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Patent Searching and Data


Title:
MANUFACTURE OF COMBINED ALLOY CYLINDER
Document Type and Number:
Japanese Patent JPH02194107
Kind Code:
A
Abstract:

PURPOSE: To prevent damage of crack, etc., without adding the special complicate process by developing compressive residual stress so as to cancel tensile stress caused by inner pressure in a cylinder during using in corrosion resistant and wear resistant alloy layer on the inner face of the cylinder.

CONSTITUTION: Before inserting a steel-made core 2 into the cylinder base material 1, Ti or Ti alloy film layer having the suitable thickness is formed on the outer face of the core 2, or Ti or Ti alloy foil having the suitable thickness is wound and fixed on the outer face of the core 2. Successively, brittle layer 7 of Ti-Fe intermetallic compound, formed by reacting Fe and Ti in the core 2 with HIP treatment, is formed at between the outer face of the core and the lining alloy layer 8. After completing the HIP treatment, at the time of removing the core 2 by cutting both ends of the cylinder base material 1 with machining work, the detachment between the lining alloy layer and the core 2 is made to good with the brittle layer 7, and the lining alloy layer 8 is made to the remaining condition of the compressed residual stress to circular direction without developing any crack. The tensile stress loaded to the cylinder body at the time of operating at high temp. and high inner pressure is reduced with the compressive residual stress in the alloy layer 8.


Inventors:
KOMURO AKIMITSU
Application Number:
JP1259889A
Publication Date:
July 31, 1990
Filing Date:
January 21, 1989
Export Citation:
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Assignee:
SUMITOMO HEAVY INDUSTRIES
International Classes:
B22F7/04; B22F5/12; (IPC1-7): B22F7/04
Attorney, Agent or Firm:
Rikichi Somekawa (2 outside)