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1. 发明专利

CA1230974A PROCESS FOR REFINING OF CHROMIUM-CONTAINING MOLTEN STEEL 未知
公开(公告)号：CA1230974A
公开(公告)日：1988-01-05
申请号：CA463862
申请日：1984-09-24
申请人： NIPPON STEEL CORP
发明人： IKEHARA YASUNOBU , ARIYOSHI HARUKI , HIDAKA RYOICHI
IPC分类号： C21C7/00 , C21C5/00 , C21C7/064 , C21C7/068 , C21C7/076
摘要： The refining of chromium-containing molten steel by the treatments of decarburization, reduction, and desulfurization is improved in terms of consumption of argon gas used for blowing molten steel, amount of refractories of the AOD furnace, and CaO and CaF2, etc. by a process which comprises adding to the slag existing after completion of the decarburization, metallic Al as a reducing agent and CaO as a slag-forming agent respectively in amounts necessary for the slag, after completion of the subsequent reduction, to acquire a SiO2 content of not more than 10% and a CaO/Al2O3 ratio in the range of 0.8 to 2.0 thereby enabling the treatments of reduction and desulfurization to proceed simultaneously.

2. 发明专利

JP2003159764A RESIN-COMPOSITE TYPE STAINLESS DAMPING STEEL PLATE FOR PRECISION MACHINERY COVER EXCELLENT IN CONTAMINATION RESISTANCE 审中-公开
公开(公告)号：JP2003159764A
公开(公告)日：2003-06-03
申请号：JP2001393410
申请日：2001-12-26
申请人： NIPPON STEEL CORP
发明人： KADOWAKI NOBUO , MATSUDA RYOICHI , KOMORI TADASHI , ARIYOSHI HARUKI , OMURA KEIICHI
IPC分类号： F16F15/02 , B32B15/08 , C23C22/24 , C23C22/30 , C23C22/50 , G11B33/08
摘要： PROBLEM TO BE SOLVED: To provide a resin-composite type stainless damping steel plate excellent in contamination resistance capable of satisfying various properties simultaneously which are required for a case cover of precision electronic products. SOLUTION: In the resin-composite type stainless damping steel plate for precision machinery cover which is obtained by laminating stainless steel plates via a viscoelastic resin, at least the surface of the inside of the precision machinery cover has no fine grain boundary grooves along the grain boundary, the side of the stainless steel plate surface which is bounded to the viscoelastic resin is applied with either a chromate treatment, a non-chromate treatment, a silan coupling agent treatment or a primer treatment. The surface finish of the stainless steel plate is dull finished on the external surface side of the precision machinery cover. As the viscoelastic resin, a thermosetting amorphous polyester-based resin which contains the proportion of nickel particles and/or 1 to 30 wt.% stainless particles of the resin is used. COPYRIGHT: (C)2003,JPO

