a hot forging product after being subjected to the glossiness treatment method of the present invention.

도 3은 본 발명의 일 실시예의 조건에 따라 유광처리된 것이다.Fig. 3 is a glossiness-processed according to the conditions of an embodiment of the present invention.

1차 숏블라스트 단계(S10)를 거친 열간단조품은 1차 산처리 단계(S20)를 거치도록 하는데, 1차세척액으로 사용되는 질산희석액과 불산희석액의 각 농도는 동일하게 7%인 것을 사용하여 동일한 양만큼씩 혼합하도록 했다.The hot forging product subjected to the first shot blasting step (S10) is subjected to the first acid treatment step (S20). The concentrations of the diluted nitric acid solution and the diluted hydrofluoric acid used as the primary washing solution are 7% The amount was mixed by the amount.

준비된 1차세척액에 열간단조품을 투입하여 50분간 산처리가 이루어지게 했다.The hot forging was put into the prepared primary washing solution and acid treatment was performed for 50 minutes.

1차 산처리 단계(S20)를 마친 후에 열간단조품을 꺼내어 2차 숏블라스트 단계(S30)를 수행했는데, 2차 숏블라스트 단계(S30)에서 사용된 쇼트볼의 직경은 0.4mm 인 것으로 하여 실시했고, 20분간 처리하도록 했다.After the primary acid treatment step S20 is completed, the hot forged product is taken out and the second shot blast step S30 is performed. The diameter of the shot ball used in the second shot blast step S30 is 0.4 mm , For 20 minutes.

그 다음으로 2차 산처리 단계(S40)를 수행했으며, 2차세척액은 질산희석액과 불산희석액의 각 농도를 10%로 하여 혼합비율은 3:1이 되게 했다.Next, a secondary acid treatment step (S40) was carried out, and the concentration of the diluted nitric acid solution and the diluted hydrofluoric acid solution in the second washing solution was adjusted to 10% so that the mixing ratio became 3: 1.

2차 산처리 단계(S40)는 처리조에서 35분간 두어서 산처리가 이루지게 했다.In the secondary acid treatment step (S40), the acid treatment was performed by setting the treatment tank for 35 minutes.

2차 산처리 단계(S40) 후에 고온 수세단계(S50)로서 열간단조품을 온도 70℃의 물에 담궈서 5분 동안 두도록 하고, 그 다음으로 저온 수세단계(S60)로 온도 25℃의 물에 10분간 담궈 두도록 했다.After the secondary acid treatment step (S40), the hot forging product is immersed in water at a temperature of 70 DEG C for 5 minutes, and then in a low temperature water washing step (S60) for 10 minutes in water at 25 DEG C I had to soak it.

저온 수세단계(S60)를 거친 다음에는 고압분사단계(S70)로 고압 에어건을 이용하여 열간단조품 표면에 남아있는 수분을 신속하게 제거하도록 했다.After the low-temperature water washing step (S60), the high-pressure air gun is used to rapidly remove moisture remaining on the surface of the hot forging product in the high-pressure injection step (S70).

이상 설명한 바와 같은 일련의 과정을 통해 이루어지는 본 발명의 유광처리방법에 의하면 스테인레스 열간단조품의 표면 조도가 향상됨은 물론이고 광이 나는 유광처리 효과를 얻을 수 있다.According to the glossiness treatment method of the present invention which is performed through the above-described series of processes, not only the surface roughness of the stainless hot forging product is improved, but also the light-brilliant effect of light-treating can be obtained.

본 발명은 스테인레스 제품의 유광처리기술로 활용될 수 있다.The present invention can be utilized as a polishing process of a stainless steel product.

S10 : 1차 숏블라스트 단계
S20 : 1차 산처리 단계
S30 : 2차 숏블라스트 단계
S40 : 2차 산처리 단계
S50 : 고온 수세단계
S60 : 저온 수세단계
S70 : 고압분사단계
S10: First shot blast step
S20: Primary Acid Treatment Step
S30: Second shot blast step
S40: Secondary acid treatment step
S50: high temperature water washing step
S60: low temperature wash step
S70: High pressure injection step

Claims (6)

