JPS55104456A - Machine structural boron steel - Google Patents

Machine structural boron steel

Info

Publication number
JPS55104456A
JPS55104456A JP1092379A JP1092379A JPS55104456A JP S55104456 A JPS55104456 A JP S55104456A JP 1092379 A JP1092379 A JP 1092379A JP 1092379 A JP1092379 A JP 1092379A JP S55104456 A JPS55104456 A JP S55104456A
Authority
JP
Japan
Prior art keywords
machine structural
steel
boron steel
forgeability
machinability
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
JP1092379A
Other languages
Japanese (ja)
Inventor
Masashi Takahashi
Fukukazu Nakazato
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 JP1092379A priority Critical patent/JPS55104456A/en
Publication of JPS55104456A publication Critical patent/JPS55104456A/en
Pending legal-status Critical Current

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  • Heat Treatment Of Steel (AREA)

Abstract

PURPOSE: To provide a machine structural boron steel with superior forgeability, machinability, notch toughness and fatigue properties by adding C, Si, Mn, B and sol. Al and esp. restricting the contents of Ti and N out of impurities.
CONSTITUTION: This machine structural boron steel has a compsn. prepared by restricting N to a predetermined amt. or less to ensure the hardenability effect of B without adding Ti to prevent deteriorations in forgeability, machinability, etc. due to conventional Ti addn. The compsn. consists of C 0.25W0.50%, Si ≤0.50%, Mn 0.30W2.00%, B 0.0003W0.0050%, sol. Al 0.020W0.060%, and the balance Fe and inevitable impurities. This steel has superior mechanical properties such as forgeability, hardenability, machinability, toughness and fatigue properties for end products, and further it is excellent in characteristics which are required in a process for working the steel into machine parts.
COPYRIGHT: (C)1980,JPO&Japio
JP1092379A 1979-02-01 1979-02-01 Machine structural boron steel Pending JPS55104456A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1092379A JPS55104456A (en) 1979-02-01 1979-02-01 Machine structural boron steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1092379A JPS55104456A (en) 1979-02-01 1979-02-01 Machine structural boron steel

Publications (1)

Publication Number Publication Date
JPS55104456A true JPS55104456A (en) 1980-08-09

Family

ID=11763752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1092379A Pending JPS55104456A (en) 1979-02-01 1979-02-01 Machine structural boron steel

Country Status (1)

Country Link
JP (1) JPS55104456A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5794516A (en) * 1980-12-05 1982-06-12 Toyota Motor Corp Method for heat treatment on low-carbon boron steel
JPS59215461A (en) * 1983-05-20 1984-12-05 Daido Steel Co Ltd Steel for machine structural purpose
JPS63303033A (en) * 1987-04-16 1988-12-09 ケンナメタル　インコーポレイテツド Mining/building bit having bit main body formed of mn-b steel alloy
JPH01176056A (en) * 1987-12-29 1989-07-12 Aichi Steel Works Ltd High strength steel having excellent fatigue strength
JPH02111842A (en) * 1988-06-30 1990-04-24 Kawasaki Steel Corp Hot rolling steel stock excellent in machinability and hardenability

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS522825A (en) * 1975-06-24 1977-01-10 Nippon Steel Corp Method of manufacturing high tensile seam welded steel tube
JPS53125216A (en) * 1977-04-08 1978-11-01 Nippon Steel Corp Low alloy steel of excellent cold forgeability for high strength bolt

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS522825A (en) * 1975-06-24 1977-01-10 Nippon Steel Corp Method of manufacturing high tensile seam welded steel tube
JPS53125216A (en) * 1977-04-08 1978-11-01 Nippon Steel Corp Low alloy steel of excellent cold forgeability for high strength bolt

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5794516A (en) * 1980-12-05 1982-06-12 Toyota Motor Corp Method for heat treatment on low-carbon boron steel
JPS5933190B2 (en) * 1980-12-05 1984-08-14 トヨタ自動車株式会社 Heat treatment method for low carbon boron steel
JPS59215461A (en) * 1983-05-20 1984-12-05 Daido Steel Co Ltd Steel for machine structural purpose
JPH0512421B2 (en) * 1983-05-20 1993-02-18 Daido Steel Co Ltd
JPS63303033A (en) * 1987-04-16 1988-12-09 ケンナメタル　インコーポレイテツド Mining/building bit having bit main body formed of mn-b steel alloy
JPH01176056A (en) * 1987-12-29 1989-07-12 Aichi Steel Works Ltd High strength steel having excellent fatigue strength
JPH02111842A (en) * 1988-06-30 1990-04-24 Kawasaki Steel Corp Hot rolling steel stock excellent in machinability and hardenability

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