KR100238896B1 - Heating processing method of a tub-surface for washine machine - Google Patents
Heating processing method of a tub-surface for washine machine Download PDFInfo
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- KR100238896B1 KR100238896B1 KR1019970028052A KR19970028052A KR100238896B1 KR 100238896 B1 KR100238896 B1 KR 100238896B1 KR 1019970028052 A KR1019970028052 A KR 1019970028052A KR 19970028052 A KR19970028052 A KR 19970028052A KR 100238896 B1 KR100238896 B1 KR 100238896B1
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- stainless steel
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- washing tank
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/26—Casings; Tubs
- D06F37/261—Tubs made by a specially selected manufacturing process or characterised by their assembly from elements
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0205—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips of ferrous alloys
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/02—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
- C21D8/0247—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips characterised by the heat treatment
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/02—Rotary receptacles, e.g. drums
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Textile Engineering (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
Abstract
본 발명은 세탁기의 세탁조를 가공하고 이 가공된 세탁조의 표면을 열처리 함에 있어서, 상기 열처리되는 세탁조의 표면에 고광택 및 내식성을 갖도록 한 세탁기의 세탁조 표면 열처리 방법에 관한 것으로, 본 발명은 합금된 스텐인레스를 냉간 압연공정, 열처리공정, 압연조절공정, 가공공정을 거쳐서 스테인레스 세탁조를 제작함에 있어서, 상기 열처리 공정시 상기 냉간 압연공정을 거쳐서 압연된 스텐인레스를 환원성분위기(N2, H2GAS)조건의 전기로(1100℃)에서 외부 산소(O2)를 유입 차단하면서 스텐인레스의 표면을 열처리한후, 상기 열처리된 스텐인레스의 표면에 묻어 있는 기름을 제거하기 위하여 탈지하도록 함으로써, 세탁조의 표면에 고광택 및 우수한 내식성을 유지할수 있도록 한 것을 특징으로 한다.The present invention relates to a washing tank surface heat treatment method of a washing machine for processing a washing tank of a washing machine and heat-treating the surface of the processed washing tank to have high gloss and corrosion resistance on the surface of the washing tank to be heat-treated, and the present invention relates to alloyed stainless steel. In manufacturing a stainless steel washing tank through a cold rolling process, a heat treatment process, a rolling control process, and a machining process, the stainless steel rolled through the cold rolling process during the heat treatment process is subjected to a reduction component (N 2 , H 2 GAS) electric furnace. Heat treatment of the surface of the stainless steel while blocking the flow of external oxygen (O 2 ) at (1100 ℃), and then to degrease to remove the oil on the surface of the heat treated stainless steel, high gloss and excellent corrosion resistance on the surface of the washing tank It is characterized by being able to maintain.
Description
본 발명은 세탁기의 세탁조 표면 열처리 방법에 관한 것으로, 특히 세탁기의 세탁조를 가공하고 이 가공된 세탁조의 표면을 열처리 함에 있어서, 상기 열처리되는 세탁조의 표면에 고광택 및 내식성을 갖도록 한 세탁기의 세탁조 표면 열처리 방법에 관한 것이다.The present invention relates to a washing tank surface heat treatment method of a washing machine, and in particular, in processing a washing tank of a washing machine and heat treating the surface of the processed washing tank, the washing tank surface heat treatment method of the washing machine having high gloss and corrosion resistance on the surface of the washing tank to be heat treated. It is about.
