WO2014101772A1 - Cobalt-chromium-molybdenum alloy with high wear resistance - Google Patents

Cobalt-chromium-molybdenum alloy with high wear resistance Download PDF

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Publication number
WO2014101772A1
WO2014101772A1 PCT/CN2013/090440 CN2013090440W WO2014101772A1 WO 2014101772 A1 WO2014101772 A1 WO 2014101772A1 CN 2013090440 W CN2013090440 W CN 2013090440W WO 2014101772 A1 WO2014101772 A1 WO 2014101772A1
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Prior art keywords
wear resistance
cobalt
chromium
high wear
elements
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PCT/CN2013/090440
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French (fr)
Inventor
Yansheng ZHOU
Jianjun Liu
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Matrix Metals Llc
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Publication of WO2014101772A1 publication Critical patent/WO2014101772A1/en

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C19/00—Alloys based on nickel or cobalt
    • C22C19/07—Alloys based on nickel or cobalt based on cobalt
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent

Definitions

  • the present invention belongs to the technical field of high-temperature alloys, and in particular provides a cobalt-chromium-molybdenum alloy with high wear resistance.
  • cobalt-based alloys There are two main sets of cobalt-based alloys: cobalt-chromium-tungsten (CoCrW) and cobalt-chromium-molybdenum (CoCrMo).
  • CoCrW cobalt-chromium-tungsten
  • CoCrMo cobalt-chromium-molybdenum
  • the object of the present invention is to provide a CoCrMo alloy with high wear resistance, which solves the problem of inadequate wear resistance in existing CoCrMo alloys well.
  • the product can be manufactured by casting, forging or powder metallurgy, etc. It can meet the requirements of the zinc industry, etc., or of demanding industrial environments where resistance to high temperatures, corrosion and wear are all required. It can satisfy the requirements of the jewellery industry for products such as rings, bracelets and watch cases to be scratch-resistant and shinier, and can be used to manufacture sputtering targets for electroplating, wherein a compact and shiny surface layer with high wear resistance is formed by physical vapour deposition, satisfying the higher demands people place on the appearance, colour, lustre and impression of jewellery.
  • the present invention is an alloy material in which cobalt is the matrix, with the weight percentages of the component elements thereof being as follows: chromium Cr: 24 - 35%; molybdenum Mo: 5 - 20%; carbon C: 0.35 - 2.5%; nickel Ni: 0 - 4%; iron Fe: 0 - 4%; silicon Si: 0 - 2%; manganese Mn: 0 - 2%; with the remainder being cobalt Co and other unavoidable impurity elements and process elements.
  • Solid solution strengthening is the main method used to strengthen common cobalt-chromium-molybdenum (CoCrMo) series alloys in China and abroad, with materials formed by this strengthening method having a maximum hardness of about HRC35.
  • CoCrMo alloy with high wear resistance to which the present invention relates two improvements are made which build upon solid solution strengthening. The first is increased weighting in the solid-solution-strengthened alloy, such as a significantly increased Mo content in the solid-solution-strengthened alloy. The second is a significantly increased content of C amongst the components, leading to the formation of a large amount of carbides in the material.
  • the various carbides have a far higher microhardness than the solid solution, so a significant increase in the hardness of the material is achieved, solving the problems of existing CoCrMo alloy products in having insufficient hardness and inadequate wear resistance despite resistance to oxidation and corrosion.
  • the CoCrMo alloy with high wear resistance to which the present invention relates has a hardness range of 36 - 65 HRC.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Physical Vapour Deposition (AREA)
  • Powder Metallurgy (AREA)
  • Adornments (AREA)

Abstract

Disclosed is a cobalt-chromium-molybdenum alloy with high wear resistance, belonging to the technical field of high-temperature alloys. The weight percentages of the component elements thereof are as follows: Cr: 24-35%; Mo: 5-20%; C: 0.35-2.5%; Ni: 0-4%; Fe: 0-4%; Si: 0-2%; Mn: 0-2%; the remainder being Co and other unavoidable impurity elements and process elements. The advantages thereof are: it solves the problem of inadequate wear resistance in existing CoCrMo alloys well; the product can be manufactured by casting, forging or powder metallurgy, etc.; it can meet the requirements of the zinc industry, etc., or of demanding industrial environments where resistance to high temperatures, corrosion and wear are all required; it can satisfy the requirements of the jewellery industry for products such as rings, bracelets and watch cases to be scratch-resistant and shinier, and can be used to manufacture sputtering targets for electroplating, wherein a compact and shiny surface layer with high wear resistance is formed by physical vapour deposition, satisfying the higher demands people place on the appearance, colour, lustre and impression of jewellery.

