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1. 发明专利

JPS59144557A Production of composite metallic cast ingot 失效
标题翻译：复合金属铸件的生产
公开(公告)号：JPS59144557A
公开(公告)日：1984-08-18
申请号：JP1859183
申请日：1983-02-07
申请人： Sumitomo Metal Ind Ltd
发明人： ODA KAZUHIKO
IPC分类号： B22D19/16 , B22D7/02
CPC分类号： B22D7/02
摘要： PURPOSE:To produce easily, safely and surely a composite metallic cast ingot having high quality by coating preliminarily an oxidation preventive agent which is evaporated by the heat of a molten metal on the surface of a cladding material, covering the coated surface thereof with a cover of a material to be expanded by the molten metal and casting the molten metal into a casting mold. CONSTITUTION:An oxidation preventive agent 2 of NH4BF4, etc. which is evaporated by the heat of a molten metal is coated on the surface of a cladding material 1 and the coated surface is covered via a small space with a cover 3 which consistgs of a mild steel plate or the like to be expended when the plate contacts with the molten metal and is provided with a small hole 4 communicating with the outdoor air in the upper part. Such cladding material is set in a casting mold 5. The molten metal is then charged through the charging hole 7 of a base plate 6. As the molten metal surface rises, the molten metal erodes the cover 3 and enters the inside thereof to evaporate the material 2, thereby forming a reducing atmosphere and blowing away scum 9. If the molten metal is cast at the speed at which the air pressure in the cover 3 is maintained higher by 0.002-1.0atm than the outdoor air pressure, the composite metallic cast ingot having a good adhesive state without any inclusion defect at the clad boundary is surely obtd.
摘要翻译：目的：通过预先涂覆由熔融金属的热量在包覆材料的表面蒸发的氧化防止剂，容易，安全，可靠地制造具有高质量的复合金属铸锭，用覆盖物覆盖其涂覆表面通过熔融金属膨胀的材料并将熔融金属浇注到铸模中。构成：通过熔融金属的热量蒸发的NH4BF4等的氧化防止剂2涂覆在包层材料1的表面上，并且涂覆的表面通过小的空间覆盖，盖3由当钢板与熔融金属接触时要消耗的低碳钢板等，并且在上部设置有与室外空气连通的小孔4。这样的包层材料被放置在铸模5中。然后通过基板6的充电孔7将熔融金属充入。当熔融金属表面上升时，熔融金属侵蚀盖3并进入其内部以蒸发材料2，从而形成还原气氛并吹走浮渣9.如果熔融金属以保持在盖3中的空气压力比室外空气压力高0.002-1.0atm的速度铸造，则复合金属铸件在包层边界处没有任何夹杂缺陷的具有良好粘附状态的锭是可靠的。

