KR20030036365A - A heat treatment process of seat and valve for automatic transmission - Google Patents
A heat treatment process of seat and valve for automatic transmission Download PDFInfo
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- KR20030036365A KR20030036365A KR1020030016255A KR20030016255A KR20030036365A KR 20030036365 A KR20030036365 A KR 20030036365A KR 1020030016255 A KR1020030016255 A KR 1020030016255A KR 20030016255 A KR20030016255 A KR 20030016255A KR 20030036365 A KR20030036365 A KR 20030036365A
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- heat treatment
- nitriding
- temperature
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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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/46—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for sheet metals
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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
- C21D1/62—Quenching devices
- C21D1/63—Quenching devices for bath quenching
-
- 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
-
- 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
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D5/00—Supports, screens, or the like for the charge within the furnace
- F27D2005/0081—Details
- F27D2005/0093—Means to maintain the form of the article
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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)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
Description
본 발명은 스테인레스강종의 밸브 및 시트의 약품질화 열처리 제조방법에 관한 것으로서, 특히 차량의 자동변속기에 사용되는 밸브 및 시트의 열처리제조방법에 관한 것이다.The present invention relates to a method for manufacturing weak quality heat treatment of valves and seats of stainless steel, and more particularly, to a method for manufacturing heat treatment of valves and seats used in an automatic transmission of a vehicle.
일반적으로 밸브 및 시트의 열처리방법의 공정을 살펴보면;Looking at the process of the heat treatment method of the valve and seat in general;
먼저 열처리 준비단계인 단취작업공정과 예열공정, 질화공정, 냉각공정, 세척공정, 건조공정, 샌딩처리 공정들로 이루어진다.First, it consists of the preheating process, the preheating process, the nitriding process, the cooling process, the washing process, the drying process, and the sanding process.
그러나 종래의 열처리방법들은 250℃∼400℃의 열에서 예열작업을 하고, 570℃의 질화로에서 1∼3시간동안 질화작업을 하는 과정에서 CNO가34∼36%상태가 되어 질화 층이 안정되지 않아 박리현상이 발생되며, 또 냉각공정에서는 200∼350℃에서 공 냉 시키며, 더운물로 헹구는 정도의 세척과정과 100∼150℃의 전기로에서 수분을 제거시키는 정도의 건조과정을 거치는 가운데서 제품의 표면경도가 높아지고 질화층의 안정화가 저하되어 마지막 샌딩처리공정에서 제품의 모서리부분이 깨어져 불량품이 다량으로 발생되어 생산성 저하와 제품의 품질문제 등의 발생으로 인하여 원가상승의 요인이 되며 나아가서는 경쟁력 저하의 큰 원인이 되기도 하였다.However, in the conventional heat treatment methods, preheating is performed at 250 ° C to 400 ° C, and nitriding is performed at 570 ° C for 1 to 3 hours. In the cooling process, the surface hardness of the product is in the process of air cooling at 200 ~ 350 ℃, rinsing with hot water and drying process to remove moisture from the electric furnace at 100 ~ 150 ℃. In the last sanding process, the edges of the product are broken and a large amount of defective products are generated, resulting in a decrease in productivity and quality problems of the product. It also became.
따라서, 상기한 바와 같은 문제점을 해결하기 위한 본 발명의 목적은 SUS강종의 부품에 적합한 열처리 공정을 통하여 내마모성이 우수한 제품을 제공함에 있다.Accordingly, an object of the present invention for solving the above problems is to provide a product having excellent wear resistance through a heat treatment process suitable for the parts of SUS steel.
상기한 바와 같은 목적을 달성하기 위한 본 발명은,The present invention for achieving the above object,
우선 제품의 균일한 열처리를 위하여 탈지공정이 필요하다.First, a degreasing process is necessary for uniform heat treatment of the product.
상기 탈지공정은 기계 가공된 제품의 표면에 묻은 기름기를 제거하기위한 공정으로서 전용지그를 사용하여 제품을 정렬 단취시켜, T.C.E를 사용하여 탈지시킨다.The degreasing process is a process for removing grease on the surface of a machined product, using a dedicated jig to align the product and degreasing it using T.C.E.
