US3809583A - Solid agent for boriding metals - Google Patents

Solid agent for boriding metals Download PDF

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Publication number
US3809583A
US3809583A US00253515A US25351572A US3809583A US 3809583 A US3809583 A US 3809583A US 00253515 A US00253515 A US 00253515A US 25351572 A US25351572 A US 25351572A US 3809583 A US3809583 A US 3809583A
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US
United States
Prior art keywords
boriding
boron
metals
powder
solid agent
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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
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US00253515A
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English (en)
Inventor
H Krzyminski
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.)
DEUTSCHE GOLD und SILBER SCHEIDEANSTALT DT
Evonik Operations GmbH
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Degussa GmbH
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
    • C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
    • C23C8/68—Boronising
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/60—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes
    • C23C8/62—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using solids, e.g. powders, pastes only one element being applied
    • C23C8/68—Boronising
    • C23C8/70—Boronising of ferrous surfaces

Definitions

  • the boriding of steels which leads to very hard surface layers and therefore continually is finding greater use in the solution of problems of wearing out in prefabricated parts and tools is preferably carried out in a boron yielding powder.
  • This process requires only a small expenditure for apparatus.
  • the component parts are arranged in a box and surrounded with the boron yielding powder. After that the box is pushed into a suitable furnace and treated for several hours at temperatures of the order of 800 to 1100 C. After that the box is taken out of the furnace, cooled 01f and then emptied.
  • boriding powder there are used mixtures which consist of a boron yielding constituent, as for example, amorphous boron, crystalline boron, ferroboron, boron carbide, borax and mixtures of these materials. There can also be present activating additives. Finally there can be added to these boriding powders fillers or diluents. Through the boriding there arise layers which can be formed of the ductile Fe B or the more brittle FeB or both. An adjustment in the proportion of FeB to Fe B in many cases is desirable.
  • the quality of the boride layer can be so regulated that the boriding powders contain lower or higher concentrations of the boron yielding agent or are variably strongly activated. Also the quality of the steel of the part to be borided has an influence on the composition of the boriding powder, so that also control of the boriding powder composition in view of the choice of steel appears desirable.
  • the second severe disadvantage is the fact that the desired regulation of the boriding action is realized only poorly in practice due to the change of the concentration of the boriding constituent because the suggested mixtures on occasion incline to separate into their components.
  • the product does not tend to sinter together in carrying out the boriding treatment. After carrying out the boriding treatment and cooling off it can be easily discharged from the boxes and is immediately suitable for a further use. Besides the composition, once it is produced by mixing, remains constant even after frequent used and this is true even if the individual granules become mechanically abraded during the multiple use.
  • boron yielding constituent there can be employed any of the conventional materials such as amorphous boron, crystalline boron, ferroboron, boron carbide, boric anhydride and borax or mixtures of these materials in any proportion.
  • activating materials there can be used those customary in the art, e.g. ammonium, alkaline metal and alkaline earth metal halides such as ammonium chloride, potassium chloride, sodium chloride, calcium chloride, barium chloride, potassium fluoride, barium fluoride, magnesium fluoride, sodium bromide, sodium fluoride and calcium bromide as well as mixtures thereof.
  • ammonium chloride potassium chloride, sodium chloride, calcium chloride, barium chloride, potassium fluoride, barium fluoride, magnesium fluoride, sodium bromide, sodium fluoride and calcium bromide as well as mixtures thereof.
  • the composition can also contain the customary diluents such as graphite, silicon carbide, aluminum oxide and other stable compounds.
  • the amount of activating agent is usually between 2 and 15%.
  • the amount of boron containing material is usually at least 10% of the composition and usually 30 to weight percent, preferably 82 weight percent. When a diluent is employed, it is used in an amount of 5 to 88%.
  • the binder there can be used in place of charcoal tar other carbonaceous materials such as organic oils.
  • the binder is usually used to provide carbon in an amount of 2 to 40% of the composition.
  • the annealing of the pressed materials to remove volatile materials can take place at 400 to 600 0., preferably 450 C. for 0.5 to 2 hours.
  • the pressing can be done at pressures of 2 to 25 kg./crn.
  • the boriding treatment can take place as is customary at 800 to 1100 C.
  • the boriding treatment is primarily adapted to the boriding of iron and steel but can be used to boride other metals such as nickel and molybdenum.
  • a cylindrical granulate 2 composed of boron carbide composition 4 bound together by a carbon framework 6.
  • the granules usually have a height of 2 to 6 mm. and diameter of 1.5 to 4 mm.
  • EXAMPLE 2 The experiment was carried out as in Example 1. However, in each new treatment 15% of fresh boriding agent of the described type was added. As a result in all cases (i.e. the four samples) the thickness of the boriding layer was 230 to 240 millimicrons.
  • a solid agent for boriding metals comprising a pressed granulate of intimately mixed boron providing compound and activator.
  • a boriding agent according to claim 1 wherein the boron providing compound is selected from the group consisting of amorphous boron, crystalline boron, ferroboron, boron carbide and borax.
  • a boriding agent according to claim 1 wherein the granulate is annealed to 400 to 600 C.
  • a boriding agent according to claim 1 wherein the activating agent is selected from the group consisting of potassium chloride, sodium chloride, ammonium-ehloride, calcium chloride, barium fluoride and magnesium fluoride.
  • a boriding agent according to claim 1 wherein the boron containing material is 10 to 90 weight percent of the granulate.
  • a boriding agent according to claim 8 wherein the carbon content of the granulate is between 2 and weight percent.
  • a boriding agent according to claim 1 wherein the particle size of the boriding product is 0.4 to 12 mm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
US00253515A 1971-06-01 1972-05-15 Solid agent for boriding metals Expired - Lifetime US3809583A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2127096A DE2127096C3 (de) 1971-06-01 1971-06-01 Verfahren zum Borieren von Metallen, insbesondere von Stahl und Eisen

