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1. 发明专利

JPH01177306A MANUFACTURE OF IRON POWDER 失效
公开(公告)号：JPH01177306A
公开(公告)日：1989-07-13
申请号：JP118688
申请日：1988-01-08
申请人： NIPPON STEEL CORP
发明人： OBARA MITSURU , SATO YUKIO , OKA ISAO , MEGURO MASARU , KOMAGINE ROKURO , ITO ISAO , ISHIMARU MASAHIRO , SUZUKI KIYOSHI
IPC分类号： B02C21/00 , B22F9/04
摘要： PURPOSE:To obtain semi-cast iron particles, which can optionally select iron content, etc., at low cost by again decarbonizing under the prescribed condition after crushing raw particle iron for raw material decarbonized at first time and decarbonizing at secondary time with magnetic concentration, to remove fine particle carbon in the raw material. CONSTITUTION:The raw material is dried and blast-dressed and kish graphite and graphite slag generated at the time of molten iron treatment or iron casting, to obtain the raw particle iron. This raw particle iron decarbonized at the first time is crushed and deformed as plate-shape and after developing multiple cracks, the graphite slag having non-magnetic body is removed with magnetic concn. Successively, the powder decarbonized at the secondary time is recrushed and the third decarbonization is executed with blast classification and further the classification is executed. Then, mixing, stirring and blast-dressing are executed at the same time and the fourth decarbonization is executed, to remove the fine particle carbon in the raw material.

2. 发明专利

JPS62282752A SIMULATION METHOD FOR FINDING OPTIMUM DESIGNING VALUE CAST IRON FOR HORIZONTAL CONTINUOUS CASTER 失效
公开(公告)号：JPS62282752A
公开(公告)日：1987-12-08
申请号：JP12505486
申请日：1986-05-30
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , TANIFUJI MINORU , SUZUKI KIYOSHI
IPC分类号： B22D11/04
摘要： PURPOSE:To simply presume designing values of composition and shape conforming to the actual operation by simulating solidifying condition of a cast iron billet at the time of executing horizontal continuous casting by detaching time from a testing mold. CONSTITUTION:At the time of executing the horizontal continuous casting for the cast iron, by using the testing mold having the same size in accordance with the casting sectional shape, after casting the molten casting iron into the mold, the detaching time from the testing mold without breakout is found. Next, under this condition, the mold is detached as changing Si/C ratio and corner radius of the cast billet, and the model table is made by plural testing data. In succession, the aimed composition values and the corner radius value developing no chilling structure at the actual operation are presumed based on this model table. In this way, the presumption for the designing values of composition and shape conforming to the actual operation is simply executed.

3. 发明专利

JPS58192663A Horizontal and continuous casting method of cast iron 失效
标题翻译：铸铁的水平连续铸造方法
公开(公告)号：JPS58192663A
公开(公告)日：1983-11-10
申请号：JP7575482
申请日：1982-05-06
申请人： Nippon Steel Corp
发明人： MEGURO MASARU , KODAMA JIYUNICHI , OKA ISAO , SUZUKI KIYOSHI , KIMURA EIICHI
IPC分类号： B22D11/04
摘要： PURPOSE: To cast a homogeneous ingot which has less surface defect and uneven texture in the stage of casting an ingot wherein a flattening ratio and the length on the short side has specific values, by specifying the surface temp. and casting temp. of the ingot in the stage of drawing the same and adding a specific thrusting stroke just prior to the drawing.
CONSTITUTION: The surface temp. of an ingot in the stage of drawing is maintained at 1,000W1,040°C and the casting temp. thereof is maintained at 1,320W 1,345°C in the stage of casting the ingot wherein the ratio of the long side and short side in the sectional shape of the ingot (flattening ratio) is ≥4 and the short side is ≤25mm. A 0.3W0.5mm thrusting stroke is added just prior to the drawing in the intermittent drawing stage when the drawing is ceased. The continuous casting ingot of good quality which is about ≤1mm flow depth in the surface, has no cementite crystals at all in the surface part and about ≤3mm chill depth in the corner part in a 45°C direction is thus produced.
COPYRIGHT: (C)1983,JPO&Japio
摘要翻译：目的：通过指定表面温度，铸造在铸造阶段具有较少表面缺陷和不均匀质地的均质锭，其中扁平化比例和短边长度具有特定值。铸造温度在绘制之前加入一个特定的推进冲程。构成：表面温度在铸造阶段的锭保持在1000-1,040℃和铸造温度。在铸锭的阶段保持在1,320-1,345℃，其中锭的截面形状中的长边和短边的比例（扁平化率）为> = 4，短边为<= 25mm ..一个0.3-0.5mm。当绘图停止时，在间歇绘制阶段的绘制之前加入推进行程。质量好的连铸锭大约<= 1mm。表面流动深度在表面部分完全没有渗碳体晶体，约<= 3mm。因此产生45度方向的角部的冷却深度。

4. 发明专利

JPS5239510A METHOD OF OPERATING SOAKING PITS 失效
公开(公告)号：JPS5239510A
公开(公告)日：1977-03-26
申请号：JP11586075
申请日：1975-09-25
申请人： NIPPON STEEL CORP
发明人： SUZUKI KIYOSHI , NAKAMURA YASUHIRO , SUETSUGI RIYOUJI , YONEYAMA MITSUNOBU
IPC分类号： C21D1/52 , C21D9/00 , C21D9/70
摘要： PURPOSE:Reduction in original unit of fuel is achieved without reducing heating efficiency.

