KR880000095B1 - Method of a high hardness file - Google Patents

Method of a high hardness file Download PDF

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KR880000095B1
KR880000095B1 KR1019840004403A KR840004403A KR880000095B1 KR 880000095 B1 KR880000095 B1 KR 880000095B1 KR 1019840004403 A KR1019840004403 A KR 1019840004403A KR 840004403 A KR840004403 A KR 840004403A KR 880000095 B1 KR880000095 B1 KR 880000095B1
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oxide film
nitriding
weight
high hardness
activation
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KR1019840004403A
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KR860000913A (en
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고형선
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고종호
고종식
고형선
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING 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
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/40—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions
    • C23C8/42—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using liquids, e.g. salt baths, liquid suspensions only one element being applied
    • C23C8/48—Nitriding
    • C23C8/50—Nitriding of ferrous surfaces

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • Electroplating And Plating Baths Therefor (AREA)

Abstract

According to the invention, a press-formed primary file with HV250 or above of SUS-STS 304 is immersed in the bath solution of 150-240g NiCl and 50-150g HCl and applied with 5-15A/dm2 current for 30-90 sec. for activation of oxide film at room temperature and then is plated with Cr, Cd, Ni or Sn in about 1-10μm. The product is placed in the salt bath of NaCN, KCN, NaCNO or KCNo 80wt.% + NaCl 15-20wt.% + metal Titan powder 0.005-0.01 wt.% for 3-6 hrs. at 500-580≰C. The activation of the oxide film removes the obstracle to the nitriding, and Ti in the form of TiO in the salt bath acts as catalyst for nitriding.

Description

고경도(高硬度)줄의 제조방법Manufacturing method of high hardness string

본 발명은 스테인레스 강재를 이용하여 고경도, 줄, 톱줄 또는 조줄을 얻을 수 있도도록한 고경도 줄의 제조방법에 관한 것이다.The present invention relates to a method for producing a high hardness string to obtain a high hardness, file, saw file or coarse file using a stainless steel.

종래의 톱줄, 조줄 등과 같은 줄들은 KS1, 2종의 탄소 공구강이나 SKC 8종의 절삭 공구용 강재를 소재로서 이용하였으나 완성된 줄의 경도가 HV960 정도 밖에 얻을 수 없었기 때문에 고급합금 강으로된 특수 금형등 고경도의 가공물을 절삭하는 경우 줄날이 쉽게 마멸되어 줄의 소모가 많아지고 작업시간이 오래 걸리며, 작업이 번거로워지는 점등 작업의 능률을 저하시킴은 몰론 가공비용을 증대시키는 문제점이 지적 되는 것이었고, 일본특허 공보 (소) 39-8221의 처리법에서 장시간의 활성화 처리와 질화 처리로서 두꺼운 질화층을 얻는 방법이 제공되고 있으나, 이는 통상의 고급 강재를 사용하고 있을 뿐 아니라 처리법이 복잡하고 장시간이 소요되어 저가의 고강도 줄을 제공할 수 없는 것이다.Conventional saws, nails, etc. are made of KS1, 2 kinds of carbon tool steel or SKC 8 kinds of cutting tool steel as materials, but the special mold made of high-grade alloy steel because the hardness of the finished string was only about HV960. In the case of cutting hard workpieces, the cutting edge of the file is easily worn out, which increases the consumption of the wire, takes a long time, and reduces the efficiency of the lighting work. In the method of Japanese Patent Publication No. 39-8221, there is provided a method of obtaining a thick nitride layer as a long time activation process and nitriding process. It is impossible to provide a low cost, high strength line.

본 발명은 이와같은 제반 문제점을 해결하고 있는 줄의 제조방법에 관한 것이며, 줄의 소재로서 고급강재에 대체하여 경제적인 스테인레스 강제를 사용할수 있게 되었고 간결하고 비교적 신속한 처리공정으로 고경도의 줄을 제공할수 있는 줄의 제조방법을 제공하려는 것이다.The present invention relates to a method for manufacturing a string that solves all these problems, and it is possible to use economical stainless steel in place of high grade steel as a material of the string, and to provide a high hardness string with a simple and relatively rapid treatment process It is intended to provide a method of making strings.