Publications (1)

Publication Number Publication Date
US3809583A true US3809583A (en) 1974-05-07

Family

ID=5809476

Family Applications (1)

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US00253515A Expired - Lifetime US3809583A (en) 1971-06-01 1972-05-15 Solid agent for boriding metals

Country Status (9)

Country Link
US (1) US3809583A (enrdf_load_stackoverflow)
JP (1) JPS5121383B1 (enrdf_load_stackoverflow)
AT (1) AT313666B (enrdf_load_stackoverflow)
BR (1) BR7203538D0 (enrdf_load_stackoverflow)
DE (1) DE2127096C3 (enrdf_load_stackoverflow)
FR (1) FR2139869B1 (enrdf_load_stackoverflow)
GB (1) GB1384171A (enrdf_load_stackoverflow)
IT (1) IT954646B (enrdf_load_stackoverflow)
SE (1) SE379558B (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936327A (en) * 1972-09-07 1976-02-03 Elektroschmelzwerk Kempten Gmbh Boriding composition
WO1983000106A1 (en) * 1981-07-02 1983-01-20 Turbine Metal Technology Inc Erosion resistant tubular apparatus for handling slurries
US4637837A (en) * 1984-08-23 1987-01-20 Elektroschmelzwerk Kempten Gmbh Process for boriding metals and metal alloys by means of solid boriding agents
US4806175A (en) * 1983-06-25 1989-02-21 Korber Ag Method of surface hardening ferrous workpieces
US6245162B1 (en) * 1998-07-09 2001-06-12 Houghton Durferrit Gmbh Boriding agent
US20050208213A1 (en) * 2002-11-15 2005-09-22 University Of Utah Research Foundation Titanium boride coatings on titanium surfaces and associated methods
US20070018139A1 (en) * 2005-05-10 2007-01-25 Chandran K S R Nanostructured titanium monoboride monolithic material and associated methods
US20100176339A1 (en) * 2009-01-12 2010-07-15 Chandran K S Ravi Jewelry having titanium boride compounds and methods of making the same
US20130243955A1 (en) * 2012-03-14 2013-09-19 Andritz Iggesund Tools Inc. Process and apparatus to treat metal surfaces
US10870912B2 (en) 2017-03-14 2020-12-22 Bwt Llc Method for using boronizing reaction gases as a protective atmosphere during boronizing, and reaction gas neutralizing treatment
US11192792B2 (en) 2017-03-14 2021-12-07 Bwt Llc Boronizing powder compositions for improved boride layer quality in oil country tubular goods and other metal articles