3. 发明专利

JPS59104421A Decarburization of chromium-containing molten steel 失效
标题翻译：包含铬的钢的脱碳
公开(公告)号：JPS59104421A
公开(公告)日：1984-06-16
申请号：JP21207682
申请日：1982-12-04
申请人： Nippon Steel Corp
发明人： IKEHARA YASUMASA , ARIYOSHI HARUKI , TAKANO HIRONORI
IPC分类号： C21C7/00 , C21C7/068
CPC分类号： C21C7/0685
摘要： PURPOSE:To eliminate problems such as decrease of decarburizing speed, the oxidation of a metal or the like, in a decarburizing process by blowing O2-gas and dilution gas into molten steel, by specifying the blow-in condition of the aforementioned both gases in three regions due to the C-content in the molten steel. CONSTITUTION:In a decarburizing process by blowing protective gas and a gaseous mixture of O2-gas and dilution gas into molten steel from the outer and the inner pipes of a double pipe tuyere, the C-content in the molten steel divided into three regions, that is, a region of up to 0.7%, a region to 0.05-0.25% from 0.7% and a region to up to a final C-value from 0.25-0.05%. In this state only the O2-gas, a gaseous mixture continuously changed in the ratio of the O2-gas and the dilution gas corresponding to the C-content and only the dilution gas are successively and respectively blown into the molten steel in these regions from the inner pipe. By this method, the conservation of a required reducing agent, shortening of a reduction time, prevention of the molten loss of a refractory material and enhancing effect of refining efficiency are obtained.
摘要翻译：目的：为了消除脱碳速度降低，金属氧化等问题，在通过将O2气体和稀释气体吹入钢水的脱碳工序中，通过规定上述两种气体的吹入条件三个区域由于钢水中的C含量。构成：在双管风口的外管和内管将吹入保护气体和O 2气体和稀释气体的气体混合物进入钢水的脱碳过程中，钢水中的C含量分为三个区域，即高达0.7％的区域，从0.7％到0.05-0.25％的区域，从0.25-0.05％到最终C值的区域。在这种状态下，只有O2气体，气体混合物在与C含量对应的O 2气体和稀释气体的比例上连续变化，并且仅稀释气体依次分别从这些区域吹入钢水中内管。通过这种方法，可以获得所需的还原剂的保存，缩短时间的缩短，防止耐火材料的熔融损失，提高精制效率的效果。

4. 发明专利

JPS61281805A METHOD FOR ANALYZING COMPOSITION OF MOLTEN STEEL WITH MOLTEN STEEL DUST 失效
公开(公告)号：JPS61281805A
公开(公告)日：1986-12-12
申请号：JP12390885
申请日：1985-06-07
申请人： NIPPON STEEL CORP
发明人： ARIYOSHI HARUKI , MORISHIGE HIROAKI , TSUCHIDA HIDENORI
IPC分类号： C21C5/46 , G01N33/20
摘要： PURPOSE:To properly change over the ratio of gaseous O2/Ar during refining under agitation by analyzing molten steel dust produced in a refining furnace during refining and by estimating the composition of molten steel from the established relation between the analyzed values of molten steel dust and the composition of molten steel. CONSTITUTION:A lance 2 for sampling is put in a refining furnace 1 from the top during refining under agitation, and dust generated in the furnace 1 is sampled by suction with a recuperator 3. Only molten steel dust is separated from the sampled dust by magnetic separation or other method, sent to an analyzer 4 and analyzed. The composition of molten steel is estimated from the established relation between the analyzed values of molten steel dust and the composition of molten steel.

5. 发明专利

JPS5950113A Refining method of chromium steel 失效
标题翻译：铬钢精炼方法
公开(公告)号：JPS5950113A
公开(公告)日：1984-03-23
申请号：JP16057082
申请日：1982-09-14
申请人： Nippon Steel Corp
发明人： IKEHARA YASUMASA , ARIYOSHI HARUKI , HINO TOORU
IPC分类号： C21C7/00 , C21C5/00 , C21C5/28 , C21C7/064 , C21C7/068 , C22C33/04
CPC分类号： C21C5/005
摘要： PURPOSE:To improve the refining efficiency of Cr steel owing to a considerable reduction in a reduction desulfurization period by adding more than half of a slag making agent to the steel in the final period of decarburization, adding the remaining agent and a reducing agent upon ending of the decarburization, blowing an inert gas to the steel and tapping the steel within a prescribed time. CONSTITUTION:>=50% Slag making agent is dividedly charged to Cr steel in the final period of decarburization, i.e. the 4th period shown in the figure in decarburization and reduction refining of said steel. The remaining slag making agent and a reducing agent are added upon ending of the decarburization, and an inert gas is blown. The slag making agent charged in the 4th period is dried and dehydrated by the heat of the molten steel. The reducing agent and the remaining slag making agent the added upon ending of the decarburization and the steel is tapped. The tapping is accomplished within 3min and the problem that may arise in the hydrogen remaining in the molten steel after tapping is eliminated by the above-mentioned dehydration treatment. The relation between the slag basicity at the end of the decarburization and the yield of Cr is as shown in the figure and when the basicity thereof is kept at
摘要翻译：目的：为了提高Cr钢的精炼效率，由于在脱碳最后期间通过在钢中加入一半以上的造渣剂，减少脱硫时间大大减少，在剩余的试剂和还原剂终止后加入脱碳，向钢中吹入惰性气体，并在规定的时间内对钢进行攻丝。构成：> = 50％在脱碳的最后期间，即所述钢的脱碳和还原精炼中，图4所示的第4期，将渣渣制剂分批装入Cr钢。在脱碳结束时加入剩余的造渣剂和还原剂，吹入惰性气体。在第四期间装入的造渣剂通过钢水的热量干燥脱水。还原剂和剩余的造渣剂在脱碳结束时加入，并且钢被敲击。攻丝在3分钟内完成，并且通过上述脱水处理消除了在攻丝之后留在钢水中的氢气中可能出现的问题。脱碳结束时的渣碱度与Cr的收率之间的关系如图所示，当碱度保持在<= 5时，Cr的回收率稳定在高水平。

