SKEW ROLLING METHOD OF SEAMLESS TUBE

Title:

SKEW ROLLING METHOD OF SEAMLESS TUBE

Document Type and Number:

Japanese Patent JPH091210

Kind Code:

A

Abstract:

PURPOSE: To easily prolong the life of a tool for hot working such as a plug for rolling a seamless steel tube which is used under severe conditions such as rolling of high alloy steel.

CONSTITUTION: In a skew rolling method of the seamless steel tube using a skew rolling mill, after a water-glass base lubricant is applied on the plug 1, on the surface of which oxided scale is preliminarily produced by heat treatment, the temp. of the plug is raised till the weight percentage of silicon oxide in the lubricant becomes ≥80% and the plug is used for rolling.

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Inventors:

YORIFUJI AKIRA
KANAYAMA TARO

Application Number:

JP17566295A

Publication Date:

January 07, 1997

Filing Date:

June 20, 1995

Export Citation:

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Assignee:

KAWASAKI STEEL CO

International Classes:

B21B19/04; B21B25/00; (IPC1-7): B21B25/00; B21B19/04

Attorney, Agent or Firm:

Shuji Shiokawa

Next Patent: BUILT-UP ROLLING ROLL FOR SHAPE AND MANUFACTURE THEREOF