KR880001704Y1 - Ordinary light mold for high carbon steel bloom - Google Patents
Ordinary light mold for high carbon steel bloom Download PDFInfo
- Publication number
- KR880001704Y1 KR880001704Y1 KR2019840014003U KR840014003U KR880001704Y1 KR 880001704 Y1 KR880001704 Y1 KR 880001704Y1 KR 2019840014003 U KR2019840014003 U KR 2019840014003U KR 840014003 U KR840014003 U KR 840014003U KR 880001704 Y1 KR880001704 Y1 KR 880001704Y1
- Authority
- KR
- South Korea
- Prior art keywords
- mold
- taper
- segregation
- high carbon
- ordinary light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000677 High-carbon steel Inorganic materials 0.000 title description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000005204 segregation Methods 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/06—Permanent moulds for shaped castings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
내용 없음.No content.
Description
제1도는 주형의 테이퍼에 따른 최대탄소 편석지수를 나타내는 그래프.1 is a graph showing the maximum carbon segregation index according to the taper of the mold.
제2도는 본 고안의 주형의 사시도.2 is a perspective view of a mold of the present invention.
제3도는 본 고안의 주형의 종단면도.3 is a longitudinal sectional view of the mold of the present invention.
본 고안은 제강공장에서 강괴를 제조할 때 사용하는 주형(鑄型)에 관한 것으로 특히 고탄소강 브룸(Bloom)을 제조하는 데 적합한 상광형 주형(上廣型鑄型)에 관한 것이다.The present invention relates to a mold used in the manufacture of steel ingots in a steel mill, and more particularly, to an ordinary light-type mold suitable for producing a high carbon steel bloom.
강괴내에는 중심편석, V편석, 역 V편석 및 하부부편석대 등이 있으며, 중심편석은 강괴상부에 발생하는 것으로서 일차편석과 이차편석으로 분류된다.There are center segregation, V segregation, inverse V segregation and lower segregation zone in the ingot, and the central segregation occurs in the upper part of the ingot and is classified into primary segregation and secondary segregation.
일차편석은 용융금속이 응고가 진행함에 따라 밀도가 작아진 융역이 최종적으로 상부에 응고되면서 발생하는 것으로서 동일한 무게의 강괴 제조시 가능한 주형의 평균반경을 작게하여 편성정도를 감소시킬 수 있다.Primary segregation occurs when the molten metal solidifies and the compacted melt zone finally solidifies to the top, and the formation of the same weight can reduce the formation of the mold by reducing the average radius of the mold.
한편, 이차편석은 주괴상부의 브리징(Bridging)현상에 의해서 발생하고 있는데, 특히 C 0.7-0.8 중량 %의 고탄소강 브룸용 강괴제조시 중심부 상부의 탄소편석의 발생은 천재의 최종 신선시에 단선율(斷線率)을 증가 시킬 뿐만 아니라 품질저해의 요소가 되고 있다.On the other hand, secondary segregation is caused by bridging in the upper part of the ingot. Particularly, the segregation of carbon in the upper part of the center of the steel ingot for high carbon steel broth of C 0.7-0.8 wt. It not only increases 線 率) but also becomes a factor of quality deterioration.
이와 같은 이차편석의 발생원인인 브리징현상은 상광형 주형을 채택하여 압탕부로부터 브리징부에 충분한 재급탄을 실시함으로써 억제할 수가 있다. 또한, 주형의 테이퍼(Taper)를 증가시킬 수록 이차편석의 발생범위가 줄어들고 편석강도가 약해짐은 잘 알려져 있다.The bridging phenomenon, which is the cause of such secondary segregation, can be suppressed by adopting an ordinary light-type mold and applying sufficient recharging from the hot water portion to the bridging portion. In addition, it is well known that as the taper of the mold increases, the generation range of secondary segregation decreases and the segregation strength decreases.
그러나 주형의 테이퍼를 증가시킬 경우 테이퍼가 증가함에 따라 강괴의 실수율은 낮아진다. 따라서 적정한 테이퍼로 이룩된 주형이 요구되고 있으나, 현재까지 테이퍼에 대한 적정한 설정치가 제안되어 있지 않다. 따라서, 본 고안의 목적은 4-6톤의 고탄소브룸용 강괴를 제조하는데 있어서 적정한 테이퍼를 가진 상광형주형을 제공코져 하는 것으로서, 주형의 테이퍼가 5-6%로 주어진 것을 특징으로 한다.Increasing the taper of the mold, however, decreases the error rate of the steel ingot as the taper increases. Therefore, a mold with proper taper is required, but an appropriate setting value for taper has not been proposed to date. Accordingly, an object of the present invention is to provide an ordinary light-type mold having an appropriate taper in manufacturing a 4-6 ton high carbon broth ingot, characterized in that the taper of the mold is given by 5-6%.
