US3060016A - Hardened steel roll and composition therefor - Google Patents

Hardened steel roll and composition therefor Download PDF

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Publication number
US3060016A
US3060016A US83917A US8391761A US3060016A US 3060016 A US3060016 A US 3060016A US 83917 A US83917 A US 83917A US 8391761 A US8391761 A US 8391761A US 3060016 A US3060016 A US 3060016A
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US
United States
Prior art keywords
roll
steel
hardened steel
hardness
manganese
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.)
Expired - Lifetime
Application number
US83917A
Other languages
English (en)
Inventor
George F Melloy
Donald E Wise
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.)
Bethlehem Steel Corp
Original Assignee
Bethlehem Steel Corp
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 Bethlehem Steel Corp filed Critical Bethlehem Steel Corp
Priority to US83917A priority Critical patent/US3060016A/en
Priority to GB1667/62A priority patent/GB977138A/en
Priority to AT52962A priority patent/AT254240B/de
Priority to LU41140D priority patent/LU41140A1/xx
Application granted granted Critical
Publication of US3060016A publication Critical patent/US3060016A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten

Definitions

  • Hardened steel rolls of these compositions have a maximum residual stress lower than that of prior roll steels of equal hardness. Furthermore, the steels of the invention exhibit no zone of hardness resurgance and attain the desired surface hardness, while the depth of hardening is greater than that realized with the aforementioned typical roll steel. In addition, the steels of the invention show unusual freedom from segregation and material defects.
  • This practice comprised preheating the roll to 700 F. and equalizing, further preheating the roll to 1250 F. and equalizing, uniformly austenitizing the roll at 1550 E., and quenching in a submerged Water spray.
  • the roll was then tempered at 300 F. for 120 hours. Following the heat treatment, the roll was machined and ground to final dimensions.
  • the roll had a final surface hardness of 95/98 Shore
  • the lower limit of useful hardness in hardened steel rolls is generally believed to be about 80 Shore C.
  • the depth of useful hardness, on this basis, in this roll was 0.8", while the depth of useful hardness of the aforementioned typical roll steel, determined on the same basis, was slightly over 0.5".
  • the roll had a maximum residual stress about 28% lower than that of the typical roll steel.
  • Hardened steel rolls having compositions within the broad ranges of the invenion have better resistance to premature failure than the best steel rolls of the prior art, while rolls having the preferred composition have much better resistance to premature failure.
  • All steels of the invention i.e. those of both broad and preferred ranges, have no zone of hardness resurgance.
  • these steels can be hardened to the desired surface hardness, and the depth of hardening is improved.
  • the steels are unusually free from segreagtion and material defects and can be produced at less cost.
  • a forged and hardened steel roll said roll consisting essentially of .70 to .75 carbon, .15 to 25% manganese, .70 to .85 chromium, .60 to .70% molybdenum, and the balance being essentially iron.
  • a steel alloy consisting essentially of .65 to .80% carbon, .10 to 35% manganese, .60 to 1.10% chromium,
  • the balance being essentially iron.
  • a forged and hardened steel roll said roll consisting essentially of .65 to .80% carbon, .10 to 35% manganese, .60 to 1.10% chromium, .45 to .70% molybdenum, vanadium up to ,15%, and the balance being essentially iron.
  • a forged and hardened steel roll said roll consisting essentially of .70 to .75% carbon, .15 to .25 manganese, .70 to .85% chromium, .60 to .70% molybdenum, vanadium up to .15%, and the balance being essentially iron.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Heat Treatment Of Articles (AREA)
US83917A 1961-01-23 1961-01-23 Hardened steel roll and composition therefor Expired - Lifetime US3060016A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US83917A US3060016A (en) 1961-01-23 1961-01-23 Hardened steel roll and composition therefor
GB1667/62A GB977138A (en) 1961-01-23 1962-01-17 Steel alloy
AT52962A AT254240B (de) 1961-01-23 1962-01-23 Stahllegierung und daraus hergestellte, geschmiedete und gehärtete Walze
LU41140D LU41140A1 (de) 1961-01-23 1962-01-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83917A US3060016A (en) 1961-01-23 1961-01-23 Hardened steel roll and composition therefor

Publications (1)

Publication Number Publication Date
US3060016A true US3060016A (en) 1962-10-23

Family

ID=22181496

Family Applications (1)

Application Number Title Priority Date Filing Date
US83917A Expired - Lifetime US3060016A (en) 1961-01-23 1961-01-23 Hardened steel roll and composition therefor

Country Status (4)

Country Link
US (1) US3060016A (de)
AT (1) AT254240B (de)
GB (1) GB977138A (de)
LU (1) LU41140A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331682A (en) * 1965-01-14 1967-07-18 Hitachi Ltd Low alloyed heat resisting steel
CN103146895A (zh) * 2013-03-11 2013-06-12 首钢贵阳特殊钢有限责任公司 一种凿岩钎杆用8Cr钢整体正火工艺
US11078559B2 (en) 2012-09-26 2021-08-03 Aktiebolaget Skf Rolling element bearing having bainite microstructure
CN114833196A (zh) * 2022-05-23 2022-08-02 常熟科弘材料科技有限公司 一种用于家电冷硬基板的软点改善方法以及家电冷硬基板

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2225022B (en) * 1988-11-04 1993-04-14 Nippon Seiko Kk Rolling-part steel and rolling part employing same
JP2870831B2 (ja) * 1989-07-31 1999-03-17 日本精工株式会社 転がり軸受
GB2235698B (en) * 1989-08-24 1994-04-06 Nippon Seiko Kk Rolling contact parts steel and rolling bearing made thereof
SE501382C2 (sv) * 1992-05-27 1995-01-30 Skf Ab Stål för kul- och rullager

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB457872A (en) * 1934-03-14 1936-12-02 Child Harold Wills Improvements in or relating to molybdenum alloy steels

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB457872A (en) * 1934-03-14 1936-12-02 Child Harold Wills Improvements in or relating to molybdenum alloy steels

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3331682A (en) * 1965-01-14 1967-07-18 Hitachi Ltd Low alloyed heat resisting steel
US11078559B2 (en) 2012-09-26 2021-08-03 Aktiebolaget Skf Rolling element bearing having bainite microstructure
CN103146895A (zh) * 2013-03-11 2013-06-12 首钢贵阳特殊钢有限责任公司 一种凿岩钎杆用8Cr钢整体正火工艺
CN103146895B (zh) * 2013-03-11 2017-06-16 首钢贵阳特殊钢有限责任公司 一种凿岩钎杆用8Cr钢整体正火工艺
CN114833196A (zh) * 2022-05-23 2022-08-02 常熟科弘材料科技有限公司 一种用于家电冷硬基板的软点改善方法以及家电冷硬基板

Also Published As

Publication number Publication date
AT254240B (de) 1967-05-10
LU41140A1 (de) 1962-03-23
GB977138A (en) 1964-12-02

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