EA200702268A1 - METHOD OF ADDING BORON TO METAL ALLOYS - Google Patents

METHOD OF ADDING BORON TO METAL ALLOYS

Info

Publication number
EA200702268A1
EA200702268A1 EA200702268A EA200702268A EA200702268A1 EA 200702268 A1 EA200702268 A1 EA 200702268A1 EA 200702268 A EA200702268 A EA 200702268A EA 200702268 A EA200702268 A EA 200702268A EA 200702268 A1 EA200702268 A1 EA 200702268A1
Authority
EA
Eurasian Patent Office
Prior art keywords
alloy
boron
precious metal
precursor
metal
Prior art date
Application number
EA200702268A
Other languages
Russian (ru)
Inventor
Самьюэл Альберт Дэвис
Питер Гэймон Джонс
Нейл Дэлтон Бейкер
Джон Рискалла
Ричард В. Каррано
Original Assignee
Стерн Лич Компани
Миддлсекс Силвери Ко Лимитед
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
Priority claimed from US11/132,621 external-priority patent/US20060260778A1/en
Application filed by Стерн Лич Компани, Миддлсекс Силвери Ко Лимитед filed Critical Стерн Лич Компани
Publication of EA200702268A1 publication Critical patent/EA200702268A1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B11/00—Obtaining noble metals
    • C22B11/02—Obtaining noble metals by dry processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/103—Methods of introduction of solid or liquid refining or fluxing agents
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
    • C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
    • C22B9/106—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents the refining being obtained by intimately mixing the molten metal with a molten salt or slag
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/02—Alloys based on gold
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C5/00—Alloys based on noble metals
    • C22C5/06—Alloys based on silver
    • C22C5/08—Alloys based on silver with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper

Abstract

Способ уменьшения размера гранул и восстановления сплава или лигатуры драгоценного металла включает стадии (а) формования расплава предшественника (10), по существу, состоящего из составляющих сплава или лигатуры драгоценного металла и неизбежных загрязняющих примесей; (b) диспергирования (14) соединения, выбранного из группы, включающей борсодержащие гидриды металлов, борсодержащие фториды металлов и их смеси, по всей массе расплава предшественника; и (с) затвердевания (20) борсодержащего драгоценного расплавленного сплава или лигатуры. Одним из подходящих соединений является твердый боргидрид натрия (тетрагидроборат натрия). С целью сведения к минимуму испарения бора при контакте с расплавом сплава предшественника борогидрид натрия может быть завернут в металлическую фольгу, изготовленную из составляющих сплава или лигатуры драгоценного металла. Было установлено, что отлитый сплав или лигатура драгоценного металла имеет меньшее количество твердых мест и более низкий уровень загрязнения кремнием по сравнению с известными способами литья.The method for reducing the size of the granules and recovering the precious metal alloy or master alloy includes the steps of (a) forming a precursor melt (10) essentially consisting of precious metal alloy or master alloy constituents and unavoidable contaminants; (b) dispersing (14) a compound selected from the group consisting of boron-containing metal hydrides, boron-containing metal fluorides and mixtures thereof, throughout the mass of the precursor melt; and (c) solidifying (20) the boron-containing precious molten alloy or master alloy. One suitable compound is solid sodium borohydride (sodium tetrahydroborate). In order to minimize the evaporation of boron upon contact with the precursor alloy melt, sodium borohydride can be wrapped in a metal foil made from the constituents of the alloy or alloy of the precious metal. It has been found that the cast precious metal alloy or ligature has fewer hard spots and a lower level of silicon contamination than known casting methods.

EA200702268A 2005-04-19 2006-04-19 METHOD OF ADDING BORON TO METAL ALLOYS EA200702268A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US67256605P 2005-04-19 2005-04-19
US11/132,621 US20060260778A1 (en) 2005-05-19 2005-05-19 Method for adding boron to metal alloys
US73278405P 2005-11-02 2005-11-02
US11/405,188 US20060231171A1 (en) 2005-04-19 2006-04-17 Method for adding boron to metal alloys
PCT/US2006/014835 WO2006113847A2 (en) 2005-04-19 2006-04-19 Method for adding boron to metal alloys

Publications (1)

Publication Number Publication Date
EA200702268A1 true EA200702268A1 (en) 2008-04-28

Family

ID=38820142

Family Applications (1)

Application Number Title Priority Date Filing Date
EA200702268A EA200702268A1 (en) 2005-04-19 2006-04-19 METHOD OF ADDING BORON TO METAL ALLOYS

Country Status (9)

Country Link
US (1) US20060231171A1 (en)
EP (1) EP1877588A2 (en)
JP (1) JP2008538387A (en)
AU (1) AU2006236256A1 (en)
CA (1) CA2605502A1 (en)
EA (1) EA200702268A1 (en)
MX (1) MX2007012881A (en)
TW (1) TW200641157A (en)
WO (1) WO2006113847A2 (en)

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CN111489899B (en) * 2020-03-07 2022-06-07 浙江福达合金材料科技有限公司 Preparation method of silver tungsten carbide electrical contact material
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RU2741609C1 (en) * 2020-05-28 2021-01-27 Акционерное общество "ГОЗНАК" Method of producing composite multilayer article based on and multilayer article

Also Published As

Publication number Publication date
WO2006113847A3 (en) 2007-07-19
CA2605502A1 (en) 2006-10-26
MX2007012881A (en) 2008-02-12
WO2006113847A8 (en) 2007-11-29
TW200641157A (en) 2006-12-01
US20060231171A1 (en) 2006-10-19
AU2006236256A1 (en) 2006-10-26
EP1877588A2 (en) 2008-01-16
JP2008538387A (en) 2008-10-23
WO2006113847A2 (en) 2006-10-26

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