6. 发明专利

JPS6352756A SUBMERGED NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPS6352756A
公开(公告)日：1988-03-05
申请号：JP19396186
申请日：1986-08-21
申请人： NIPPON STEEL CORP
发明人： YANAI TAKASHI , TSUCHIDA HIDENORI , ARIYOSHI HARUKI
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To favorably bring the discharging flow of molten metal into contact with mold powder and to reduce the wave on the surface of molten metal by arranging the discharging hole at both side faces near the closed bottom part of submerged nozzle and constructing the discharging hole by the specific shape. CONSTITUTION:The discharging hole 7 for the molten metal is arranged at both side faces near the closing bottom part 4 of submerged nozzle 1 for continuous casting and the molten metal is poured into a mold 10 through a hole 7. The upper face 8 of this hole 7 is inclined to upward toward outer side and the lower face 9 is horizontally or inclined to upward toward outer side, and in case of using theta1 for angle of the upper face 8 to the horizontal direction and theta2 for angle of the lower face 9 to the horizontal direction, the discharging hole is provided under conditions that theta1 is larger than theta3 and height D at the outside is larger than height (d) at the inside for the hole 7. Further, hole area S0 at the outside is to provide to larger than hole area S1 at the inside fo. the discharging hole 7 and a widened angle theta3 in the hole 7 is provided. Further, in case of using (h) for depth from the molten surface in the mold 10 to the upper end of outside for the hole 7 and L for distance from the side face of the nozzle 1 to the side wall of mold 10, it is desirable to be theta1>tan . h/L > theta2. 3 : mold powder.

7. 发明专利

JPS60121211A METHOD FOR REDUCING AND DESULFURIZING MOLTEN CR STEEL 失效
公开(公告)号：JPS60121211A
公开(公告)日：1985-06-28
申请号：JP22788783
申请日：1983-12-02
申请人： NIPPON STEEL CORP
发明人： IKEHARA YASUMASA , ARIYOSHI HARUKI , HIDAKA RIYOUICHI
IPC分类号： C21C7/00 , C21C5/00 , C21C7/064 , C21C7/068 , C21C7/076
摘要： PURPOSE:To reduce and desulfurize efficiently molten Cr steel by adding Al and CaO to the steel in the final stage of decarburization and blowing gaseous Ar so as to adjust the amounts of SiO2, CaO and Al2O3 in slag to prescribed percentages. CONSTITUTION:When molten Cr steel is refined, metallic Al and CaO as a slag forming agent are added to the steel in the final stage of decarburization, and gaseous Ar is blown to agitate the steel and slag. The amount of SiO2 in the slag is adjusted to