일반적으로 세탁기에서 세탁조는 크게 유기항균제가 함유된 ABS합성수지와, 페라이트계 냉연강판, 최근들어 오스테나이트계 스텐인레스로 형성하게 되는데, 이때 상기 유기항균제가 함유된 ABS 합성수지의 경우, 사출성형후 세탁조의 내외주면에 실버현상(표면의 수지흐름으로 발생하는 가늘고 긴 선)이 발생되고, 성형중에는 수분이 발포하여 작은돌기(구멍)등이 발생하는 문제점이 있으며, 또한 상기 수지에 함유되는 상기 유기계 항균제(이미다졸계 유기화합물, 항균성 제올라이트, 치아조린계 유기화합물)의 경우에도 상기 이미다졸계 유기화합물은 수지의 경우, 사출성형시 200℃ 에서 승화가 일어나고 성형품의 외관이 불량이 발생되며, 열 안정성 및 항균지속성이 부족하고, 인체 유해성의 논란이 제기되고 있으며, 상기 유기계 항균 제로 제올라이트의 경우에도 성형품 표면의 광택도가 저하되고, 건조후 수지가 변색되는 등의 문제점이 있다.In general, a washing tank in a washing machine is largely formed of an ABS synthetic resin containing an organic antimicrobial agent, a ferritic cold rolled steel sheet, and recently, an austenitic stainless steel. In this case, in the case of the ABS synthetic resin containing the organic antimicrobial agent, the washing tank after injection molding is formed. There is a problem that silver phenomenon (a long thin line generated by the resin flow on the surface) occurs on the main surface, and small projections (pores) occur due to moisture foaming during molding. Even in the case of an organic compound, such as a multizole-based organic compound, an antimicrobial zeolite, or a chiazoline-based organic compound, the imidazole-based organic compound may cause sublimation at 200 ° C. during injection molding, resulting in poor appearance of the molded product, Lack of sustainability, controversy of human hazards has been raised, the organic antimicrobial agent zeolai Even in the case of a stripe, there is a problem that the glossiness of the surface of the molded article is lowered and the resin is discolored after drying.
그래서 상기 합성수지계에서 야기되는 광택도, 변형, 내구성 등의 문제점을 해소하기 위하여, 최근들어 상기 페라이트계 냉연강판의 세탁조 또는 오스테나이트계 스텐인레스를 사용하게 되는데, 상기 스텐인레스들은 모두 주성분인 강철에 크롬(Cr), 구리(Cu), 니오브(Nb), 또는 니켈(Ni), 몰리브덴(Mo)을 함금한 금속제 이므로, 제작시 합성수지와는 전혀 다른 냉간 압연공정, 열처리공정, 압연조절공정, 가공공정을 거쳐서 제작하게 된다.Thus, in order to solve problems such as glossiness, deformation, and durability caused by the synthetic resin system, recently, a washing tank or an austenitic stainless steel of the ferritic cold rolled steel sheet has been used. It is made of Cr, copper (Cu), niobium (Nb), or metal containing nickel (Ni) and molybdenum (Mo). Therefore, cold rolling process, heat treatment process, rolling control process, processing process, which are completely different from synthetic resin, It is produced through.
그러나 상기 금속제인 세탁조를 여러공정을 거쳐서 제작함에 있어서, 특히 열처리 공정시, 종래에는 냉간압연된 스텐인레스를 개방된 분위기에서 LNG, 경유를 열원으로 열처리(1100℃)하도록 되어 있어, 상기 열처리로 인하여 세탁조의 표면에 외부의 산소와 접촉에 의한 스켈(scale)층이 형성되는 반면에, 상기 열원으로 인하여 스텐인레스 표면이 탈지가 되므로, 열처리후에는 별도의 탈지를 할 필요가 없으나, 상기 스켈층 제거하기 위하여 별도로 묽은 염산에 침적하여 세척을 하게 되어, 결국 열처리후 최종표면은 우유색의 색조를 띄게 되므로 스텐인레스 본래의 표면 조도(광택도)가 상대적으로 낮아질 뿐만 아니라, 묽은 염산에 침적으로 인하여 표면에 내식성이 저하되는 문제점을 가지게 되었다.However, in manufacturing the metal washing tank through various processes, in particular, during the heat treatment process, conventionally, the cold rolled stainless steel is heat treated (1100 ° C.) with LNG and light oil as a heat source in an open atmosphere. While a scale layer is formed on the surface of the surface by contact with external oxygen, the stainless steel surface is degreased due to the heat source, so there is no need for a separate degreasing after the heat treatment. Separately, it is washed by dipping in dilute hydrochloric acid. After the heat treatment, the final surface has milky hue. Therefore, the original surface roughness (gloss) of stainless steel is not only relatively low. It has a problem of deterioration.
