JPS52131909A - Production of spital steel tube - Google Patents
Production of spital steel tubeInfo
- Publication number
- JPS52131909A JPS52131909A JP4787676A JP4787676A JPS52131909A JP S52131909 A JPS52131909 A JP S52131909A JP 4787676 A JP4787676 A JP 4787676A JP 4787676 A JP4787676 A JP 4787676A JP S52131909 A JPS52131909 A JP S52131909A
- Authority
- JP
- Japan
- Prior art keywords
- spital
- production
- steel tube
- tube
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
- C21D1/30—Stress-relieving
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Child & Adolescent Psychology (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pressure Vessels And Lids Thereof (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To eliminate internal stress and Bauschinger effect of a spiral tube by heating the inner surface of the tube so as to prevent degradation of dimensional accuracy of the tube due to an increase in diameter at hydraulic tests.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4787676A JPS52131909A (en) | 1976-04-28 | 1976-04-28 | Production of spital steel tube |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4787676A JPS52131909A (en) | 1976-04-28 | 1976-04-28 | Production of spital steel tube |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS52131909A true JPS52131909A (en) | 1977-11-05 |
Family
ID=12787573
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4787676A Pending JPS52131909A (en) | 1976-04-28 | 1976-04-28 | Production of spital steel tube |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS52131909A (en) |
-
1976
- 1976-04-28 JP JP4787676A patent/JPS52131909A/en active Pending
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