US20070000576A1 - Use of a non-corrosive, martensitically hardening steel - Google Patents

Use of a non-corrosive, martensitically hardening steel Download PDF

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Publication number
US20070000576A1
US20070000576A1 US10/533,295 US53329503A US2007000576A1 US 20070000576 A1 US20070000576 A1 US 20070000576A1 US 53329503 A US53329503 A US 53329503A US 2007000576 A1 US2007000576 A1 US 2007000576A1
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United States
Prior art keywords
tools
steel
rotary
machine
rotary tools
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Abandoned
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US10/533,295
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English (en)
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Bernd Blanke
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Sandvik Intellectual Property AB
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Individual
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Assigned to SANDVIK INTELLECTUAL PROPERTY AB reassignment SANDVIK INTELLECTUAL PROPERTY AB ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BLANKE, BERND
Publication of US20070000576A1 publication Critical patent/US20070000576A1/en
Abandoned legal-status Critical Current

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    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
    • 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
    • C22C38/004—Very low carbon steels, i.e. having a carbon content of less than 0,01%
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
    • 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
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium

Definitions

  • the invention relates to a novel use for precipitation-hardenable, martensitic, stainless steels for the manufacture of rotary tools for applications with high requirements as regards a combination of high hardness and ductility as well as corrosion resistance, such as drilling, milling, grinding and cutting tools.
  • Precipitation-hardenable, martensitic, stainless steels are known from WO 93/07303.
  • a composition of a stainless steel is described which has a very high strength with simultaneously good ductility.
  • This steel is described as being particularly suitable for the manufacture of injection cannulae, dental instruments and medical instruments on the basis of wire and strip material produced from the named types of steel. Because of the high hardness of the steel, further working had to be restricted to a minimum.
  • WO 01/14601 A1 a process is described for the manufacture of parts with complicated geometry by a series of process steps, including precipitation hardening, annealing, quenching and hardening, the result of which is a homogeneous hardness of at least 450 HV. It is mentioned by way of example that a precipitation-hardenable, martensitic, stainless steel can be used for the manufacture of medical instruments according to the process specified therein. The problem of workability was solved in this case with the help of the special manufacturing process, but this cannot be applied to tools, especially rotary tools with complicated geometry.
  • a range of boundary conditions should be satisfied for the use of a steel for the manufacture of machine-operated rotary tools, in particular rotary tools for medical, especially dental and surgical applications.
  • Drills, milling, grinding and cutting tools have very small diameters, according to their intended use, which can be less than 1 mm. However their length is great in relation to the diameter in order to make possible a specific working depth and is further increased by the section which is provided for the housing of the tool in the tool holder or chuck. Because of this extreme length/diameter ratio and the resulting unfavourable moment distribution, such tools are very sensitive to the bending loads applied in practical use. A slight bending, barely visible to the naked eye, of the drill can result in its generally running untrue and being unbalanced when next prepared by the operator or next used.
  • Martensitic, rustless steels e.g. the AISI 420 grades
  • Austenitic rustless steels e.g. the AISI 300 range
  • a marked cold reduction is required to achieve the high strength, and this means that the semi-finished product must also have a very high strength, which in turn leads to poor mouldability.
  • the precipitation-hardenable, rustless steels there are numerous different grades with different properties.
  • the object of the present invention is to overcome the aforementioned problems and disadvantages of the state of the art.
  • This object is achieved according to the invention through the use of a precipitation-hardenable, martensitic, rustless chrome nickel steel with the following composition (in wt.-%): Chromium 10 to 14 Nickel 7 to 11 Molybdenum 0.5 to 6 Copper 0.5 to 4 Aluminium 0.05 to 0.55 Titanium 0.4 to 1.4 Carbon + nitrogen up to 0.3 Sulphur less than 0.05 Phosphorus less than 0.05 Manganese up to 0.5 Silicon up to 0.5 Tantalum, niobium, vanadium and each up to 0.2 tungsten Cobalt where appropriate up to 9.0 Boron where appropriate 0.0001 to 0.1
  • Rotary tools according to the invention are preferably drilling, milling, grinding and cutting tools with or without geometrically defined cutting edges, particularly preferably machine-operated rotary cutting machine tools according to DIN 8580.
  • a tool comprises a shaft, a machining tool head and a mounting part. The tool is moved axially and/or transversely.
  • a surprising effect, covered by the invention, is that precipitation-hardenable, martensitic, stainless steel used in accordance with the invention is advantageous in applications in which the combination of high fracture and bending resistance with hardening and corrosion properties plays a crucial role.
