KR880000740B1 - Mould boards used coating the surfaces - Google Patents
Mould boards used coating the surfaces Download PDFInfo
- Publication number
- KR880000740B1 KR880000740B1 KR1019840008538A KR840008538A KR880000740B1 KR 880000740 B1 KR880000740 B1 KR 880000740B1 KR 1019840008538 A KR1019840008538 A KR 1019840008538A KR 840008538 A KR840008538 A KR 840008538A KR 880000740 B1 KR880000740 B1 KR 880000740B1
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- KR
- South Korea
- Prior art keywords
- coating agent
- ingot
- surface plate
- boards used
- used coating
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/04—Upset frames; Bottom boards or mould boards
- B22C21/06—Bottom boards or mould boards
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or patterns
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
Abstract
Description
본 발명은 강괴를 제조하기 위한 상주조괴 공정에서 정반과 강괴의 부착을 방지하기 위한 정반의 도포제에 관한 것이다. 현재 주괴공정에서 주로 사용되는 Sio2함량이 85% 정도인 규석질 도포재는 용융점이 1700℃로서, 조괴공정에서 주입되는 용강의 온도가 1600℃ 정도이므로 정반에 미치는 온도는 1600℃ 이하가 되기 때문에 규석질 도포재는 작업시 분말상태 그대로 존재하게 되어 정반과의 부착력이 좋지 못하게 되고 용강 낙하시 도포재가 용강에 의해 씻긴 부분은 정반표면이 노출되어 용강과 접하게 된다. 따라서 강괴와정반과의 부착현상이 빈번하게 발생함으로서 강괴와 정반을 분리키 위해서 강괴를 높은 위치에서 떨어뜨리는 충격형발이 불가피해지고 충격으로 인한 정반과 정반연와의 파손을 초래하게 된다. 이상과 같은 이유로 정반의 도포제는 용강의 주입온도보다 낮은 온도에서 액상이 생성되어 정반과 밀착됨으로서 강괴와 정반 사이에 분리층을 형성할 수 있어야 하는 것으로 본 발명은 이와같은 목적에 적합한 도포제를 제공코져 하는 것이다.The present invention relates to a coating agent for the surface plate to prevent the adhesion of the surface plate and the steel plate in the resident ingot process for producing the steel ingot. Silica coating material with 85% of Sio 2 content mainly used in the ingot process has melting point of 1700 ℃ and the temperature of molten steel injected in the ingot process is about 1600 ℃. When the vaginal coating material is present as it is in the powder state, the adhesion to the surface plate becomes poor, and when the molten steel falls, the surface of the coating material washed by the molten steel is exposed to the molten steel. Therefore, the attachment phenomenon between the ingot and the surface plate frequently occurs, so that an impact type dropping the ingot from a high position is inevitable to separate the ingot and the surface plate, resulting in damage between the surface plate and the surface plate due to the impact. For this reason, the coating agent of the surface plate should be able to form a separation layer between the ingot and the surface plate by forming a liquid phase at a temperature lower than the injection temperature of the molten steel, thereby providing a coating agent suitable for this purpose. It is.
본 발명의 도포제는 중량 %로서 10-15%의 고로슬래그(Slag), 40-60%의 소다장석, 20-30%의 물유리(Na2O-Sio2), 2-5% 인상흑연(C) 및 2-5%의 Fe-Si로 구성되어 있음을 특징으로 한다. 본 발명의 도포제는 930℃부터 액상이 생성되기 시작하여 1150℃에서는 완전히 용융되므로 철판과의 부착력이 양호하고 윤활작용을 하는 특성이 있다.The coating agent of the present invention is 10-15% blast furnace slag, 40-60% soda feldspar, 20-30% water glass (Na 2 O-Sio 2 ), 2-5% impression graphite (C ) And 2-5% of Fe-Si. The coating agent of the present invention starts to produce a liquid phase from 930 ℃ and is completely melted at 1150 ℃ has a good adhesion to the iron plate and has the property of lubricating action.