5. 发明专利

JPS62196313A MANUFACTURE OF HIGH-SILICON PIG IRON 失效
公开(公告)号：JPS62196313A
公开(公告)日：1987-08-29
申请号：JP3508486
申请日：1986-02-21
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , SUZUKI KIYOSHI
IPC分类号： C21C1/08
摘要： PURPOSE:To obtain high-silicon pig iron with an existing apparatus for pretreating molten pig iron in a high yield of a siliconizing agent by decarburizing molten pig iron discharged from a blast furnace by the amount of carbon corresponding to a surplus by siliconization, raising the temp. of the molten pig iron with the resulting carbon as a heat source and siliconizing the molten pig iron. CONSTITUTION:Molten pig iron discharged from a blast furnace is decarburized by oxidation to the amount of carbon equilibrating silicon after siliconization to crystallize carbon, the temp. of the molten pig iron is raised with the crystallized carbon as a heat source and then the molten pig iron is siliconized. Since the amount of carbon is regulated, when molten Fe-Si or powdery Fe-Si is added and agitated, the yield is enhanced. Even when >=about 5% Si is added, Fe-Si is perfectly melted and high-silicon pig iron is obtd. at a low cost.

6. 发明专利

JPS61223649A METHOD FOR ESTIMATING QUICKLY COMPONENT OF BLAST FURNACE PIG IRON 失效
公开(公告)号：JPS61223649A
公开(公告)日：1986-10-04
申请号：JP6389885
申请日：1985-03-29
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , TANIFUJI MINORU , SUZUKI KIYOSHI
IPC分类号： C21B7/24 , G01N33/20
摘要： PURPOSE:To estimate and predict pig iron components in a short period with a high precision by sampling directly a hot metal from a basin part in a blast furnace before tapping the pig iron and analyzing the sampled hot metal and estimating the pig iron components in accordance with analysis values. CONSTITUTION:A sample picking tuyere 1 of the blast furnace is provided bear a blast tuyere 2, and normally, a part of hot blast is branched to a path 8 and is fed to the tuyere 1 to prevent the tuyere from being blocked. A sampler 3 is inserted to the tuyere 1 and is brought closely into contact with a sampler holder 4. A tuyere valve 5 is opened to insert the sampler 3 to the furnace bottom. With respect to the sampler 3, a steel pipe has ends closed and a hole 6 is opened in a proper position and is sealed up with a wooden cock 7. When the sampler 3 is put into the hot metal, the wooden cock 7 is burnt, and the hot metal is charged into the sample 3 and is solidified. This iron is cut together with the pipe and is analyzed. Thus, pig iron components are estimated and predicted in a short period with a high precision.

7. 发明专利

JPS61223115A METHOD FOR ADDING COMPOSITION REGULATING AGENT TO MOLTEN PIG IRON 失效
公开(公告)号：JPS61223115A
公开(公告)日：1986-10-03
申请号：JP6389985
申请日：1985-03-29
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , TANIFUJI MINORU , SUZUKI KIYOSHI
IPC分类号： C21C1/08
摘要： PURPOSE:To add a composition regulating agent to molten pig iron in a high yield by agitating the molten pig iron to produce a flow, putting an obstacle in the flow, and adding the regulating agent to a turbulent flow produced behind the obstacle. CONSTITUTION:Molten pig iron 5 in a ladle 1 is mechanically agitated with an impeller 2 to produce a flow in the direction of arrows. An obstacle 3 is put in the flow of the molten pig iron 5 to produce a turbulent flow 4 behind the obstacle 3, and an alloy or a treating agent is added to the part 4 behind the obstacle 3. It is preferable that the obstacle 3 is composed of two flat plates having

