TW200506071A - Low-carbon free cutting steel - Google Patents

Low-carbon free cutting steel

Info

Publication number
TW200506071A
TW200506071A TW093119223A TW93119223A TW200506071A TW 200506071 A TW200506071 A TW 200506071A TW 093119223 A TW093119223 A TW 093119223A TW 93119223 A TW93119223 A TW 93119223A TW 200506071 A TW200506071 A TW 200506071A
Authority
TW
Taiwan
Prior art keywords
inclusions
free cutting
rolling
circle
smaller
Prior art date
Application number
TW093119223A
Other languages
Chinese (zh)
Other versions
TWI247815B (en
Inventor
Naoki Matsui
Takayuki Nishi
Toru Kato
Koji Watari
Tatsuya Hasegawa
Original Assignee
Sumitomo Metal Ind
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 Ind filed Critical Sumitomo Metal Ind
Publication of TW200506071A publication Critical patent/TW200506071A/en
Application granted granted Critical
Publication of TWI247815B publication Critical patent/TWI247815B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/001—Ferrous alloys, e.g. steel alloys containing N
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/008—Ferrous alloys, e.g. steel alloys containing tin
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur

Abstract

The invention provides a low-carbon free cutting steel containing no lead and is at least comparable in machinability to the conventional leaded free cutting steels and composite free cutting steels and furthermore has excellent finished surface characteristics. The steel is a low-carbon free cutting steel which comprises, on the percent by mass basis, C: 0.05 to under 0.20%, Mn: 0.4 - 2.0%, S: 0.21 - 1.0%, Ti: 0.002 - 0.10%, P: 0.001 - 0.30%, Al: not higher than 0.2%, O: 0.001 - 0.03% and N: 0.0005 - 0.02%, with the balance being Fe and impurities, and which satisfies the relations (a) and (b) given below concerning the inclusions contained in the steel: (A+B)/C ≥ 0.8 ...(a), NA ≥ 5 ... (b), wherein, A: the total area occupied by substantial MnS with Ti carbide and/or Ti carbonitride included therein among the inclusions not smaller than 1μm in circle-equivalent diameter per mm<SP>2</SP> of a cross section parallel to the direction of rolling; B: the total area occupied by substantial MnS with neither Ti carbide nor Ti carbonitride included therein among the inclusions not smaller than 1 μm in circle-equivalent diameter per mm<SP>2</SP> of a cross section parallel to the direction of rolling; C: the total area occupied by all the inclusions not smaller than 1 μm in circle-equivalent diameter per mm<SP>2</SP> of a cross section parallel to the direction of rolling; NA: the number of substantial MnS inclusions with Ti carbide and/or Ti carbonitride included therein among the inclusions not smaller than 1 μm in circle-equivalent diameter per mm<SP>2</SP> of a cross section parallel to the direction of rolling.
TW093119223A 2003-08-01 2004-06-29 Low-carbon free cutting steel TWI247815B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003285463A JP3918787B2 (en) 2003-08-01 2003-08-01 Low carbon free cutting steel

Publications (2)

Publication Number Publication Date
TW200506071A true TW200506071A (en) 2005-02-16
TWI247815B TWI247815B (en) 2006-01-21

Family

ID=33562752

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093119223A TWI247815B (en) 2003-08-01 2004-06-29 Low-carbon free cutting steel

Country Status (7)

Country Link
US (1) US20050025658A1 (en)
EP (1) EP1507016B1 (en)
JP (1) JP3918787B2 (en)
KR (1) KR100615465B1 (en)
CN (1) CN1306056C (en)
DE (1) DE602004007730T2 (en)
TW (1) TWI247815B (en)