이하 본 고안에 대하여 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail.
제2도 및 제3도는 각각 본 고안의 본주형의 단면도 및 종단면도로서 1은 주형벽이고 D1및 D2는 각각 주형의 상부직경 및 하부직경, D는 주형평균직경(), H는 주형의 높이를 나타낸다.2 and 3 are cross-sectional and longitudinal cross-sectional views of the main mold of the present invention, where 1 is the mold wall, D 1 and D 2 are the upper and lower diameters of the mold, respectively, and D is the average mold diameter ( ), H represents the height of the mold.
제1도는 주형의 테이퍼에 따른 최대탄소 편석지수에 대한 실험결과를 나타낸 그래프로서, 테이퍼가 증가됨에 따라서 최대탄소 편석지수는 감소화되 4-5%의 범위에서는 일정하게 유지됨을 알 수 있다. 여기서 테이퍼는 다음과 같이 표시된다.FIG. 1 is a graph showing the experimental results of the maximum carbon segregation index according to the taper of the mold. As the taper increases, the maximum carbon segregation index decreases and remains constant in the range of 4-5%. Where the taper is represented as
테이퍼(Taper)=(D1-D2)/Hx100Taper = (D 1 -D 2 ) / Hx100
한편 4% 테이퍼의 주형과 5%테이퍼의 주형으로 탄소함량이 0.7-0.8 중량 %인 강괴를 각각 제조한후, 강괴의 이차편석분포지역을 분석한 결과 5% 테이퍼의 경우에는 20-25%, 5%테이퍼의 경우는 15-20%가 됨을 알 수 있었다. 따라서 최대 이차편석지수를 감소시키면서 편석분포지역도 적게 하기 위해서는 주형의 테이퍼를 5%이상으로 해야함을 알 수 있다.On the other hand, after ingots with carbon content of 0.7-0.8% by weight were formed using 4% taper molds and 5% taper molds, the secondary segregation area of the steel ingots was analyzed. The 5% taper was found to be 15-20%. Therefore, in order to reduce the maximum secondary segregation index and reduce the segregation distribution area, it can be seen that the taper of the mold should be 5% or more.
그리고 테이퍼가 증가할 수록 분괴압연의 실수율이 감소하기 때문에 본 고안에 있어서는 테이퍼를 6% 미만으로 제한하였다.In addition, the taper was limited to less than 6% in the present invention because the error rate of the rolling was decreased as the taper increased.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840014003U KR880001704Y1 (en) | 1984-12-26 | 1984-12-26 | Ordinary light mold for high carbon steel bloom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019840014003U KR880001704Y1 (en) | 1984-12-26 | 1984-12-26 | Ordinary light mold for high carbon steel bloom |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR860007427U KR860007427U (en) | 1986-07-12 |
| KR880001704Y1 true KR880001704Y1 (en) | 1988-05-06 |
Family
ID=19238983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019840014003U Expired KR880001704Y1 (en) | 1984-12-26 | 1984-12-26 | Ordinary light mold for high carbon steel bloom |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR880001704Y1 (en) |
-
1984
- 1984-12-26 KR KR2019840014003U patent/KR880001704Y1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR860007427U (en) | 1986-07-12 |
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| Date | Code | Title | Description |
|---|---|---|---|
| A201 | Request for examination | ||
| UA0108 | Application for utility model registration |
Comment text: Application for Utility Model Registration Patent event code: UA01011R08D Patent event date: 19841226 |
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| UA0201 | Request for examination |
Patent event date: 19841226 Patent event code: UA02012R01D Comment text: Request for Examination of Application |
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| UG1501 | Laying open of application | ||
| UG1604 | Publication of application |
Patent event code: UG16041S01I Comment text: Decision on Publication of Application Patent event date: 19880404 |
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| E701 | Decision to grant or registration of patent right | ||
| UE0701 | Decision of registration |
Patent event date: 19880718 Comment text: Decision to Grant Registration Patent event code: UE07011S01D |
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| REGI | Registration of establishment | ||
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