본 발명의 목적은 스텐인레스 세탁조를 가공 제작함에 있어서, 열처리 공정시 세탁조의 표면이 고광택 및 내식성을 유지할 수 있는 표면 열처리 방법을 제공하고자 하는데 있다.SUMMARY OF THE INVENTION An object of the present invention is to provide a surface heat treatment method in which a surface of a washing tank can maintain high gloss and corrosion resistance during a heat treatment process in manufacturing a stainless steel washing tank.
상기의 목적을 실현하기 위하여 본 발명은 세탁기의 세탁조 표면 열처리 방법에 있어서, 합금된 스텐인레스를 냉간 압연공정후 환원성분위기(질소와 수소가스)조건의 전기로에서 산소를 차단하면서 표면 열처리를 하고, 상기 열처리된 압연 표면을 탈지 처리하여서 된 것을 특징으로 한다.In order to achieve the above object, the present invention provides a surface treatment method for a washing tank of a washing machine, wherein the alloyed stainless steel is subjected to a surface heat treatment while blocking oxygen in an electric furnace under a reducing atmosphere (nitrogen and hydrogen gas) after cold rolling. It is characterized by degreasing the obtained rolled surface.
제1도는 본 발명 세탁조 표면 열처리 방법에 대한 열처리 공정도.1 is a heat treatment process chart for the washing tank surface heat treatment method of the present invention.
이하 실시예에 의거 본 발명을 상세히 설명하면 다음과 같다.Hereinafter, the present invention will be described in detail with reference to the following Examples.
합금된 스텐인레스를 냉간 압연공정, 열처리공정, 압연조절공정, 가공공정을 거쳐서 스텐인레스 세탁조를 제작함에 있어서, 상기 열처리공정시 상기 냉간 압연공정을 거쳐서 압연된 스텐인레스를 환원성분위기(N2, H2GAS)조건의 전기로(1100℃)에서 외부 산소(O2)를 유입 차단하면서 스텐인레스의 표면을 열처리하고, 이어서 상기 열처리된 스텐인레스의 표면에 묻어있는 기름을 제거하기 위하여 탈지 공정으로 가서 스텐인레스 표면에 기름을 제거한후, 상기 탈지된 스텐인레스를 압연조절공정으로 프레싱기에 넣고 압연조절하여 스텐인레스의 두께를 조절하고, 상기 압연조절된 스텐인레스를 가공공정을 거쳐서 스텐인레스 세탁조를 제작하게 된다.In manufacturing a stainless steel washing tank through the cold rolling process, heat treatment process, rolling control process, and processing process of the alloyed stainless steel, the stainless steel rolled through the cold rolling process during the heat treatment process is reduced (N 2 , H 2 GAS). Heat-treat the surface of the stainless steel while blocking external oxygen (O 2 ) inflow in a conditional electric furnace (1100 ° C.), and then go to a degreasing process to remove oil from the surface of the heat-treated stainless steel. After removal, the degreased stainless steel is placed in a pressing machine in a rolling control process to adjust the thickness of the stainless steel by rolling control, and the stainless steel washing tank is manufactured through the rolling process.