  • the rotary tools are medical tools and instruments, in particular for dental and surgical application.
  • a further surprising effect, covered by the invention relates to the advantageous combination of good biological compatibility of the precipitation-hardenable, martensitic, rustless steel used according to the invention with good corrosion properties, high ductility and outstandingly high strength of approximately 2,500 to 3,000 N/mm 2 .
  • This combination permits the advantageous use of this steel in medical applications in which the material remains in the body of the patient for a shorter or longer period of time.
  • a steel composition particularly suitable according to the invention contains for example 12.0 wt.-% chromium, 9.1 wt.-% nickel, 4.0 wt.-% molybdenum, 2.0 wt.-% copper, 0.9 wt.-% titanium, 0.35 wt.-% aluminium, ⁇ 0.012 wt.-% carbon and ⁇ 0.012 wt.-% nitrogen.
  • the tested steel according to the invention is a composition according to the material 766685 given in table 2. Other embodiments can be seen in table 2. TABLE 2 Examples of steel compositions according to the invention Material C Si Mn P S Cr Ni Mo Ti Cu Al 766685 0.008 0.12 0.18 0.009 0.001 12.19 9.16 3.99 1.08 1.99 0.33 766757 0.01 0.13 0.27 0.011 0.001 11.85 9.0 3.95 0.97 1.96 0.33 451234 0.004 0.22 0.25 0.015 0.001 11.85 9.14 3.99 0.86 1.95 0.36 769228 0.008 0.11 0.21 0.006 0.001 12.05 9.15 3.96 0.90 1.99 0.34 768276 0.009 0.09 0.19 0.01 0.002 12.15 9.02 3.99 0.9 1.99 0.30 769014 0.008 0.08 0.25 0.01 0.001 11.99 9.12 4.07 0.82 1.99 0.37
  • the grades 1.4112 and 1.4108 whose compositions are given in table 1, were used as comparison steels.
  • the samples investigated were solid-material rods with a circular cross-section and a diameter of 4.5 mm. All the samples tested were precipitation-hardened.
  • the hardening of the steel according to the invention took place at 475° C. for 4 hours.
  • the hardening of the grades 1.4112 and 1.4108 took place according to the hardening processes prescribed for these steels, at 1000° C. for 40-60 minutes in vacuum. Both grades were then cooled to minus 50° C in nitrogen.
  • the material 1.4108 was additionally tempered at 160° C. for 2 hours.
  • the described processes for manufacture and working of the reference materials give the highest possible values for hardness and ductility.
  • FIG. 2 shows at (A) the fracture surface of the comparison material 1.4108 and at (B) the material according to the invention bent under identical test conditions.
  • the tools produced according to the invention combine hardness, maximum corrosion resistance, good biocompatibility and outstanding breaking strength in the products manufactured.
  • the products also remain fracture-resistant when bent and can be bent repeatedly, such as for example in plastic surgery, without sacrificing their outstanding material properties.
  • the steel grades used according to the invention have good workability and good milling properties when hardened, which proves advantageous in the manufacture of the products.
  • a further advantage of the use of the steel used according to the invention for the manufacture of rotary tools is the relatively low hardening temperature in the range 425 to 525° C., which results in substantial energy cost savings during manufacture.
  • tools are approved for repeated use they must fulfil particularly high requirements in respect of the corrosion resistance of the steel during sterilization.
  • Tools according to the invention were tested in accordance with DIN 1662 for their corrosion resistance.
  • the test conditions defined in DIN 1662 were then transferred to the disinfection solutions listed in table 4 and tools then optically tested for traces of corrosion.
  • Table 4 also shows the optical assessment appraisals.
  • the tests were carried out on tools with different surface finishes, i.e. ground, milled, electropolished and glass bead—or sand-blasted.
  • specific regulations apply to the identification of tools in the medical field, to prevent errors during use, particular attention has been paid to laser identification of same. Both the action of heat and also the areas which were more strongly mechanically worked, such as e.g.
  • FIG. 1 shows a possible version of the present invention in the form of a drill.
  • FIG. 2 shows the surface of fracture (A) of the comparison material 1.4108 and the material (B) according to the invention bent under identical test conditions.
  • FIG. 1 shows an embodiment of the present invention in the form of a drill for surgical use.
  • the length/diameter ratio of the tool is in this case approx. 72:1.
  • a length/diameter ratio of this order brings with it special requirements in respect of the flexural strength of the steel used, and these are met by the steel according to the invention, while avoiding the disadvantages named above.
  • FIG. 2 shows at (A) the surface of fracture obtained in the bending test of the above-described material 1.4108 and at (B) the material according to the invention bent under identical test conditions.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Materials For Medical Uses (AREA)
US10/533,295 2002-11-01 2003-10-22 Use of a non-corrosive, martensitically hardening steel Abandoned US20070000576A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251413.5 2002-11-01
DE10251413A DE10251413B3 (de) 2002-11-01 2002-11-01 Verwendung eines korrosionsbeständigen, martensitisch aushärtenden Stahls
PCT/EP2003/050743 WO2004040032A1 (de) 2002-11-01 2003-10-22 Verwendung eines korrosionsbeständigen, martensitisch aushärtenden stahls