본 발명의 두드러진 특징은 열처리시에 내부응력이 다량 잔존하는 스테인레스 강재를 가압성형하여 소재를 성형하고, 스체인레스 소재의 표면에 존재하는 산화피막을 활성하시키는 처리에 이하여 주처리인 질화의 장애 요인을 제거하며, 질화처리 되는 예리한 줄날의 취약성을 제거하기 위하여 소재에 박막의 도금층을 형성하며 질화처리시에는 염욕속에 촉매를 첨가함으로써 단시간내에 두꺼운 질화층의 형성된 고경도 스체인레스 중을 제공할 수 있게 하는 것이다.A distinctive feature of the present invention is that the material is formed by pressing a stainless steel material having a large amount of internal stress during heat treatment, and activating an oxide film present on the surface of the chainless material. In order to eliminate the obstacles and to remove the fragility of the sharp edges that are nitrided, a thin plated layer is formed on the material, and during the nitriding treatment, a catalyst is added to the salt bath to remove the high hardness chain formed of the thick nitride layer in a short time. To make it available.

본 발명을 더욱 상세히 설명하면 다음과 같다. 소재는 KSD 3706스테인레스 강 중 STS 304, STS 201, KSD 3679, STS 304 WSA, KSD 3702, STS 304 WR등의 스테인레스 강재를 경도 HV250 이상이 되게 가압성형하여 줄의 원형을 만든다. 스테인레스 소재를 가압성형함은 소재의 열처리시 내부용력이 잔존하는 스테인레스 강의 성질을 활용하기 위한것 (일반적인 강재는 열처리시에 내부 응력이 제거됨)이며, 내부응력중 잔존 압축 응력에 의하여 후술하는 염욕질화 공정에서 질화층의 화합층 이하의 백층과 확산츠의 경도가 상승되고 줄의 내마모성과 굽힘 강도등의 내구성이 크게 향상되는 것이다.The present invention is described in more detail as follows. The material is made of KSD 3706 stainless steel, such as STS 304, STS 201, KSD 3679, STS 304 WSA, KSD 3702, STS 304 WR, and press-molded to a hardness of HV250 or higher to form a circular shape of the string. Press molding of stainless steel is to take advantage of the properties of stainless steel in which internal forces remain during heat treatment of materials (general steels have internal stress removed during heat treatment), and salt baths described later by residual compressive stresses in internal stress. In the oxidization process, the hardness of the white layer below the compounded layer of the nitride layer and the diffuser is increased, and the durability such as abrasion resistance and bending strength of the string is greatly improved.

스테인레스 성형 소재는 표면에 지극히 안정된 산화피막의 존재로 인하여 질화 처리를 저해하게 되므로 질화처리에 선행하여 아래와 같은 액조성과 처리 조건에 따라 산화 피막의 활성화 처리를 행하게 되는 것이다.Since the stainless molding material inhibits the nitriding treatment due to the presence of an extremely stable oxide film on the surface, the activation process of the oxide film is performed in accordance with the following liquid composition and treatment conditions prior to the nitriding treatment.

〈활성화 처리의 액 조성 및 처리조건〉<Liquid composition and treatment conditions of the activation treatment>

염화니켈 (NiCl2) 150~240 g/lNickel Chloride (NiCl 2 ) 150 ~ 240 g / l

염산 (HC1) 50~145 g/lHydrochloric acid (HC1) 50-145 g / l

전류 (A) 5~20 A/dm2 Current (A) 5 ~ 20 A / dm 2

시간(sec) 30~90 secTime (sec) 30 ~ 90 sec

온 도 상 온Temperature Room Temperature

위화 같은 활성화 처리액 (NiCl2, HC1)에 소재를 넣고 30~90초간 5~20 A/dm2의 전류를 가하면 스테인레스 표면의 산화막이 활성화 되어 질화 처리의 장애가 제거되며, 액조성 및 처리조건은 수치의 하한에서 활성화가 불환전하고 처리시간이 길어지며, 상한 이상이면 비경제적이고, 또한 소재에 니켈이 많이 오르면 오히려 질화를 저해하게 되는 것이다.If the material is added to the activation treatment solution (NiCl 2 , HC1) such as gasification, and the current of 5 ~ 20 A / dm 2 is applied for 30 ~ 90 seconds, the oxide film on the stainless surface is activated, eliminating the obstacle of nitriding treatment. At the lower end of the numerical value, activation is unchanged and processing time is long, and if it is above the upper limit, it is uneconomical, and if a large amount of nickel rises in the material, the nitriding is inhibited.