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JP2007289979A (en) * 2006-04-23 2007-11-08 Sanyo Special Steel Co Ltd Method for producing cast slab or steel ingot made of titanium-added case hardening steel and the cast slab or steel ingot, and case hardening steel made of the cast slab or steel ingot
KR100979058B1 (en) * 2007-10-17 2010-08-30 주식회사 포스코 Eco-friendly pb-free free cutting steel with excellent machinability and hot workability
KR100825566B1 (en) * 2006-12-28 2008-04-25 주식회사 포스코 Eco-friendly pb-free free cutting steel with excellent machinability and hot workability
US20100092330A1 (en) * 2006-12-28 2010-04-15 Posco Eco-friendly pb-free free cutting steel with excellent machinability and hot workability
BRPI0804500B1 (en) * 2007-04-18 2018-09-18 Nippon Steel & Sumitomo Metal Corp hot work steel
KR101018091B1 (en) 2008-07-09 2011-02-25 주식회사 포스코 Lead-free free cutting steel with excellent surface roughness through low built-up edge and manufacturing method thereof
TWI391500B (en) * 2008-08-06 2013-04-01 Posco Eco-friendly pb-free free-cutting steel and manufacturing method thereof
KR101027246B1 (en) 2008-08-06 2011-04-06 주식회사 포스코 Free-Cutting Steel with Excellent Machinability and Manufacturing Method Thereof
KR101105084B1 (en) * 2008-11-04 2012-01-16 주식회사 포스코 Eco-friendly pb-free free-cutting steel with excellent machinability
JPWO2010134583A1 (en) * 2009-05-22 2012-11-12 新日本製鐵株式会社 Machine structural steel with excellent cutting tool life and cutting method thereof
KR101289103B1 (en) 2009-12-14 2013-07-23 주식회사 포스코 Pb-Free Free-Cutting Steel Wire Rod With Excellent Machinability And Hot Workability And Manufacturing Method The Same
PL2772559T3 (en) 2011-10-25 2017-05-31 Nippon Steel & Sumitomo Metal Corporation Steel sheet
JP6036997B2 (en) * 2013-04-23 2016-11-30 新日鐵住金株式会社 Spring steel with excellent fatigue resistance and method for producing the same
JP5920531B2 (en) * 2013-04-25 2016-05-18 新日鐵住金株式会社 steel sheet
EA025921B1 (en) * 2013-06-24 2017-02-28 Государственное Научное Учреждение "Объединенный Институт Машиностроения Национальной Академии Наук Беларуси" Low-alloyed, boron-containing steel for face-hardened parts
CN104911457A (en) * 2014-03-15 2015-09-16 紫旭盛业（昆山）金属科技有限公司 High temperature-resistance die steel
CN103911550A (en) * 2014-03-24 2014-07-09 北京科技大学 Environment-friendly low-carbon high-sulfur and bismuth free-cutting steel with excellent thermoplasticity
CN104696379B (en) * 2015-02-10 2017-12-19 山东金马工业集团股份有限公司 Section fork product and preparation method thereof
US10400320B2 (en) 2015-05-15 2019-09-03 Nucor Corporation Lead free steel and method of manufacturing
CN108291285B (en) 2015-11-27 2020-03-27 日本制铁株式会社 Steel, carburized steel part, and method for producing carburized steel part
KR102226488B1 (en) 2016-09-30 2021-03-11 닛폰세이테츠 가부시키가이샤 Cold forging steel and its manufacturing method
CN110129516A (en) * 2019-06-11 2019-08-16 南京钢铁股份有限公司 A kind of method of oxide morphology in control low carbon high sulfur free-cutting steel
CN110714161B (en) * 2019-10-17 2020-09-22 中天钢铁集团有限公司 High-sulfur free-cutting steel for automobile and production process thereof
CN110791709B (en) * 2019-11-11 2020-12-04 广东韶钢松山股份有限公司 Structural steel wire rod and method for improving cutting performance of structural steel wire rod
WO2021201178A1 (en) * 2020-03-31 2021-10-07 Ｊｆｅスチール株式会社 Free-cutting steel and method for manufacturing same
KR20220131326A (en) * 2020-03-31 2022-09-27 제이에프이 스틸 가부시키가이샤 Free-cutting steel and its manufacturing method
CN112095051B (en) * 2020-11-02 2021-02-02 北京科技大学 Magnesium-calcium-tellurium composite treated free-cutting steel and preparation method and application thereof

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Also Published As

Publication number Publication date
DE602004007730D1 (en) 2007-09-06
EP1507016A1 (en) 2005-02-16
DE602004007730T2 (en) 2008-04-30
JP3918787B2 (en) 2007-05-23
EP1507016B1 (en) 2007-07-25
US20050025658A1 (en) 2005-02-03
JP2005054227A (en) 2005-03-03
CN1580312A (en) 2005-02-16
TWI247815B (en) 2006-01-21
CN1306056C (en) 2007-03-21
KR20050016017A (en) 2005-02-21
KR100615465B1 (en) 2006-08-25

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