LUBRICANT FOR PIERCING ROLLING PLUG AND METHOD FOR PIERCING ROLLING SEAMLESS STEEL PIPE
Document Type and Number:
Japanese Patent JP2001234189
To obtain a lubricant capable of prolonging the life of a plug for piercing rolling a seamless steel pipe and to provide a method for piercing rolling a seamless steel pipe using this lubricant.
The lubricant is composed of 1-10% of a granular layered substance, 1-10% of a water-dispersible or water-soluble polymer, 0-15% of an inorganic binder and the rest of water. In the rolling method, employed is a plug having a scale thickness H of at least the tip portion thereof of at least 1 μm and having formed on the surface thereof a dried and hardened coated film of the lubricant having a thickness V satisfying the equation: V≥50/H.
August 28, 2001
February 21, 2000
SUMITOMO METAL IND LTD
B21B19/04; B21B25/00; B21B25/04; C10M103/00; C10M103/02; C10M103/06; C10M125/10; C10M125/14; C10M125/26; C10M143/00; C10M145/06; C10M145/14; C10M145/40; C10M173/02; C10N10/02; C10N10/12; C10N20/06; C10N40/24; B21B19/00; B21B25/00; C10M103/00; C10M125/00; C10M143/00; C10M145/00; C10M173/02; (IPC1-7): C10M173/02; B21B19/04; B21B25/00; B21B25/04; C10M103/00; C10M103/02; C10M103/06; C10M125/10; C10M125/14; C10M125/26; C10M143/00; C10M145/06; C10M145/14; C10M145/40