그리고 350℃의 예열로에서 1시간 동안의 예열공정을 거친 후, 570℃의 질화로에서 40분∼1시간 동안의 질화작업과정과,After a preheating process for 1 hour in a preheating furnace at 350 ° C., a nitriding process for 40 minutes to 1 hour in a 570 ° C. nitriding furnace,
공기 중에서의 200℃이하의 공 냉 및 알칼리 세척 조에서 수 냉시키는 냉각과정과, 더운물 속에서 0.2∼0.5m/m의 쇼트볼을 이용하여 에어쇼팅 시키는 세척과정과, 150∼180℃의 전기로에서 1시간이상의 건조과정과, 100∼170메쉬의 그라스를 이용하여 샌딩 시키는 샌딩과정으로 이루어진 열처리공정을 구현하였다.Cooling process to cool water in air and alkali washing tank under 200 ℃ in air, washing process to short-circuit with 0.2 ~ 0.5m / m shot ball in hot water, and electric furnace of 150 ~ 180 ℃ A heat treatment process consisting of a drying process of more than 1 hour and a sanding process of sanding using 100 to 170 mesh of glass was implemented.
도 1은 본 발명의 바람직한 실시 예에 따른 전체 공정도.1 is an overall process diagram according to a preferred embodiment of the present invention.
이하 본 발명의 바람직한 실시예의 상세한 설명을 실시 공정에 따라 상세히설명한다.Hereinafter, the detailed description of the preferred embodiment of the present invention will be described in detail according to the implementation process.
우선 본 발명에서 제안하고자 하는 열처리공정의 개념을 살펴보면, 제품의 모든 부위가 균일하게 열처리되어 박리현상을 방지하며 내마모성이 우수한 제품을 제공하고자함을 제안하고자 하는 것이다.First, the concept of the heat treatment process to be proposed in the present invention is to propose to provide a product having excellent wear resistance by preventing all the parts of the product is heat-treated uniformly peeling phenomenon.
제 1 공정: 단취 및 탈지공정First step: deodorization and degreasing
먼저 제품의 균일한 열처리를 위하여 탈지공정이 필요하다.First, a degreasing process is required for uniform heat treatment of the product.
상기 탈지공정은 기계 가공된 제품의 표면에 묻은 기름기를 제거하기위한 공정으로서 전용지그를 사용하여 제품을 정렬 단취시켜, T.C.E를 사용하여 탈지시킨다. 상기 탈지공정에서 사용되는 전용지그는 제품의 규격이 소형이므로 일정한 간격을 유지하며 정렬하여 단취시키는 것이 중요하다.The degreasing process is a process for removing grease on the surface of a machined product, using a dedicated jig to align the product and degreasing it using T.C.E. The dedicated jig used in the degreasing process is important because the product is small in size and aligned by maintaining a constant interval.
제 2 공정 : 예열공정Second Process: Preheating Process
그리고 질화작업에 가장 적합한 300∼350℃의 예열로에서 1∼1.5시간 동안의 예열공정을 거친다.And preheating process for 1-1.5 hours is carried out in the preheating furnace of 300-350 degreeC which is most suitable for nitriding operation.
제 3 공정 : 질화공정Third Process: Nitriding Process
그 다음 570℃의 질화로에서40분∼1시간 동안 에어를 이용하여 교반시키며 질화작업을 하며, 이 과정에서 질화 층의 안정화와 박리현상의 방지를 위하여 CNO:28∼32%, CN:2.5%이하, CO3:22.5%이하를 관리하며 부품에 화합물 층이 10∼20μ 과 Hv:900∼1200을 얻을 수 있다.Afterwards, nitriding is carried out using air for 40 minutes to 1 hour in a nitriding furnace at 570 ° C. In this process, CNO: 28 to 32% and CN: 2.5% or less to stabilize the nitride layer and prevent delamination. , CO3: 22.5% or less, the component layer of 10-20μ and Hv: 900-1200 can be obtained.
