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    • 82. 发明申请
    • PREPARATION METHOD OF TUNGSTEN CARBIDE SINTERED BODY FOR FRICTION STIR WELDING TOOL
    • 用于摩擦焊接工具的碳化钨烧结体的制备方法
    • US20140191443A1
    • 2014-07-10
    • US14233424
    • 2011-12-09
    • Hyun Kuk ParkIk Hyun OhHee Jun YoonHyeon Taek SonKwang Jin LeeHee Seon BangHan Sur Bang
    • Hyun Kuk ParkIk Hyun OhHee Jun YoonHyeon Taek SonKwang Jin LeeHee Seon BangHan Sur Bang
    • C04B35/64C04B35/56B23K20/12
    • C04B35/64B22F3/105B23K20/1245C04B35/5626C04B35/645C04B2235/6562C04B2235/6581C04B2235/666C04B2235/77C04B2235/96C22C29/08
    • The present invention relates to a preparation method of a tungsten carbide sintered body for a friction stir welding tool used in a friction stir welding tool of a high melting point material such as steel, titanium and the like or a dissimilar material such as aluminum, magnesium-steel, titanium and the like using pulsed current activation through a discharge plasma sintering apparatus. The preparation method comprises the following steps: filling a tungsten carbide (WC) powder in a mold made of a graphite material; mounting the mold filled with tungsten carbide powder in a chamber of a discharge plasma sintering apparatus; making a vacuum inside of the chamber; molding the tungsten carbide powder while maintaining a constant pressure inside the mold and increasing the temperature according to a set heat increase pattern until the temperature reaches a final target temperature; and cooling the inside of the chamber while maintaining the pressure pressurized in the mold after the molding step. According to the preparation method of a tungsten carbide sintered body for a friction stir welding tool, it is possible to obtain a high relative density of 99.5% or higher, and to prepare a uniform sintered body having a homogeneous tissue with little particle growth, high toughness, high abrasion resistance and high strength within a short time by a single process when preparing a tungsten carbide sintered body appropriate for a friction stir welding tool by using pulsed current activation through a discharge plasma sintering apparatus. In addition, since a sintered body is prepared with only a tungsten carbide single material, excluding a sintering additive such as cobalt, a preparation method is simplified, preparation costs are reduced, and toughness, abrasion resistance and strength are superior compared with a sintered body containing cobalt, a sintering additive.
    • 本发明涉及一种用于摩擦搅拌焊接工具的碳化钨烧结体的制备方法,该工具用于诸如钢,钛等的高熔点材料的摩擦搅拌焊接工具或诸如铝,镁之类的异种材料 钢,钛等,通过放电等离子体烧结装置进行脉冲电流激活。 该制备方法包括以下步骤:在由石墨材料制成的模具中填充碳化钨(WC)粉末; 将填充有碳化钨粉末的模具安装在放电等离子体烧结装置的腔室中; 在室内进行真空; 在模具内保持恒定压力的同时成型碳化钨粉末,并根据设定的热量增加模式增加温度,直到温度达到最终目标温度; 并且在模制步骤之后保持在模具中加压的压力同时冷却腔室的内部。 根据用于摩擦搅拌焊接工具的碳化钨烧结体的制备方法,可以获得99.5%以上的高相对密度,并且制备均匀的具有少量颗粒生长的均匀组织的烧结体,高 当通过使用脉冲电流激活通过放电等离子体烧结装置制备适用于摩擦搅拌焊接工具的碳化钨烧结体时,通过单一工艺在短时间内具有韧性,高耐磨性和高强度。 此外,由于仅使用碳化钨单一材料制成烧结体,不包括钴等烧结添加剂,因此制备方法简单,制备成本降低,韧性,耐磨耗性和强度高于烧结体 含钴,烧结添加剂。
    • 83. 发明授权
    • Process for producing conductor built-in ceramic
    • 制造导体内置陶瓷的工艺
    • US08591801B2
    • 2013-11-26
    • US12740332
    • 2008-10-28
    • Yoshiya Tsutsui
    • Yoshiya Tsutsui
    • B28B1/24
    • C04B35/584B28B1/002B28B1/008B28B1/24B28B23/0056C04B35/5626C04B35/632C04B35/63408C04B35/63424C04B35/63432C04B41/009C04B41/5066C04B41/87C04B2111/94C04B2235/6022C04B41/4539
    • [Problems] To provide a process for producing a conductor built-in ceramic which can eliminate the need to conduct metallic lead wire processing, can suppress the entry of a foreign matter, dust and the like from gaps between bases formed in dewaxing and firing and can reduce a dielectric breakdown failure, and a conductor built-in ceramic produced by the production process.[Means for Solving Problems] A process for producing a conductor built-in ceramic, comprising the step of producing a molded product (11) for an energization part using a conduction mixture, containing an electroconductive ceramic powder and a binder, the step of holding the molded product (11) for an energization part within a mold (13) and filling a mixture (15), for a base, containing an insulating ceramic powder and a binder into the mold (13) to produce an element compact (17) comprising a molded product (11), for an energization part, covered with the mixture (15) for a base, and the step of firing the element compact (17). According to the production process, the formation of gaps between the energization part and the base can be suppressed, and external inclusion of a foreign material, dust and the like in the element compact (17) in dewaxing or firing can also be suppressed.
    • 本发明提供一种能够消除对金属引线加工的需要的内置陶瓷导体的制造方法,能够抑制异物,灰尘等从脱蜡,烧成后形成的基板间的间隙的进入, 可以减少绝缘击穿故障,以及通过生产工艺生产的导体内置陶瓷。 解决问题的手段本发明的导体内置陶瓷的制造方法,其特征在于,包括以下步骤:使用含有导电性陶瓷粉末和粘合剂的导电性混合物来制造用于通电部的通电部件的成型体(11),保持 用于在模具(13)内的通电部分的模制产品(11),并将含有绝缘陶瓷粉末和粘合剂的基底的混合物(15)填充到模具(13)中以产生元件紧凑件(17) 包括用于用于基座的混合物(15)的通电部分的模制产品(11)和烧结元件压块(17)的步骤。 根据制造方法,能够抑制通电部和基部之间的间隙的形成,并且还可以抑制脱蜡或烧制中的元件致密体(17)中的异物,灰尘等的外部包含。