8. 发明专利

JPS5896812A REFINING METHOD BY DECARBURIZATION 失效
公开(公告)号：JPS5896812A
公开(公告)日：1983-06-09
申请号：JP19279781
申请日：1981-12-02
申请人： NIPPON STEEL CORP
发明人： IKEHARA YASUMASA , ARIYOSHI HARUKI
IPC分类号： C21C7/072 , C21C5/35 , C21C7/00
摘要： PURPOSE:To reduce the partial pressure of CO in a vapor phase part and to improve decarburization efficiency in a dilute decarburization method by blowing the diluting gas of a specific ratio of the content of gaseous oxygen to be blown into molten steel into the vapor phase in a furnace. CONSTITUTION:In the stage of dilute decarburization of steel, a diluting gas such as N2 and Ar or air at >=20% bottom blowing oxygen is blown from a furnace top into a vapor phase part in a decarburization period. Then decarburization efficiency is improved, and the time of the decarburization period and the unit of a reducing agent are decreased. In this method, if the % of Si which is a slag forming element is regulated to

9. 发明专利

JPS57188611A REFINING METHOD FOR NICKEL STAINLESS STEEL 失效
公开(公告)号：JPS57188611A
公开(公告)日：1982-11-19
申请号：JP7140581
申请日：1981-05-14
申请人： NIPPON STEEL CORP
发明人： IKEHARA YASUMASA , ARIYOSHI HARUKI , KATAYAMA HIROYUKI , KUWABARA MASATOSHI
IPC分类号： C21C7/00 , C22C33/04
摘要： PURPOSE:To obtain Ni-containing stainless steel at low cost by charging a formed body of NiO powder and a carbonaceous material in a container lined with refractories after steel is taken out and adding a molten steel containing relatively large amount of carbon after reducing said NiO partially. CONSTITUTION:With NiO powder obtained from an Ni mat by oxidation and roasting, etc., >=5%, more preferably 5-15% carbonaceous material (e.g. pulverized coal) is mixed additionally, thus obtaining a formed body. This formed body is charged in a container lined with refractories after molten steel is taken out and preheated to reduce >=20%, more preferably >=40% NiO. In this state, molten steel containing >=0.6wt% C is charged to meet an Ni component into the molten steel, and unreduced NiO is reduced with C in the molten steel, thereby refining desired Ni stainless steel. The surface temperature of the refractories right after the steel is taken out is >=1,300 deg.C, and this radiated heat is used for partial reduction of NiO and recovered and utilization effectively. Further, the Ni component is melted into the molten steel at high yield.

10. 发明专利

JP2003205576A COMPOSITE RESIN TYPE STAINLESS STEEL DAMPING SHEET, AND PRESS-MOLDED PRODUCT AND CASE COVER FOR HARD DISK DRIVE USING THE DAMPING SHEET 审中-公开
公开(公告)号：JP2003205576A
公开(公告)日：2003-07-22
申请号：JP2001393409
申请日：2001-12-26
申请人： NIPPON STEEL CORP
发明人： KADOWAKI NOBUO , MATSUDA RYOICHI , KOMORI TADASHI , ARIYOSHI HARUKI , OMURA KEIICHI
IPC分类号： B32B15/08 , G11B25/04 , G11B33/08
摘要： PROBLEM TO BE SOLVED: To provide a composite resin type stainless steel damping sheet which achieves the compatibility between the required anticontamination properties of the interior of precision equipment and the appearance quality level of a cover, and a press-molded product and a case cover for a hard disc drive using the damping sheet. SOLUTION: In the composite resin type stainless steel damping sheet used for molding covers for precision equipment obtained by laminating stainless steel sheets through a viscoelastic resin, the surface roughness Ra of the stainless steel sheet to the laminated on at least the inner face side, is set to be 0.045 μm or less and the surface roughness Ra of the stainless steel sheet to be laminated on the outer face side is set to be 0.07 μm or more. The press- molded product or the case cover for a hard disc drive is manufactured using the composite resin type stainless steel damping sheet. COPYRIGHT: (C)2003,JPO

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