Description

Cobalt-chromium-molybdenum alloy with high wear resistance
FIELD OF THE INVENTION
The present invention belongs to the technical field of high-temperature alloys, and in particular provides a cobalt-chromium-molybdenum alloy with high wear resistance.
BACKGROUND OF THE INVENTION
There are two main sets of cobalt-based alloys: cobalt-chromium-tungsten (CoCrW) and cobalt-chromium-molybdenum (CoCrMo). The cobalt-chromium- tungsten (CoCrW) series of alloys are resistant to high temperatures and have excellent wear resistance, but inadequate corrosion resistance, whereas the cobalt-chromium-molybdenum (CoCrMo) series of alloys are resistant to high temperatures and have excellent corrosion resistance, but inadequate wear resistance.
The following table shows standard component ranges and hardness indices for common cobalt-chromium-molybdenum (CoCrMo) series alloys in China and abroad:
1 YY0605. 12-2007/ISO5832-12:1996
Table 1 Unit: Wt%
Figure imgf000002_0001
2 ASTM F75-07 and ASTM1537-08
Table 2 Unit: Wt%
Figure imgf000003_0001
SUMMARY OF THE INVENTION
The object of the present invention is to provide a CoCrMo alloy with high wear resistance, which solves the problem of inadequate wear resistance in existing CoCrMo alloys well. The product can be manufactured by casting, forging or powder metallurgy, etc. It can meet the requirements of the zinc industry, etc., or of demanding industrial environments where resistance to high temperatures, corrosion and wear are all required. It can satisfy the requirements of the jewellery industry for products such as rings, bracelets and watch cases to be scratch-resistant and shinier, and can be used to manufacture sputtering targets for electroplating, wherein a compact and shiny surface layer with high wear resistance is formed by physical vapour deposition, satisfying the higher demands people place on the appearance, colour, lustre and impression of jewellery.
The present invention is an alloy material in which cobalt is the matrix, with the weight percentages of the component elements thereof being as follows: chromium Cr: 24 - 35%; molybdenum Mo: 5 - 20%; carbon C: 0.35 - 2.5%; nickel Ni: 0 - 4%; iron Fe: 0 - 4%; silicon Si: 0 - 2%; manganese Mn: 0 - 2%; with the remainder being cobalt Co and other unavoidable impurity elements and process elements.
Solid solution strengthening is the main method used to strengthen common cobalt-chromium-molybdenum (CoCrMo) series alloys in China and abroad, with materials formed by this strengthening method having a maximum hardness of about HRC35. In the CoCrMo alloy with high wear resistance to which the present invention relates, two improvements are made which build upon solid solution strengthening. The first is increased weighting in the solid-solution-strengthened alloy, such as a significantly increased Mo content in the solid-solution-strengthened alloy. The second is a significantly increased content of C amongst the components, leading to the formation of a large amount of carbides in the material. The various carbides have a far higher microhardness than the solid solution, so a significant increase in the hardness of the material is achieved, solving the problems of existing CoCrMo alloy products in having insufficient hardness and inadequate wear resistance despite resistance to oxidation and corrosion.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The above-mentioned domestic and foreign CoCrMo alloy materials have a hardness range of HRC 25 - 35, so the wear resistance thereof is clearly inadequate.
Materials were mixed in the component proportions given below, steel ingots were produced by vacuum casting, and the hardness of the alloys produced were tested. The results are shown in Table 3:
Table 3 Wt%
Figure imgf000005_0001
In summary, the CoCrMo alloy with high wear resistance to which the present invention relates has a hardness range of 36 - 65 HRC.

Claims

1. Cobalt-chromium- molybdenum alloy with high wear resistance, characterized in that the weight percentages of the component elements thereof are as follows: chromium Cr: 24 - 35%; molybdenum Mo: 5 - 20%; carbon C: 0.35 - 2.5%; nickel Ni: 0 - 4%; iron Fe: 0 - 4%; silicon Si: 0 - 2%; manganese Mn: 0 - 2%; with the remainder being cobalt Co and other unavoidable impurity elements and process elements.
PCT/CN2013/090440 2012-12-26 2013-12-25 Cobalt-chromium-molybdenum alloy with high wear resistance WO2014101772A1 (en)

