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    • 8. 发明申请
    • METHODS FOR THE PRODUCTION OF CLAD STEEL PRODUCTS
    • 生产钢铁产品的方法
    • WO2011048363A1
    • 2011-04-28
    • PCT/GB2010/001933
    • 2010-10-19
    • CACACE, Antonino GiorgioWHITEHEAD, John Anthony Bailie
    • CACACE, Antonino Giorgio
    • B21D39/04C21D8/06B23K20/00
    • B21D39/04B23K35/004B32B15/011B32B15/015C21D8/06C22C21/00
    • A method is disclosed for forming a billet [B1-B23] comprising a core body [C, 51, 53, 55, 57, 63] of solid steel housed in a tube [J, 12, 52, 54, 58, 62] of stainless steel, nickel-chrome, nickel-copper and copper-nickel alloys. The billet can be square or round and can be hot rolled in a conventional rolling mill to form a corrosion resistant product [R, F]. Machinery [29-30, 36-40, 42-45] is disclosed for inserting the core in the tube and stretching the tube so as to exceed the elastic limit of the alloy, thereby reducing the clearance gap at the interface [Z] between the core and the tube. After the tube has been stretched, briquettes [Ea, Et, Em] of finely divided aluminium, titanium and/or magnesium are placed adjacent the interface in the tube. The tube may be closed to prevent gases outside the billet from penetrating to the interface. Before the tube reaches a temperature at the interface at which oxidation starts, the ends of the billet are heated up causing the briquettes to scavenge oxygen from the residual air at the interface. Alternatively, reliance may be placed on the briquettes to scavenge oxygen from the residual air and also from atmospheric air and furnace gases before they can penetrate to the interface. The briquettes of aluminium or magnesium [Ea, Em] melt before the billet reaches its rolling temperature and a further element [Ea] of finely divided carbon steel may then be inserted between these briquettes and the steel body to prevent the molten metal from penetrating to the interface. In an open tube, an additional element [Eu] composed of ammonium chloride or urea may be inserted between the carbon steel briquette and steel body. The additional element disassociates at a low temperature to scour residual gases out of the interface. The elements can be placed directly in the tube or in a cartridge [20, 30] which is subsequently welded to the tube.
    • 公开了一种用于形成包含容纳在管中的固体钢的芯体[C,51,53,55,57,63]的坯料[B1-B23]的方法[J,12,52,54,58,62] 的不锈钢,镍铬,镍铜和铜镍合金。 坯料可以是正方形或圆形,并且可以在常规轧机中热轧以形成耐腐蚀产品[R,F]。 公开了用于将芯插入管中并拉伸管以超过合金弹性极限的机械[29-30,36-40,42-45],从而减小了界面处的间隙间隙[Z] 核心和管子。 在管被拉伸之后,将细分的铝,钛和/或镁的压块[Ea,Et,Em]放置在管中的界面附近。 管可以封闭,以防止坯料外部的气体渗透到界面。 在管道达到氧化开始的界面处的温度之前,坯料的端部被加热,使得团块从界面处的剩余空气中清除氧气。 或者,可以依赖于团块来清除来自残余空气的氧气以及大气和炉气体在渗入界面之前。 铝或镁[Ea,Em]的团块在坯料达到其轧制温度之前熔化,然后可以将另外的细分碳素元素[Ea]插入这些团块和钢体之间,以防止熔融金属渗入 界面。 在开管中,可以在碳钢团块和钢体之间插入由氯化铵或尿素组成的附加元素[Eu]。 附加元件在低温下分解,从而将残留气体冲洗出界面。 这些元件可以直接放置在管中或者随后焊接到管的盒[20,30]中。