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2361017C3 (de) * 1973-12-04 1985-12-05 Vac-Hyd Processing Gmbh, 2358 Kaltenkirchen Verfahren zum Borieren der Oberfläche eines metallischen Werkstücks
US4555326A (en) * 1984-05-17 1985-11-26 Betz Laboratories, Inc. Methods and compositions for boronizing metallic surfaces
RU2154695C1 (ru) * 1999-10-27 2000-08-20 Московский государственный агроинженерный университет им. В.П. Горячкина Способ восстановления и упрочнения стальных деталей

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936327A (en) * 1972-09-07 1976-02-03 Elektroschmelzwerk Kempten Gmbh Boriding composition
WO1983000106A1 (en) * 1981-07-02 1983-01-20 Turbine Metal Technology Inc Erosion resistant tubular apparatus for handling slurries
US4389439A (en) * 1981-07-02 1983-06-21 Turbine Metal Technology, Inc. Erosion resistant tubular apparatus for handling slurries
US4806175A (en) * 1983-06-25 1989-02-21 Korber Ag Method of surface hardening ferrous workpieces
US4637837A (en) * 1984-08-23 1987-01-20 Elektroschmelzwerk Kempten Gmbh Process for boriding metals and metal alloys by means of solid boriding agents
US6245162B1 (en) * 1998-07-09 2001-06-12 Houghton Durferrit Gmbh Boriding agent
US7264682B2 (en) 2002-11-15 2007-09-04 University Of Utah Research Foundation Titanium boride coatings on titanium surfaces and associated methods
US20050208213A1 (en) * 2002-11-15 2005-09-22 University Of Utah Research Foundation Titanium boride coatings on titanium surfaces and associated methods
US20070018139A1 (en) * 2005-05-10 2007-01-25 Chandran K S R Nanostructured titanium monoboride monolithic material and associated methods
US7459105B2 (en) 2005-05-10 2008-12-02 University Of Utah Research Foundation Nanostructured titanium monoboride monolithic material and associated methods
US7501081B2 (en) 2005-05-10 2009-03-10 University Of Utah Research Foundation Nanostructured titanium monoboride monolithic material and associated methods
US20100176339A1 (en) * 2009-01-12 2010-07-15 Chandran K S Ravi Jewelry having titanium boride compounds and methods of making the same
US20130243955A1 (en) * 2012-03-14 2013-09-19 Andritz Iggesund Tools Inc. Process and apparatus to treat metal surfaces
US8894770B2 (en) * 2012-03-14 2014-11-25 Andritz Iggesund Tools Inc. Process and apparatus to treat metal surfaces
US9068260B2 (en) 2012-03-14 2015-06-30 Andritz Iggesund Tools Inc. Knife for wood processing and methods for plating and surface treating a knife for wood processing
US10870912B2 (en) 2017-03-14 2020-12-22 Bwt Llc Method for using boronizing reaction gases as a protective atmosphere during boronizing, and reaction gas neutralizing treatment
US11192792B2 (en) 2017-03-14 2021-12-07 Bwt Llc Boronizing powder compositions for improved boride layer quality in oil country tubular goods and other metal articles

Also Published As

Publication number Publication date
GB1384171A (en) 1975-02-19
JPS5121383B1 (enrdf_load_stackoverflow) 1976-07-02
DE2127096A1 (de) 1972-12-14
DE2127096B2 (de) 1978-11-02
IT954646B (it) 1973-09-15
FR2139869A1 (enrdf_load_stackoverflow) 1973-01-12
AT313666B (de) 1974-02-25
BR7203538D0 (pt) 1973-05-10
FR2139869B1 (enrdf_load_stackoverflow) 1976-08-06
DE2127096C3 (de) 1980-11-06
SE379558B (enrdf_load_stackoverflow) 1975-10-13

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