会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明公开
    • HEAT TRANSFER TUBE FOR STEAM GENERATOR AND METHOD FOR PRODUCING SAME
    • WÄRMEÜBERTRAGUNGSROHRFÜRDAMPFERZEUGER
    • EP2587206A1
    • 2013-05-01
    • EP11800358.1
    • 2011-06-07
    • Nippon Steel & Sumitomo Metal Corporation
    • TOYODA, MasatoshiKURODA, Kouichi
    • F28F1/00B21C3/10B21C9/00B21D3/02C22C19/05C22C38/00C22C38/58C22F1/10F28F1/40F28F21/08C22F1/00
    • F22B37/12B21C9/00B21C19/00B21D3/02B21D3/04B21D22/201B21D51/24C21D6/004C22C19/05C22C38/40C22F1/10F28D2021/0064F28F1/40
    • In a heat transfer tube for a steam generator, a surface roughness of an inner surface of the tube is measured along a longitudinal direction and an amount of dimensional variation in a length of 50 mm taken from a measured roughness chart is 4 µm or less and an amount of bend crookedness in a portion of a length of 1000 mm from a tube end is 1 mm or less. Hence, when the tube is produced, an inspection of the tube by an eddy current flaw detection can be conducted at a high S/N ratio and hence an inspection efficiency can be improved, and when the tube is assembled into a heat exchanger, the assembling operation can be easily performed. It is preferable that the heat transfer tube for a steam generator according to the present invention is produced by the steps of cold drawing by use of a high-pressure lubricating oil of 40 MPa or more in pressure; solid solution heat treatment; and straightening by a roll straightening machine. Further, it is preferable that the roll straightening machine is a roll straightening machine using at least five pairs of concave globoidal drum type straightening rolls, each pair of rolls being arranged opposite to each other in a vertical direction and in a crossing manner where directions of rotating shafts cross each other.
    • 在用于蒸汽发生器的传热管中,沿着纵向方向测量管的内表面的表面粗糙度,并且从测量的粗糙度图取得的长度为50mm的尺寸变化量为4μm以下, 从管端的长度为1000mm的部分的弯曲弯曲量为1mm以下。 因此,当制造管时,可以以高S / N比进行涡流探伤的管的检查,从而可以提高检查效率,并且当将管组装到热交换器中时, 可以容易地进行组装操作。 本发明的蒸汽发生器用传热管优选通过使用压力为40MPa以上的高压润滑油进行冷拉拔的工序来制造。 固溶热处理; 并通过辊矫直机矫直。 此外,优选的是,辊矫直机是使用至少五对凹球形滚筒式矫直辊的辊矫直机,每对辊沿垂直方向和横向方向彼此相对地布置, 旋转轴彼此交叉。