상기와 같은 공정으로 이루어지는 스텐인레스 표면은 환원성분위기의 전기로에서 열처리하게 되므로 상기 열처리되는 스텐인레스 표면이 산소와 접촉이 발생되지 않게 되어 스켈층이 형성되지 않으면서 열처리되게 되어 산소 및 스켈층 형성에 따른 스텐인레스 표면에 내식성이 저하되는 것을 방지하게 되어 최종 공정완료후 냉간 압연 특유의 고광택 표면을 유지할 수 있게 되는 것이다.The stainless steel surface formed by the above process is heat-treated in an electric furnace of a reducing component crisis, so that the stainless steel surface to be heat-treated does not generate contact with oxygen and is heat-treated without forming a skeletal layer. The corrosion resistance is prevented from being lowered, so that after finishing the final process, it is possible to maintain a high gloss surface peculiar to cold rolling.
이와같이 열처리하여 제작된 스텐인레스 세탁조는 세탁시 세탁조표면의 고광택 유지에 의하여 오염물질이 표면에 잔존하지 않을 뿐만 아니라, 의류의 단추나 지퍼에 의하여 표면의 긁힘을 최소화 할 수 있어 보다 위생적인 세탁조 유지 및 나아가서는 깨끗한 세탁을 할수 있게 되는 것이다.Stainless steel washing tank manufactured by heat treatment like this does not have contaminants remaining on the surface due to high glossiness of the surface of the washing tank during washing, and also minimizes scratches on the surface by buttons or zippers of clothing. Will be able to do clean laundry.
이상에서 설명한 바와같이 본 발명은 냉간 압연된 스텐인레스를 고광택을 유지하기 위하여 열처리 공정시 산소(O2)를 차단된 환원성분위기(N2, H2GAS)조건의 전기로(1100℃)에서 열처리후 탈지하게 되므로, 상기 산소로 인한 스텐인레스의 표면에 산화반응이 일어나지 않게 되고, 또한 환원성분위기의 전기로에서 열처리하게 되므로 대기중 열처리에 비하여 내식성이 우수하고, 스텐인레스 표면에 스켈층이 형성되지 않게 되어, 상기 냉간 압연된 스텐인레스 표면에 스켈층을 제거하기 위하여 염산에 침적시켜 세척하지 않아도 되므로, 상기 스켈층 제거에 따른 환경오염 요인인 염산침적 공정을 수행하지 않아도 되어, 상기 염산으로 인하여 표면 조도 즉 광택이 저하되는 것을 방지할 수 있어, 상기 열처리후 최종 표면은 냉간압연 특유의 고광택 표면을 유지할 수 있는 효과를 제공하게 되는 것이다.As described above, in order to maintain high gloss of the cold rolled stainless steel, the present invention is subjected to heat treatment in an electric furnace (1100 ° C.) under a reduced atmosphere (N 2 , H 2 GAS), which blocks oxygen (O 2 ) during the heat treatment process. Since it is degreased, the oxidation reaction does not occur on the surface of the stainless steel due to the oxygen, and since the heat treatment is performed in an electric furnace of a reducing component crisis, the corrosion resistance is superior to the heat treatment in the atmosphere, and the Skel layer is not formed on the stainless steel surface. Since it is not necessary to immerse in hydrochloric acid to remove the Skel layer on the cold rolled stainless steel surface, it is not necessary to perform the hydrochloric acid deposition process, which is an environmental pollution factor due to the removal of the Skel layer. It can be prevented, the final surface after the heat treatment is cold rolling unique high gloss surface Which will provide the effect it can be maintained.
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| KR1019970028052A KR100238896B1 (en) | 1997-06-27 | 1997-06-27 | Heating processing method of a tub-surface for washine machine |
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| KR1019970028052A KR100238896B1 (en) | 1997-06-27 | 1997-06-27 | Heating processing method of a tub-surface for washine machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101222859B1 (en) | 2005-09-26 | 2013-01-16 | 삼성전자주식회사 | Rotary drum for drum washing machine and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101222859B1 (en) | 2005-09-26 | 2013-01-16 | 삼성전자주식회사 | Rotary drum for drum washing machine and manufacturing method thereof |
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