본 발명에 있어서 고로슬래그는 1차 용융되었던 물질로서 재용융이 용이하나 슬래그 중의 CaO, MgO 등의 고융점 물질의 영향을 감소시키기 위해서는 10-15%로 한다. 소다장석(Na2O·6SiO2·Al2O3)은 고로슬래그 중의 CaO 및 MgO에 의한 융점상승현상을 저하시키기 위하여 40-60%의 범위로 사용하였으며 물유리는 도포제의 용융을 촉진코져 20-30% 범위로 첨가하였다. 인상흑연(C)은 고온에서 도포막의 강도유지를 위해서 2-5%의 범위내에서 첨가하고, 강력한 탈산제인 Fe-Si는 인상흑연의 산화를 방지도포성능을 보강키 위한 것으로서 2-5%의 범위에서 사용한다. 한편 상기한 각 성분의 원료는 모두 200매쉬(mesh) 이하의 입도로 하여, 도포제와 물의 비율이 50 : 50이 되게 혼합한 후 정반과 강괴가 접하는 부분에, 건조후 도포층의 두께가 2-3mm 정도가 되게 시공하는 것이 바람직하다.In the present invention, the blast furnace slag is easily melted as a material that was primarily melted, but in order to reduce the influence of high melting point materials such as CaO and MgO in the slag, it is set to 10-15%. Soda feldspar (Na 2 O · 6SiO 2 · Al 2 O 3 ) was used in the range of 40-60% to reduce melting point increase by CaO and MgO in blast furnace slag. Water glass promotes melting of coating agent. Add in 30% range. Impression graphite (C) is added in the range of 2-5% in order to maintain the strength of the coating film at high temperature, and Fe-Si, a powerful deoxidizer, is used to reinforce the coating performance to prevent oxidation of the impression graphite. Use in the range. On the other hand, the raw materials of the above-mentioned components are all 200 particles (mesh) or less in particle size, so that the ratio of the coating agent and water is 50:50, and then the contact layer is in contact with the steel plate. It is preferable to construct it to about 3 mm.
이하 본 발명의 실시예에 대하여 설명하기로 한다. 17톤 강괴를 제조하는데 있어서 도표 1과 같은 조성의 본 발명의 도포제와 종래의 도포제를 정반연와 주변에 각각 2.5mm 두께로 도포한 후 강괴부착 발생율 및 정반의 수명을 측정하였다.Hereinafter, embodiments of the present invention will be described. In the production of 17-ton ingots, the coating agent of the present invention and the conventional coating agent of the composition as shown in Table 1 were applied to the platen and the periphery of 2.5 mm thick, respectively, and the incidence of ingot adhesion and the platen life were measured.
[도표 1][Figure 1]
상기와 같이 본 발명에 의한 도포제를 사용함으로써 강괴부착율은 종래 도포제에 비하여 훨씬 감소됨을 알 수 있고 시공 후 정반수명 역시 종래 도포제를 사용했을 경우보다 거의 2배 정도 향상됨을 알 수 있는 것이다. 또한 본 발명의 도포제는 고로슬래그의 폐기물을 활용하는 효과도 가진다.By using the coating agent according to the present invention as described above it can be seen that the ingot adhesion rate is much reduced compared to the conventional coating agent and the plate life after the construction is also nearly two times improved than when using the conventional coating agent. In addition, the coating agent of the present invention has the effect of utilizing the blast furnace slag waste.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019840008538A KR880000740B1 (en) | 1984-12-29 | 1984-12-29 | Mould boards used coating the surfaces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019840008538A KR880000740B1 (en) | 1984-12-29 | 1984-12-29 | Mould boards used coating the surfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860004670A KR860004670A (en) | 1986-07-11 |
| KR880000740B1 true KR880000740B1 (en) | 1988-05-04 |
Family
ID=19236947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019840008538A KR880000740B1 (en) | 1984-12-29 | 1984-12-29 | Mould boards used coating the surfaces |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR880000740B1 (en) |
-
1984
- 1984-12-29 KR KR1019840008538A patent/KR880000740B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR860004670A (en) | 1986-07-11 |
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