JPS5550426A - Steel pipe inside treating method to provide oxidation resistance - Google Patents

Steel pipe inside treating method to provide oxidation resistance

Info

Publication number
JPS5550426A
JPS5550426A JP12530578A JP12530578A JPS5550426A JP S5550426 A JPS5550426 A JP S5550426A JP 12530578 A JP12530578 A JP 12530578A JP 12530578 A JP12530578 A JP 12530578A JP S5550426 A JPS5550426 A JP S5550426A
Authority
JP
Japan
Prior art keywords
steel pipe
ring
rings
oxidation resistance
pipe
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
Application number
JP12530578A
Other languages
Japanese (ja)
Inventor
Hideo Deguchi
Yoshinori Yano
Yozo Hayase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP12530578A priority Critical patent/JPS5550426A/en
Publication of JPS5550426A publication Critical patent/JPS5550426A/en
Pending legal-status Critical Current

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
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)

Abstract

PURPOSE:To enhance the oxidation resistance of the inside of a steel pipe by putting a working tool provided with hard rings into the pipe and by rotating the tool to hit the rings against the pipe inside by means of centrifugal force and to form a hammered layer. CONSTITUTION:Working tool 4 is connected to a shaft, put into a Cr-contg. steel pipe, and moved in the axial direction at an appropriate speed while being rotated at a high speed. When holder 41 rotates, since rings 43 are loosely fixed to pins 42, each ring 43 is moved in the outer circumferential direction by means of centrifugal force and takes a planetary motion. The outside of each ring 43 is uneven, so the protrusions hit against the inside of the steel pipe in succession with rotation and revolution of ring 43, forming a uniformly hammered inner layer. By this method the hammering depth is regulated arbitrarily, and a grain rcovering unit required for shot blasting is made unnecessary.
JP12530578A 1978-10-11 1978-10-11 Steel pipe inside treating method to provide oxidation resistance Pending JPS5550426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12530578A JPS5550426A (en) 1978-10-11 1978-10-11 Steel pipe inside treating method to provide oxidation resistance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12530578A JPS5550426A (en) 1978-10-11 1978-10-11 Steel pipe inside treating method to provide oxidation resistance

Publications (1)

Publication Number Publication Date
JPS5550426A true JPS5550426A (en) 1980-04-12

Family

ID=14906793

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12530578A Pending JPS5550426A (en) 1978-10-11 1978-10-11 Steel pipe inside treating method to provide oxidation resistance

Country Status (1)

Country Link
JP (1) JPS5550426A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57162540A (en) * 1981-03-31 1982-10-06 Anritsu Corp Mobile radio communication system
JPS58205991A (en) * 1982-05-26 1983-12-01 Toshiba Corp Non-volatile semiconductor memory device
KR100665166B1 (en) 2004-09-15 2007-01-04 수미도모 메탈 인더스트리즈, 리미티드 Steel tube excellent in exfoliation resistance of scale on inner surface
JP2012117119A (en) * 2010-12-01 2012-06-21 Nippon Steel Corp Ultrasonic impact processing apparatus for coil spring and method of ultrasonic impact processing for coil spring

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57162540A (en) * 1981-03-31 1982-10-06 Anritsu Corp Mobile radio communication system
JPS58205991A (en) * 1982-05-26 1983-12-01 Toshiba Corp Non-volatile semiconductor memory device
KR100665166B1 (en) 2004-09-15 2007-01-04 수미도모 메탈 인더스트리즈, 리미티드 Steel tube excellent in exfoliation resistance of scale on inner surface
JP2012117119A (en) * 2010-12-01 2012-06-21 Nippon Steel Corp Ultrasonic impact processing apparatus for coil spring and method of ultrasonic impact processing for coil spring

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