Publications (1)

Publication Number Publication Date
US20070000576A1 true US20070000576A1 (en) 2007-01-04

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US10/533,295 Abandoned US20070000576A1 (en) 2002-11-01 2003-10-22 Use of a non-corrosive, martensitically hardening steel

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US (1) US20070000576A1 (de)
EP (1) EP1558777A1 (de)
CN (1) CN1708599A (de)
AU (1) AU2003301678A1 (de)
DE (1) DE10251413B3 (de)
WO (1) WO2004040032A1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090071313A1 (en) * 2005-12-07 2009-03-19 Sandvik Intellectual Property Ab Music string
US20100217236A1 (en) * 2006-08-18 2010-08-26 Renishaw Plc Neurological apparatus
CN102367556A (zh) * 2011-10-31 2012-03-07 铜陵狮达矿山机械有限公司 一种钎具钢及其制备方法
WO2012166851A1 (en) * 2011-06-02 2012-12-06 Aktiebolaget Skf Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
US20150075681A1 (en) * 2008-04-11 2015-03-19 Questek Innovations Llc Martensitic Stainless Steel Strengthened by Copper-Nucleated Nitride Precipitates
CN106062233A (zh) * 2014-01-16 2016-10-26 尤迪霍尔姆斯有限责任公司 不锈钢和由该不锈钢制成的切削工具主体
US10351922B2 (en) 2008-04-11 2019-07-16 Questek Innovations Llc Surface hardenable stainless steels
US11821465B2 (en) 2021-02-25 2023-11-21 Aktiebolaget Skf Heat-treated roller bearing ring

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE528454C3 (sv) * 2004-12-23 2007-01-09 Sandvik Intellectual Property Utskiljningshärdbart martensitiskt rostfritt stål innefattande titansulfid
JP6049331B2 (ja) 2012-07-03 2016-12-21 株式会社東芝 蒸気タービンの動翼、蒸気タービンの動翼の製造方法および蒸気タービン
AT15495U1 (de) * 2012-08-27 2017-10-15 Sihga GmbH Bohrwerkzeug
CN103334063A (zh) * 2013-06-26 2013-10-02 大连理工大学 一种无钴高强度马氏体时效不锈钢
CN104264027A (zh) * 2014-09-25 2015-01-07 无锡康柏斯机械科技有限公司 一种耐高温金属切削刀具及其制备方法
CN106086704B (zh) * 2016-08-19 2017-09-22 攀钢集团江油长城特殊钢有限公司 一种热轧钢板及其制备方法和应用
CN107805762A (zh) * 2016-09-09 2018-03-16 中国科学院金属研究所 一种具有耐海洋微生物腐蚀性能的低合金高强度钢
CN107254642B (zh) * 2017-06-02 2019-02-19 浙江大学 一种马氏体时效不锈钢及其制备方法
CN107326300A (zh) * 2017-06-20 2017-11-07 上海大学兴化特种不锈钢研究院 一种耐蚀抗菌医用外科器件马氏体不锈钢及其制备方法
CN110306122B (zh) * 2019-08-06 2021-05-11 鄱阳县黑金刚钓具有限责任公司 一种新型高强度材料鱼钩
CN113186472B (zh) * 2021-01-15 2022-07-22 江苏省沙钢钢铁研究院有限公司 耐蚀钢筋及其生产方法
CN113046654B (zh) * 2021-03-11 2023-12-08 哈尔滨工程大学 一种高塑性高强度高耐蚀不锈钢及其制备方法

