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
    • 8. 发明授权
    • Method for manufacturing seamless steel tube
    • 无缝钢管制造方法
    • US07201812B2
    • 2007-04-10
    • US10414034
    • 2003-04-16
    • Hidenori Ogawa
    • Hidenori Ogawa
    • C21D8/10
    • B21B21/00B21B3/02B21B45/004B21B2015/0028B21B2015/0078B21B2023/005B21B2045/0227B21C1/22B21C23/002B21C23/085B21C37/06B21C37/20C21D8/10C21D8/105
    • A method for manufacturing a seamless steel tube, wherein a tubing material for the seamless steel tube is produced by a hot working process from a material having less workability, such as a high Cr—high Ni—high C alloy steel including Cr at a content not less than 15 weight % and Ni at a content not less than 20 weight % or a ferritic stainless steel including Cr at a content not less than 16 weight %, and then cold drawn at a reduction rate of not less than 15% and further cold rolled after applying an appropriate heat treatment, so that a round or an inner grooved steel tube is obtained. It is preferable that the hot extrusion process is employed for the hot working process and a cold Pilger mill is employed for the cold rolling process. In the cold rolling process, the crackings or damage resulting from the reduced toughness of the tubing material as well as the breakage of a mandrel in producing the round or the inner grooved tube can be suppressed.
    • 一种无缝钢管的制造方法,其中,通过热加工工序,由具有较低加工性的材料制成无缝钢管的管材,例如Cr含量高的Cr-高Ni-C合金钢,其含量 不小于15重量%的Ni,含量不小于20重量%的Ni或包含不低于16重量%的Cr的铁素体不锈钢,然后以15%以上的还原率进行冷拉伸 在进行适当的热处理后进行冷轧,得到圆形或内槽钢管。 优选在热加工过程中采用热挤压方法,并且使用冷的Pilger轧机进行冷轧工艺。 在冷轧过程中,可以抑制由于管材料的韧性降低而产生的裂纹或损坏以及在生产圆形或内槽管时心轴的断裂。