활성화 처리된 소재에는 크톰, 카드뮴, 니켈 또는 주적등을 1~10미크톤 두께로 도금처리 함으로써 예리한 줄날의 질화처리에 따른 취약성을 제거하는 것이다.Activated materials are plated with 1 to 10 microns thick, such as chromium, cadmium, nickel or cast iron, to eliminate the vulnerability of sharp nitriding.

도금 처리된 소재는 아래와 같이 촉매로서 전기재련된 Ti분말을 첨가한 청화 화합염과 제 3차적인 탄산 혼합염 속에서 단시간내에 100미크톤 이상의 두꺼운 질화층을 형성하여 소망의 고경도 스테인레스 조줄을 얻게 되는 것이다.The plated material forms a thick nitride layer of more than 100 microtons in a short time in the cyanide compound and the third carbonic acid mixed salt containing the re-refined Ti powder as a catalyst to obtain a desired high hardness stainless steel joule. Will be.

〈염옥 조성 및 처리조건〉<Pyrophyll Composition and Treatment Conditions>

Nac1. KCN. NaCNO 또는 KCND 80 중량 ％Nac1. KCN. NaCNO or KCND 80% by weight

Na2CO3또는 Nac1 15~20 중량 ％Na 2 CO 3 or Nac1 15-20 wt%

Ti(전기정련된것)분말 0.005-0.01 중량 ％Ti (Electro-Refined) Powder 0.005-0.01 Weight%

온 도 500~508℃Temperature 500 ~ 508 ℃

시간 3~6시간3-6 hours

염욕중에 첨가한 Ti분말은 욕중액면에서 공기와 접촉하여 Tio(일산화티탄)으로 욕중에 존재하면서 질화 처리에 고도의 촉매 작용을 하여 질화를 축진시킨다. 즉 청화 탄산 혼합욕(NaCN, Na2, Co2)에서 열분해로 생성된 CN이 Fe와 작용하여 Fe3N이 생성된다. C의 일부는 소멸되고 Na2Co2는 욕중에서 가라않는다. 이러한 반응이 효과적으로 반복되어 단시간내에 두꺼운 질화층이 형성된다고 생각된다.Ti powder added in the salt bath is present in the bath as Tio (titanium monoxide) in contact with the air in the bath liquid surface, and catalyzes nitriding by highly catalyzing the nitriding treatment. In other words, CN 3 generated by pyrolysis in the cyanated carbonate mixed bath (NaCN, Na 2 , Co 2 ) acts with Fe to form Fe 3 N. Part of C dies out and Na 2 Co 2 does not sink in the bath. It is thought that this reaction is effectively repeated and a thick nitride layer is formed in a short time.

[실시예]EXAMPLE

SUS, STC304 스테인레스 강재를 HV250 이상이 되게 가압 성형하여 줄의 원형을 만들고, 가압성형된 소재를 염화니켈 200g 50g, 7A/dm2의 전류를 가한 조액에 30초간 침지하여 산화 피막을 활성화 처리하고,SUS and STC304 stainless steels were press-molded to HV250 or more to make a circular shape, and the press-molded material was immersed in a crude solution applied with nickel chloride 200g 50g, 7A / dm 2 for 30 seconds to activate the oxide film.

크롬 250g, 황산 2.5g의 50℃용액에 30초간 침지하고 10A/d/m2의 전류를 인가하여 소재의 표면에 도금처리 하였으며, 도금된 소재를 NaCN(또는 NaCNO) 80중량 ％, 탄산나트륨 20중량 ％를 혼가하고 전기 정련된 금속 티탄 분말 0.005중량 ％를 첨가하며 570℃를 유지하는 염욕에 5시간 침지, 질화처리하여 표1과 같은 경도의 줄을 얻었다.It was immersed in 50g solution of 250g of chromium and 2.5g of sulfuric acid for 30 seconds and plated on the surface of the material by applying a current of 10A / d / m 2. The plated material was 80% by weight of NaCN (or NaCNO) and 20% of sodium carbonate. % Was added, and 0.005% by weight of the electro-refined metal titanium powder was added thereto, followed by immersion and nitriding for 5 hours in a salt bath maintained at 570 ° C to obtain a string of hardness as shown in Table 1.