2. 发明专利

JPS5950182A Removing method of al melt-sprayed film 失效
标题翻译：铝喷涂膜的去除方法
公开(公告)号：JPS5950182A
公开(公告)日：1984-03-23
申请号：JP16060082
申请日：1982-09-13
申请人： Sumitomo Metal Ind Ltd
发明人： ODA KAZUHIKO , SUZUKI HIROYUKI
IPC分类号： C23F1/36 , C23F1/44
CPC分类号： C23F1/36 , C23F1/44
摘要： PURPOSE: To improve efficiency and safety and to enable the removal of an Al melt-sprayed film at a low cost by performing said removal by a chemical treatment in place of mechanical grinding.
CONSTITUTION: An aq. NaOH soln. is coated on an Al melt-sprayed steel plate and is brought into reaction with Al to form sodium aluminate in the case of removing only the Al melt sprayed film in the specified range near the weld line of said steel plate. The Al melt-sprayed film which is hardly strippable is converted to the above-described Al compd. which is easily strippable, then said compd. can be removed by, for example, washing. However, the aq. NaOH soln. when coated in this case spreads to the outside of the specified range. Thereupon, the aq. NaOH soln. incorporated with 0.5W3.0wt% α-starch to have viscosity is coated thereon. Such aq. soln. flows after coating and the coated range expands slightly but the flowing range is uniform and can be predicted and limited with respect to a specified coated amt., because the liquid surface dries to hardness and the liquid is internally agitated by foaming, by which the reaction with the Al is effectively accelerated.
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：为了提高效率和安全性，通过化学处理代替机械研磨，可以以低成本除去Al熔喷膜。构成： NaOH溶液涂覆在Al熔喷钢板上，并且在仅在所述钢板的焊接线附近的特定范围内除去Al熔喷膜的情况下，与Al反应形成铝酸钠。几乎不可剥离的Al熔喷膜被转化为上述Al组分。这是容易剥离，然后说compd。可以通过例如洗涤来除去。但是， NaOH溶液在这种情况下涂覆时，扩散到指定范围的外部。于是， NaOH溶液加入0.5-3.0重量％的α-淀粉以具有粘度。这样的水 SOLN。涂布后流动，涂覆范围略微膨胀，但流动范围是均匀的，并且可以相对于指定的涂层来预测和限制，因为液体表面干燥硬度，并且液体通过发泡在内部搅拌，由此反应与Al有效加速。

3. 发明专利

JPS57121853A Manufacture of composite metal ingot 失效
标题翻译：复合金属制品的制造
公开(公告)号：JPS57121853A
公开(公告)日：1982-07-29
申请号：JP17068980
申请日：1980-12-02
申请人： Sumitomo Metal Ind Ltd
发明人： SHIRAISHI HIROAKI , ODA KAZUHIKO , MATSUMOTO HIROSHI
IPC分类号： B22D19/16 , B22D7/02
CPC分类号： B22D7/02
摘要： PURPOSE:To eliminate occurrence of defects due to impurities in the boundary and defective adhesion in inserting core in a mold with charged molten metal by charging the molten metal at a specified surface rising speed after forming a borofluoride layer on the surface of the core. CONSTITUTION:After removing the oxide film from the surface of a core 1, a coating layer containing borofluorides such as NH4BF4, KBF4 is formed to a thickness of 50-1,500mum. The core 1 is placed in a mold 4, and molten steel is charged into the mold from a sprue at a surface rising speed of 200- 1,000mm./min. Consequently, the coating layer comes into contact with the molten steel 10, and the borofluoride is thermally decomposed to produce BF3 gas. This gas excludes scum on the surface of the molten metal from near the surface of the core 1, and prevents the scum dragged in the interface between the core 1 and molten steel 10. Inside of the mold 4 is filled with nonoxidizing BF3 gas, and occurrence of defects due to impurities at the boundary caused by presence of oxide is restrained. When the surface rising speed is not within aforementioned range, the object cannot be attained due to previous decomposition of the borofluoride and insufficient vaporization of a part of the coating layer.
摘要翻译：目的：为了消除由于边界上的杂质而导致的缺陷的发生，并且通过在芯的表面上形成氟硼化物层之后以特定的表面上升速度对熔融金属进行充填，从而将芯插入带有熔融金属的模具中。构成：从芯1的表面除去氧化膜后，形成含有氟化硼如NH4BF4，KBF4的涂层，厚度为50〜1500μm。将芯1放置在模具4中，并且将钢水从200-1000mm /分钟的上升速度的浇道加入到模具中。因此，涂层与钢水10接触，氟化硼热分解而产生BF 3气体。这种气体从芯体1的表面附近排出熔融金属表面的浮渣，防止浮渣在铁芯1与钢水10之间的界面中被拖曳。在模具4的内侧填充有非氧化BF 3气体，抑制由于存在氧化物引起的边界处杂质的缺陷的发生。当表面上升速度不在上述范围内时，由于氟化硼的先前分解和涂层的一部分的蒸发不充分，不能达到目的。

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