公开(公告)号：US08464568B2

公开(公告)日：2013-06-18

申请号：US12225726

申请日：2007-03-20

申请人： Kouji Nakaike ,  Yasuyoshi Hidaka ,  Hiroshi Nogami

发明人： Kouji Nakaike ,  Yasuyoshi Hidaka ,  Hiroshi Nogami

IPC分类号： B21B19/04 ,  B21B17/10

CPC分类号： B21B23/00 ,  B21B17/02 ,  B21B17/04 ,  B21B19/04 ,  B21B25/04 ,  B21B45/004 ,  C21D1/70 ,  C21D1/74 ,  C21D3/00 ,  C21D8/10 ,  C21D9/08

摘要： A production method of a seamless pipe or tube according to the present invention comprises the steps of applying a lubricant containing carbon to a mandrel bar, producing a material pipe or tube with a mandrel mill using the mandrel bar to which the lubricant is applied, and reheating the material pipe or tube in a reheating furnace, wherein when a temperature of the material pipe or tube is 550° C. or higher and 1000° C. or lower in the reheating step, an oxidizing gas is fed into the material pipe or tube.

摘要翻译： 根据本发明的无缝管或管的制造方法包括以下步骤：向芯棒施加含碳润滑剂，使用使用润滑剂的芯棒，用芯棒式无缝管轧机生产材料管或管;以及 在再加热炉中重新加热材料管或管，其中当再加热步骤中材料管或管的温度为550℃以上且1000℃以下时，将氧化气体供给至原料管或 管。

公开(公告)号：US07325429B2

公开(公告)日：2008-02-05

申请号：US11603205

申请日：2006-11-22

申请人： Kouji Nakaike ,  Tetsuya Nakanishi ,  Junji Nakata

发明人： Kouji Nakaike ,  Tetsuya Nakanishi ,  Junji Nakata

IPC分类号： B21B19/04

CPC分类号： B21B19/04 ,  B21B3/02 ,  B21B17/14 ,  B21B19/06 ,  B21B23/00 ,  C21D8/105 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/50 ,  Y10S72/70

摘要： A round billet containing, by mass %, 10.50 to 14.00% of Cr with a value represented by the equation of “Cr+4Si−(22C+0.5Mn+1.5Ni+30N)” of not more than 9.0%, wherein the symbols of the elements represent the contents, by mass %, of the elements in the steel, is heated at a soaking temperature of 1100 to 1250 ° C. so that an in-furnace time (min) is not less than “0.5×Diameter of the round billet (mm)”, and then pierced and rolled with a piercing efficiency by a piercing mill of not less than 50%, a value regulated by the equation: “{(Diameter of the round billet−Roll gap at the foremost end of the plug)/Diameter of the round billet}×100” of not more than 8.0, and a plug shape represented by the equation: “Radius of foremost end of the plug (mm)/Diameter of the round billet (mm)” of 0.06 to 0.17. The thus-manufactured high-Cr seamless steel pipe or tube has excellent internal surface properties with minimized internal surface defects.

摘要翻译： 一种圆形坯料，其以质量％计含有由“Cr + 4Si-（22C + 0.5Mn + 1.5Ni + 30N）”表示的值为10.00％以下的值为10.50〜14.00％的Cr，其中符号 的元素表示钢中的元素的质量％，在1100〜1250℃的均热温度下加热，炉内时间（min）不小于 圆形坯料（mm）“，然后通过穿孔磨机刺穿而不破坏50％的穿孔轧制，由以下等式调节的值：”{（（最前端的圆坯 - 辊间隙的直径） 插头）/圆形坯料的直径××××××××××××××××××，以及由下式所示的插头形状：“插头前端半径（mm）/圆钢坯直径（mm）”为0.06 至0.17。 如此制造的高Cr无缝钢管或管具有优异的内表面性能，内表面缺陷最小。

公开(公告)号：US20070062238A1

公开(公告)日：2007-03-22

申请号：US11603205

申请日：2006-11-22

申请人： Kouji Nakaike ,  Tetsuya Nakanishi ,  Junji Nakata

发明人： Kouji Nakaike ,  Tetsuya Nakanishi ,  Junji Nakata

IPC分类号： B21B19/04

CPC分类号： B21B19/04 ,  B21B3/02 ,  B21B17/14 ,  B21B19/06 ,  B21B23/00 ,  C21D8/105 ,  C22C38/004 ,  C22C38/02 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/50 ,  Y10S72/70

摘要： A round billet containing, by mass %, 10.50 to 14.00% of Cr with a value represented by the equation of “Cr+4Si−(22C+0.5Mn+1.5Ni+30N)” of not more than 9.0%, wherein the symbols of the elements represent the contents, by mass %, of the elements in the steel, is heated at a soaking temperature of 1100 to 1250 ° C. so that an in-furnace time (min) is not less than “0.5×Diameter of the round billet (mm)”, and then pierced and rolled with a piercing efficiency by a piercing mill of not less than 50%, a value regulated by the equation: “{(Diameter of the round billet−Roll gap at the foremost end of the plug)/Diameter of the round billet} ×100” of not more than 8.0, and a plug shape represented by the equation: “Radius of foremost end of the plug (mm)/Diameter of the round billet (mm)” of 0.06 to 0.17. The thus-manufactured high-Cr seamless steel pipe or tube has excellent internal surface properties with minimized internal surface defects.

摘要翻译： 一种圆形坯料，其以质量％计含有由“Cr + 4Si-（22C + 0.5Mn + 1.5Ni + 30N）”表示的值为10.00％以下的值为10.50〜14.00％的Cr，其中符号 的元素表示钢中的元素的质量％，在1100〜1250℃的均热温度下加热，炉内时间（min）不小于 圆形坯料（mm）“，然后通过穿孔磨机刺穿而不破坏50％的穿孔轧制，由以下等式调节的值：”{（（最前端的圆坯 - 辊间隙的直径） 插头）/圆形坯料的直径××××××××××××××××××，以及由下式所示的插头形状：“插头前端半径（mm）/圆钢坯直径（mm）”为0.06 至0.17。 如此制造的高Cr无缝钢管或管具有优异的内表面性能，内表面缺陷最小。