Method for improving impact power of JK55 steel grade oil well pipe by treating alloy steel with micro titanium
A technology of oil well pipe and alloy steel, which is applied in the field of seamless steel pipe manufacturing, can solve the problems of increased manufacturing cost of seamless steel pipes, and achieve the effects of low production cost, fine and uniform crystal grains, and uniform distribution of precipitates
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[0030] Hot rolling and forming: the temperature control of the billet in the preheating section, heating section and soaking section of the ring furnace is shown in Table 1.
[0031] Table 1 The temperature of each section of the round billet heating in the ring furnace
[0032]
[0033] The steel billet is heated to 1240℃~1290℃ in the ring furnace, and 1150℃~1210℃ is pierced into a capillary tube by a two-roll cross-rolling piercing machine, and then rolled into a waste tube through a 5-stand continuous mandrel rolling mill with a continuous rolling temperature of 1050. ℃~1160℃, and then heat sizing with 14 frame sizing and reducing machine, the outlet temperature of sizing is 830℃~900℃, and air cooling, sawing, straightening and flaw detection are carried out on a large cooling bed.
[0034] Pipe processing: steel pipe slitting, pipe end thread processing, steel pipe hydrostatic test, coupling screw connection, diameter, length measurement and weighing, spray marking, painting, sto...
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