Citations (2)

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Publication number Priority date Publication date Assignee Title
US3408871A (en) * 1964-06-27 1968-11-05 Telefunken Patent Transducer for angular motion
US5512237A (en) * 1991-10-07 1996-04-30 Sandvik Ab Precipitation hardenable martensitic stainless steel

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
US5411613A (en) * 1993-10-05 1995-05-02 United States Surgical Corporation Method of making heat treated stainless steel needles
SE520169C2 (sv) * 1999-08-23 2003-06-03 Sandvik Ab Metod för tillverkning av stålprodukter av utskiljningshärdat martensitiskt stål, samt användning av dessa stålprodukter
US6238455B1 (en) * 1999-10-22 2001-05-29 Crs Holdings, Inc. High-strength, titanium-bearing, powder metallurgy stainless steel article with enhanced machinability

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408871A (en) * 1964-06-27 1968-11-05 Telefunken Patent Transducer for angular motion
US5512237A (en) * 1991-10-07 1996-04-30 Sandvik Ab Precipitation hardenable martensitic stainless steel

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090071313A1 (en) * 2005-12-07 2009-03-19 Sandvik Intellectual Property Ab Music string
US7777108B2 (en) * 2005-12-07 2010-08-17 Sandvik Intellectual Property Ab Music string
US20100217236A1 (en) * 2006-08-18 2010-08-26 Renishaw Plc Neurological apparatus
US20120123391A1 (en) * 2006-08-18 2012-05-17 Renishaw (Ireland) Limited Neurological apparatus
US10351921B2 (en) 2008-04-11 2019-07-16 Questek Innovations Llc Martensitic stainless steel strengthened by copper-nucleated nitride precipitates
US10351922B2 (en) 2008-04-11 2019-07-16 Questek Innovations Llc Surface hardenable stainless steels
US20150075681A1 (en) * 2008-04-11 2015-03-19 Questek Innovations Llc Martensitic Stainless Steel Strengthened by Copper-Nucleated Nitride Precipitates
US10053763B2 (en) 2011-06-02 2018-08-21 Aktiebolaget Skf Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
WO2012166851A1 (en) * 2011-06-02 2012-12-06 Aktiebolaget Skf Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
US11667999B2 (en) 2011-06-02 2023-06-06 Ues Inc. Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance
CN102367556A (zh) * 2011-10-31 2012-03-07 铜陵狮达矿山机械有限公司 一种钎具钢及其制备方法
US20160333449A1 (en) * 2014-01-16 2016-11-17 Uddeholms Ab Stainless steel and a cutting tool body made of the stainless steel
CN106062233A (zh) * 2014-01-16 2016-10-26 尤迪霍尔姆斯有限责任公司 不锈钢和由该不锈钢制成的切削工具主体
US11821465B2 (en) 2021-02-25 2023-11-21 Aktiebolaget Skf Heat-treated roller bearing ring

Also Published As

Publication number Publication date
WO2004040032A1 (de) 2004-05-13
EP1558777A1 (de) 2005-08-03
AU2003301678A1 (en) 2004-05-25
CN1708599A (zh) 2005-12-14
DE10251413B3 (de) 2004-03-25

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Owner name: SANDVIK INTELLECTUAL PROPERTY AB, SWEDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BLANKE, BERND;REEL/FRAME:018359/0642

Effective date: 20060820

STCB Information on status: application discontinuation

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