[표 1]TABLE 1

Figure kpo00001
Figure kpo00001

위와 같이 처리하여 얻은 줄은 고경도, 내마모성을 유지함은 물론 날끝이 예리함에 따라 취약성이 제거된 것이었다.The strings obtained by the above treatment were not only hardened and hardened but also vulnerable as the blade edge was sharpened.

[비교예 1]Comparative Example 1

상기 실시예와 동일 조건으로 제조하되, 활성화 처리후의 도금 공정을 생략하여 표2와 같이 고경도의 줄은 얻을수 있었으나, 예리한 줄날이 눕거나 마멸되었으며 굽힘강도 또한 낮았다.Manufactured under the same conditions as in the above example, the high hardness wires were obtained as shown in Table 2 by omitting the plating process after the activation treatment, but the sharp edges were laid or worn out and the bending strength was also low.

[표 2]TABLE 2

Figure kpo00002
Figure kpo00002

[비교에 2][2 on comparison]

상기 실시예와 동일한 조건으로 제조하되 소재를 가압하지 않은 것을 사용한 결과 경도가 상기 실시예보다 낮았으며 줄날의 취약성이 극심하여 절삭이 불가능하였다.Manufactured under the same conditions as in the above example, but using a material that was not pressurized, the hardness was lower than that of the above example, and the cutting edge was extremely severe and cutting was impossible.

상기한 바와 같이 본 발명에 의하면 스텐레스강을 줄의 소재로 사용할 수 있게 되었으며, 가압성형하여 내부에 압축응력을 잔존시킴으로써 내마모성의 취약성을 제거하였고, 산화피막의 활성화 처리후 촉매를 가한 염욕속에서 비교적 단시간내에 고경도의 두꺼운 질화층을 얻을 수 있었고, 활성화 처리후 도금충을 형성하므로써 줄날이 예리함에 다른 취약성을 제거할 수 있게 되어 있는 고경도 줄의 제조 방법을 제공하게 된 것이다.As described above, according to the present invention, stainless steel can be used as a material for Joule, and it is press-molded to maintain the compressive stress inside, thereby eliminating the fragility of wear resistance, and in the salt bath to which the catalyst is applied after the activation process of the oxide film. It was possible to obtain a high hardness thick nitride layer within a short time, and to provide a method of manufacturing a high hardness string, which is capable of removing other vulnerabilities due to the sharpness of the blade by forming a plated worm after activation treatment.

Claims (1)

(2회 정정) SUS-STS 304스테인레스 강재를 HV250 이상이 되게 가압성형하여 줄의 원형을 형성한후, 상온에서 염화니켈 150~240 그램, 염산 50~150그램의 조액에 침지하고 30~90초동안 5~15A/dm2의 전류를 인가하여 산화피막을 활성와 처리하고, 크롬, 카드뮴, 니켈 또는 주석등을 1-10미크름 정도로 도금한 다음, 시안화나트륨, 시안화칼륨, NACNO 또는 KCNO 80중량％에 탄산나트륨 또는 염화나트륨 15~20중량％ 혼가하고 전기제련된 금속티탄분말 0.005~0.1중량％를 첨가한 500~580℃의 염옥에서 3~6시간 질화처리하는 것을 특징으로하는 고경도 줄의 제조방법.(Twice correction) SUS-STS 304 stainless steel is press-molded to HV250 or more to form a round shape, and then immersed in a crude solution of nickel chloride 150-240 grams and hydrochloric acid 50-150 grams at room temperature for 30-90 seconds. During which the oxide film is activated and treated by applying a current of 5 to 15 A / dm 2 , plated with chromium, cadmium, nickel or tin to about 1-10 microns, and then 80% by weight of sodium cyanide, potassium cyanide, NACNO or KCNO 15 to 20% by weight of sodium carbonate or sodium chloride, and 0.005 to 0.1% by weight of an electrosmelted metal titanium powder in a jadeite at 500 to 580 ° C. for 3 to 6 hours.
KR1019840004403A 1984-07-21 1984-07-21 Method of a high hardness file KR880000095B1 (en)

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Publication number Priority date Publication date Assignee Title
KR100920212B1 (en) * 2007-06-07 2009-10-05 김영우 Method of metal surface treatment

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KR100920212B1 (en) * 2007-06-07 2009-10-05 김영우 Method of metal surface treatment

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