제 4 공정 : 냉각공정4th process: cooling process
그리고 상기와 같은 질화작업 후 박리현상의 방지상태에서 치수의 안정화를위하여 공기 중에서 200℃이하로 유지시킨 후, 산화방지를 위하여 알카리 세척 조에서 에어로 교반시키며 냉각 시키는 냉각공정을 거친다.After the nitriding operation as described above, the temperature is maintained at 200 ° C. or lower in the air for stabilization of the dimension in the prevention of peeling phenomenon, and then subjected to a cooling step of stirring and cooling with air in an alkali washing bath to prevent oxidation.
제 5 공정 : 세척공정5th process: washing process
상기 냉각공정을 거친 제품은 제품의 세척이 어려운 구석부분 등을 세밀히 세척하기위하여 더운물 속에서 0.2∼0.5m/m의 쇼트볼을 이용하여 에어쇼팅 시키는 세척공정을 거친다.The product undergoes the cooling process is subjected to an air shortening process using a short ball of 0.2 ~ 0.5m / m in hot water in order to finely clean the corners and the like difficult to clean the product.
제 6 공정 : 건조공정6th process: drying process
상기의 세척공정을 거친 제품의 수분제거를 위하여 150∼180℃의 전기로에서 1시간이상으로 충분히 건조시킨다.In order to remove moisture of the product which passed the washing process, it is sufficiently dried in an electric furnace of 150-180 ° C. for at least 1 hour.
제 7 공정 : 샌딩공정7th step: Sanding process
상기 건조로 충분히 건조된 제품은 마지막 표면처리공정인 샌딩 작업을 한다.The product sufficiently dried by the drying is a sanding operation which is a final surface treatment process.
상기 샌딩 작업에서는 제품의 표면광택과 표면조도를 위하여 100∼170메쉬의 그라스를 이용하는 그라스샌딩을 적용시키며, 그라스샌딩 작업은 유리섬유재질의 특성상 밀폐된 공간에서 실시되며, 본 발명에 따른 공정에서는 작업자의 안전과 제품의 이탈을 방지하기 위하여 밀폐된 공간 내에 원통형 치구를 내장시켜 에어분사기를 이용하여 샌딩 작업을 한다.In the sanding operation, glass sanding using glass of 100 to 170 mesh is applied for surface gloss and surface roughness of the product, and the glass sanding operation is performed in a closed space due to the characteristics of the glass fiber material. In order to prevent the safety of the product and the separation of the product, a cylindrical jig is embedded in an enclosed space and sanded by an air sprayer.
이상으로 살펴본 바와 같이, 본 발명은 지금까지 개발된 표면 열처리방식으로는 해결하지 못한 문제점들을 상기한 열처리 공정을 통하여 안정된 질화 층으로내마모성 및 적정한 표면경도를 유지하여 제품의 품질을 향상시키고 생산원가를 절감하여 경쟁력을 갖도록 하는 등 스테인레스강종의 밸브 및 시트의 열처리 제조방법에 있어서 신규한 기술을 제시한 발명이다.As described above, the present invention improves the quality of the product and maintains the production cost by maintaining the wear resistance and the appropriate surface hardness as a stable nitride layer through the heat treatment process, which has not been solved by the surface heat treatment method developed so far. It is an invention that presents a novel technology in the heat treatment manufacturing method of the valve and seat of stainless steel, such as to reduce the competitiveness.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100679326B1 (en) * | 2005-05-26 | 2007-02-07 | 주식회사 삼락열처리 | Heat treatment method |
KR20180066288A (en) | 2016-12-07 | 2018-06-19 | 전자부품연구원 | Generation apparatus and method of Gugak music |
KR20230144134A (en) * | 2022-04-06 | 2023-10-16 | 주식회사 엔디케이 | Ion nitridation manufacturing method of sintered CVVD lifter housing for automobile using jig |
-
2003
- 2003-03-11 KR KR1020030016255A patent/KR20030036365A/en not_active Application Discontinuation
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100679326B1 (en) * | 2005-05-26 | 2007-02-07 | 주식회사 삼락열처리 | Heat treatment method |
KR20180066288A (en) | 2016-12-07 | 2018-06-19 | 전자부품연구원 | Generation apparatus and method of Gugak music |
KR20230144134A (en) * | 2022-04-06 | 2023-10-16 | 주식회사 엔디케이 | Ion nitridation manufacturing method of sintered CVVD lifter housing for automobile using jig |
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