열간단조품의 표면 유광처리 기술로서,
상기 열간단조품의 표면에 대해 숏블라스트로 산화스케일을 제거하도록 하는 1차 숏블라스트 단계;
질산희석액과 불산희석액의 혼합물로 이루어지는 1차세척액에 상기 열간단조품을 침지하도록 하는 1차 산처리 단계;
상기 1차 산처리 단계를 거친 상기 열간단조품 표면에 대해 숏블라스트를 적용하는 2차 숏블라스트 단계;
상기 2차 숏블라스트 단계를 거친 상기 열간단조품을 질산희석액과 불산희석액의 혼합물로 이루어지는 2차세척액에 침지하도록 하는 2차 산처리 단계;
상기 2차 산처리 단계를 거친 상기 열간단조품을 뜨거운 물이 담긴 수조에 넣도록 하는 고온 수세단계;
상기 고온 수세단계를 거친 상기 열간단조품을 차가운 물이 담긴 수조에 넣도록 하는 저온 수세단계;
상기 저온 수세단계를 거친 상기 열간단조품을 고압의 에어를 이용하여 표면에 잔존하는 수분을 제거하도록 하는 고압분사단계;를 포함하는 것을 특징으로 하는 스테인레스 열간단조품의 표면 유광처리방법.
As a surface polish treatment technique of hot forging,
A first shot blasting step of removing an oxide scale by a shot blast with respect to the surface of the hot forging;
A primary acid treatment step in which the hot forging is immersed in a primary washing solution comprising a mixture of a dilute nitric acid solution and a dilute hydrofluoric acid;
A second shot blasting step of applying a shot blast to the surface of the hot forging product that has undergone the primary acid treatment step;
A second acid treatment step of immersing the hot forging product that has undergone the second shot blasting step in a secondary washing solution comprising a mixture of a nitric dilution solution and a hydrofluoric acid dilution solution;
A hot water washing step of bringing the hot forging product that has undergone the secondary acid treatment step into a water tank containing hot water;
A low-temperature water washing step of placing the hot forging product subjected to the high-temperature water washing step into a water tank containing cold water;
And a high-pressure spraying step of spraying the hot forging product, which has been subjected to the low-temperature water washing step, to remove moisture remaining on the surface of the hot forging product by using high-pressure air.
제 1 항에 있어서,
상기 1차세척액을 이루는 상기 질산희석액과 상기 불산희석액은 그 농도가 6 ~ 10%, 혼합비율은 일대일이며, 상기 2차세척액을 이루는 질산희석액과 불산희석액의 농도는 6 ~ 10%, 혼합비율은 3:1인 것을 특징으로 하는 스테인레스 열간단조품의 표면 유광처리방법.
The method according to claim 1,
The concentration of the nitric acid dilution solution and the hydrofluoric acid dilution solution constituting the first washing solution is 6 to 10% and the mixing ratio is one to one. The concentration of the diluted nitric acid solution and the hydrofluoric acid diluent is 6 to 10% 3: 1. ≪ / RTI >
제 1 항에 있어서,
상기 1차 산처리 단계를 통해 상기 열간단조품 표면에 대한 부동태처리를 하고자 하는 경우 상기 1차세척액을 이루는 질산희석액의 농도는 35%로 하고, 상기 불산희석액의 농도는 6 ~ 10%로 하는 것을 특징으로 하는 스테인레스 열간단조품의 표면 유광처리방법.
The method according to claim 1,
When the passive treatment is to be performed on the surface of the hot forging through the primary acid treatment step, the concentration of the nitric acid diluting solution constituting the primary washing solution is set to 35%, and the concentration of the hydrofluoric acid diluting solution is set to 6 to 10% Of the surface of the stainless steel hot forging product.
제 1 항 내지 제 3 항 중 어느 하나의 항에 있어서,
상기 2차 숏블라스트 단계는,
쇼트볼의 직경이 0.4mm 이하인 것을 사용하여 20 ~ 30분 동안 처리하도록 하는 것을 특징으로 하는 스테인레스 열간단조품의 표면 유광처리방법.
4. The method according to any one of claims 1 to 3,
In the second shot blasting step,
And the short ball having a diameter of 0.4 mm or less is used for 20 to 30 minutes to process the surface of the stainless steel hot forging.
제 1 항 내지 제 3 항 중 어느 하나의 항에 있어서,
상기 1차 산처리 단계는 45분에서 60분 동안 처리하고, 상기 2차 산처리 단계는 30분에서 40분 동안 처리하도록 하는 것을 특징으로 하는 스테인레스 열간단조품의 표면 유광처리방법.
4. The method according to any one of claims 1 to 3,
Wherein the primary acid treatment step is for 45 minutes to 60 minutes and the secondary acid treatment step is for 30 minutes to 40 minutes.
제 1 항 내지 제 3 항 중 어느 하나의 항에 있어서,
상기 고온 수세단계는 5분 동안 처리하며, 상기 저온 수세단계는 10분 동안 처리하도록 하는 것을 특징으로 하는 스테인레스 열간단조품의 표면 유광처리방법.


4. The method according to any one of claims 1 to 3,
Wherein the hot water washing step is performed for 5 minutes and the low temperature water washing step is performed for 10 minutes.


KR1020170133029A 2017-10-13 2017-10-13 Gloss treatment method of the surface of stainless hot forging products KR20190042119A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111823144A (en) * 2020-07-16 2020-10-27 杭州金固环保设备科技有限公司 Wet-type shot blasting system and method for cleaning surface oxide skin of rim
CN114438564A (en) * 2022-02-15 2022-05-06 江苏飞月轴瓦有限公司 Dehydrogenation treatment process for bearing bush machining
CN114700882A (en) * 2022-04-06 2022-07-05 攀钢集团研究院有限公司 Method for online removing oxide skin on inner surface and outer surface of seamless steel tube

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KR100321619B1 (en) 1997-12-24 2002-04-17 이구택 Passivation method of pickled stainless cold rolled steel sheet
KR100622775B1 (en) 2000-08-07 2006-09-13 에이티아이 프로퍼티즈, 인코퍼레이티드 Surface treatments to improve corrosion resistance of austenitic stainless steels

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KR100321619B1 (en) 1997-12-24 2002-04-17 이구택 Passivation method of pickled stainless cold rolled steel sheet
KR100622775B1 (en) 2000-08-07 2006-09-13 에이티아이 프로퍼티즈, 인코퍼레이티드 Surface treatments to improve corrosion resistance of austenitic stainless steels

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111823144A (en) * 2020-07-16 2020-10-27 杭州金固环保设备科技有限公司 Wet-type shot blasting system and method for cleaning surface oxide skin of rim
CN111823144B (en) * 2020-07-16 2022-05-03 杭州金固环保设备科技有限公司 Wet-type shot blasting system and method for cleaning surface oxide skin of rim
CN114438564A (en) * 2022-02-15 2022-05-06 江苏飞月轴瓦有限公司 Dehydrogenation treatment process for bearing bush machining
CN114438564B (en) * 2022-02-15 2024-03-29 江苏飞月轴瓦有限公司 Dehydrogenation treatment process for bearing bush machining
CN114700882A (en) * 2022-04-06 2022-07-05 攀钢集团研究院有限公司 Method for online removing oxide skin on inner surface and outer surface of seamless steel tube

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