8. 发明专利

JPS61159509A PREHEATING AND ADDING METHOD OF COMPONENT ADJUSTING MATERIAL FOR MOLTEN IRON 失效
公开(公告)号：JPS61159509A
公开(公告)日：1986-07-19
申请号：JP27913384
申请日：1984-12-29
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , SUZUKI KIYOSHI
IPC分类号： C21C1/08 , C21C1/00
摘要： PURPOSE:To increase the dissolving amt. of a component adjusting material and to improve economically the yield thereof by preheating the component adjusting material by the radiation heat of a molten iron under tapping and adding said material into the molten iron. CONSTITUTION:An additive alloy guide pipe 6 is disposed to the inside of a cover 5 provided above a molten iron spout 2 and a tilting spout 3 so as to run along the spout 2 and to face the molten iron 1 flowing downward in the spout 2 and the additive alloy which is the component adjusting material to be introduced through an additive alloy feed port 8 is added through such pipe into the molten iron 1 in the stage of receiving the tapped iron 1 through the above-mentioned spouts into a molten iron pan 4. The additive alloy is preheated by the radiation heat of the molten iron 1 during the down flow in the pipe 6 and is added to the molten iron 1 on the spout 2. The additive alloy is mixed and stirred during the successive inflow into the spout 3 and the pan 4 and is thereby efficiently dissolved into the molten iron 1. The further additional preheating of the additive alloy from the inside of the pipe 6 is made possible by the construction in which the above-mentioned radiation heat is sucked and passed through the pipe 6 and a duct 7.

9. 发明专利

JPS58193308A Horizontal continuous casting method of cast iron 失效
标题翻译：铸铁水平连续铸造方法
公开(公告)号：JPS58193308A
公开(公告)日：1983-11-11
申请号：JP7575382
申请日：1982-05-06
申请人： Nippon Steel Corp
发明人： MEGURO MASARU , KODAMA JIYUNICHI , OKA ISAO , ITOU ISAO , SUZUKI KIYOSHI
IPC分类号： B22D11/04 , B22D11/10 , B22D11/108 , C21C1/08 , C21C1/10
CPC分类号： C21C1/10
摘要： PURPOSE:To prepare a thin cast iron piece reduced in surface defect and structural irregularity and having good quality, by a method wherein a Sc value, a Si amount, a S amount and a Mn amount in chemical components are specified and molten iron having a seed charge such as an Fe-Si alloy inoculated therein within a laddle is subjected to horizontal continuous casting. CONSTITUTION:In the chemical components of molten iron to be subjected to continuous casting, a Sc value is adjusted to 0.99-1.08%, Si to 3.1-3.3%, S to 0.020-0.060% and Mn to S%X1.7divided by 0.3% while a seed charge such as a Fe-Si alloy or a Ca-Si alloy based on Si is innoculated in the above mentioned molten iron within a laddle to prepare a cast iron piece having a cross area shape wherein the ratio of a long side to a short side (a flatness ratio) is 4 or more and the length of the short side is 25mm. or less according to a horizontal continuous casting method. By this method, a cast iron plate completely free from a cementite crystal in the corner part and the end surface part thereof, having a chill depth of about 3mm. or less at the corner part thereof in a 45 deg. direction, reduced in defect and having good quality can be obtained.
摘要翻译：目的：为了制备表面缺陷和结构不规则并且质量好的薄铸铁件，通过其中规定了Sc值，Si量，S量和Mn量在化学成分中的方法，并且具有在鞍座内接种的Fe-Si合金等种子装料进行水平连续铸造。构成：在连续铸造的铁水的化学成分中，Sc值调整为0.99-1.08％，Si为3.1-3.3％，S为0.020-0.060％，Mn为S％X1.7，除以0.3 ％，而在鞍座内的上述铁水中接合诸如Fe-Si合金或基于Si的Ca-Si合金的种子充电被接合以制备具有横截面形状的铸铁件，其中长边短边（平坦度比）为4以上，短边的长度为25mm。或更低。通过这种方法，在角部和其端面部分中完全没有渗碳体晶体的铸铁板具有约3mm的冷却深度。或更小的角落部分。方向，缺陷减少，质量好。

10. 发明专利

JPS62164847A MANUFACTURE OF POROUS SINTERED COMPACT 失效
公开(公告)号：JPS62164847A
公开(公告)日：1987-07-21
申请号：JP628986
申请日：1986-01-17
申请人： NIPPON STEEL CORP
发明人： MEGURO MASARU , SUZUKI KIYOSHI
IPC分类号： B22F5/00 , B22F3/11 , C22C33/02
摘要： PURPOSE:To manufacture a porous, high-strength sintered compact by use of inexpensive powdered cast iron, by adding specific amounts of iron oxide and sodium aluminate solution, by mixing them, and by carrying out sintering in a reducing atmosphere in compacting and sintering a powder of graphite- containing cast iron. CONSTITUTION:Very inexpensive material such as turnings of cast iron is crushed to =3%. Then iron oxide is added by 5% to the above powder to undergo uniform blending, and further, a 20% solution of sodium aluminate is added by 3% to the above to undergo mixing. The resulting powdered cast iron is compacted into desired shape and the green compact is heated and sintered in a sintering furnace with the reducing atmosphere. The >=3% graphite powder existing as a mixture reduces, as a reducing agent, the iron oxide, and pores and minute pores are formed by evolution of reduction exhaust gas and boiling of residual sodium aluminate, so that porous, high-strength sintered compact suitable for use in oil-retaining bearings, filters, soundproof plates, etc., can be manufactured at a low cost.

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