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CN201210576100XA CN103060617A (en) 2012-12-26 2012-12-26 Co-Cr-Mo alloy with high wear resistance

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EP3000728A1 (en) * 2014-09-26 2016-03-30 Goodrich Corporation Landing gear components having improved joints
JP2018151299A (en) * 2017-03-14 2018-09-27 セイコーエプソン株式会社 Watch component and watch
JP2018151298A (en) * 2017-03-14 2018-09-27 セイコーエプソン株式会社 Watch component and watch
EP3382056A1 (en) * 2017-03-27 2018-10-03 Seiko Epson Corporation Timepiece part, and timepieces
EP3375903A3 (en) * 2017-03-14 2018-10-10 Seiko Epson Corporation Timepiece part, and timepiece
JP2018163085A (en) * 2017-03-27 2018-10-18 セイコーエプソン株式会社 Watch component and watch
JP2018163086A (en) * 2017-03-27 2018-10-18 セイコーエプソン株式会社 Watch component and watch
US11155904B2 (en) 2019-07-11 2021-10-26 L.E. Jones Company Cobalt-rich wear resistant alloy and method of making and use thereof
US11224915B2 (en) * 2017-06-05 2022-01-18 General Electric Company Method of repairing a component using an additive manufacture replacement coupon, and alloy for additive manufacturing
CN115698351A (en) * 2020-05-11 2023-02-03 海恩斯国际公司 Deformable chromium-containing cobalt-based alloys with improved resistance to galling and chloride-induced crevice attack

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US9289037B2 (en) 2011-10-20 2016-03-22 Mythrial Metals Llc Hardened cobalt based alloy jewelry and related methods
CN103060617A (en) * 2012-12-26 2013-04-24 北京融点金属有限公司 Co-Cr-Mo alloy with high wear resistance
CN103952596B (en) * 2014-05-12 2016-03-23 四川省有色冶金研究院有限公司 A kind of vitallium powder preparation method increasing material manufacture for metal
CN104028770B (en) * 2014-06-09 2017-03-08 宝鸡飞利有色金属材料有限公司 A kind of preparation method of medical vitallium spheroidal particle
CN105364074A (en) * 2014-08-15 2016-03-02 安泰科技股份有限公司 Preparation method for high-compactness chromium-tungsten alloy target material
CN105950942A (en) * 2016-05-18 2016-09-21 太仓市中厚机械有限公司 Main shaft of splitting machine
CN106674724A (en) * 2016-08-31 2017-05-17 苏州万隆汽车零部件股份有限公司 Preparation method of automobile front bumper material
CN108691003B (en) * 2018-06-12 2020-06-26 常州大学 Method for improving comprehensive performance of cobalt-based alloy surface
CN117385234A (en) * 2023-12-12 2024-01-12 成都先进金属材料产业技术研究院股份有限公司 Cobalt-base alloy for high-end decoration and preparation method thereof

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JPS62136544A (en) * 1985-12-06 1987-06-19 Kubota Ltd Alloy for electrically conductive roll for electroplating
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3000728A1 (en) * 2014-09-26 2016-03-30 Goodrich Corporation Landing gear components having improved joints
US9452827B2 (en) 2014-09-26 2016-09-27 Goodrich Corporation Landing gear components having improved joints
JP2018151299A (en) * 2017-03-14 2018-09-27 セイコーエプソン株式会社 Watch component and watch
JP2018151298A (en) * 2017-03-14 2018-09-27 セイコーエプソン株式会社 Watch component and watch
EP3375903A3 (en) * 2017-03-14 2018-10-10 Seiko Epson Corporation Timepiece part, and timepiece
EP3382056A1 (en) * 2017-03-27 2018-10-03 Seiko Epson Corporation Timepiece part, and timepieces
JP2018163085A (en) * 2017-03-27 2018-10-18 セイコーエプソン株式会社 Watch component and watch
JP2018163086A (en) * 2017-03-27 2018-10-18 セイコーエプソン株式会社 Watch component and watch
US11224915B2 (en) * 2017-06-05 2022-01-18 General Electric Company Method of repairing a component using an additive manufacture replacement coupon, and alloy for additive manufacturing
US11155904B2 (en) 2019-07-11 2021-10-26 L.E. Jones Company Cobalt-rich wear resistant alloy and method of making and use thereof
CN115698351A (en) * 2020-05-11 2023-02-03 海恩斯国际公司 Deformable chromium-containing cobalt-based alloys with improved resistance to galling and chloride-induced crevice attack

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