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powder metallurgy part

  • 1 изделие порошковой металлургии

    1. powder metallurgy part

     

    изделие порошковой металлургии
    Фасонное изделие, изготовленное из металлических порошков путем формования и спекания при температуре ниже точки плавления основного компонента. Деталь, изготовленная методом порошковой металлургии.
    [ http://www.manual-steel.ru/eng-a.html]

    Тематики

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    Русско-английский словарь нормативно-технической терминологии > изделие порошковой металлургии

  • 2 धातुः _dhātuḥ

    धातुः [धा-आधारे तुन्]
    1 A constituent or essential part, an ingredient.
    -2 An element, primary or ele- mentary substance, i. e. पृथिवी, अप्, तेजस्, वायु and आकाश; Bhāg.7.15.6.
    -3 A secretion, primary fluid or juice, essential ingredients of the body (which are considered to be 7:-- रसासृङ्मांसमेदो$स्थिमज्जाशुक्राणि धातवः, or sometimes ten if केश, त्वच् and स्नायु be added); Mb.3.213.1.
    -4 A humour or affection of the body, (i.e. वात, पित्त and कफ); यस्यात्मबुद्धिः कुणपे त्रिधातुके Bhāg.1.84.13.
    -5 A mineral, metal, metallic ore; न्यस्ताक्षरा धातुरसेन यत्र Ku.1.7; त्वामालिख्य प्रणयकुपितां धातुरागैः शिलायाम् Me.17; R.4.71; Ku.6.51.
    -6 A verbal root; भूवादयो धातवः P.I.3.1; पश्चादध्ययनार्थस्य धातोरधिरिवाभवत् R.15.9.
    -7 The soul.
    -8 The Supreme Spirit; धातुप्रसादान्महिमानमात्मनः Kaṭha.
    -9 An organ of sense.
    -1 Any one of the properties of the five elements, i. e. रूप, रस, गन्ध, स्पर्श and शब्द; तत्र तत्र हि दृश्यन्ते धातवः पाञ्चभौतिकाः । तेषां मनुष्यास्तर्केण प्रमाणानि प्रचक्षते Mb.6.5.11.
    -11 A bone.
    -12 A part, portion.
    -13 A fluid mineral of a red colour.
    -14 Ved. A supporter.
    -15 Anything to be drunk, as milk &c. -f. A milch cow.
    -Comp. -उपलः chalk.
    -काशीशम्, -कासीसम् red sulphate of iron.
    -कुशल a. skilful in working in metals, metallurgist.
    -क्रिया metallurgy, mineralogy
    -क्षयः waste of the bodily humours, a wasting disease, a kind of consumption.
    -गर्भः, -स्तपः a receptacle for ashes, Dagoba; Buddh. ˚कुम्भः a relic urn.
    -ग्राहिन् m. calamine.
    -घ्नम्, -नाशनम् sour gruel (prepared from the fermentation of rice-water).
    -चूर्णम् mineral powder.
    -जम् bitumen
    -द्रावकः borax.
    -पः the alimentary juice, the chief of the seven essential ingredients of the body.
    -पाठः a list of roots arranged according to Pāṇini's grammatical system (the most important of these lists called धातुपाठ being supposed to be the work of Pāṇini himself, as supplementary to his Sūtras).
    -पुष्टिः f. nutrition of the bodily humours.
    -प्रसक्त a. devoted to alchemy;
    -भृत् m. a mountain.
    -मलम् 1 impure excretion of the essential fluids of the body; कफपित्तमलाः केशः प्रस्वेदो नखरोम च । नेत्रविट् चक्षुषः स्नेहो धातूनां क्रमशो मलाः ॥ Suśruta.
    -2 lead.
    -माक्षिकम् 1 sulphuret of iron.
    -2 a mineral substance.
    -मारिणी borax.
    -मारिन् m. sulphur.
    -रसः a mineral or metalic fluid; न्यस्ताक्षरा धातुरसेन यत्र (भूर्जत्वचः) Ku.1.7.
    -राजकः, -कम् semen.
    -वल्लभम् borax.
    -वादः 1 mineralogy, metal- lurgy.
    -2 alchemy.
    -वादिन् m. a mineralogist.
    -विष् f. lead.
    -वैरिन् m. sulphur.
    -शेखरन् green sulphate of iron, green vitriol.
    -शोधनम्, -संभवम् lead.
    -साम्यम् good health, (equilibrium of the three humours).
    -हन् m. sulphur.

    Sanskrit-English dictionary > धातुः _dhātuḥ

  • 3 Bessemer, Sir Henry

    SUBJECT AREA: Metallurgy
    [br]
    b. 19 January 1813 Charlton (near Hitchin), Hertfordshire, England
    d. 15 January 1898 Denmark Hill, London, England
    [br]
    English inventor of the Bessemer steelmaking process.
    [br]
    The most valuable part of Bessemer's education took place in the workshop of his inventor father. At the age of only 17 he went to London to seek his fortune and set himself up in the trade of casting art works in white metal. He went on to the embossing of metals and other materials and this led to his first major invention, whereby a date was incorporated in the die for embossing seals, thus preventing the wholesale forgeries that had previously been committed. For this, a grateful Government promised Bessemer a paid position, a promise that was never kept; recognition came only in 1879 with a belated knighthood. Bessemer turned to other inventions, mainly in metalworking, including a process for making bronze powder and gold paint. After he had overcome technical problems, the process became highly profitable, earning him a considerable income during the forty years it was in use.
    The Crimean War presented inventors such as Bessemer with a challenge when weaknesses in the iron used to make the cannon became apparent. In 1856, at his Baxter House premises in St Paneras, London, he tried fusing cast iron with steel. Noticing the effect of an air current on the molten mixture, he constructed a reaction vessel or converter in which air was blown through molten cast iron. There was a vigorous reaction which nearly burned the house down, and Bessemer found the iron to be almost completely decarburized, without the slag threads always present in wrought iron. Bessemer had in fact invented not only a new process but a new material, mild steel. His paper "On the manufacture of malleable iron and steel without fuel" at the British Association meeting in Cheltenham later that year created a stir. Bessemer was courted by ironmasters to license the process. However, success was short-lived, for they found that phosphorus in the original iron ore passed into the metal and rendered it useless. By chance, Bessemer had used in his trials pig-iron, derived from haematite, a phosphorus-free ore. Bessemer tried hard to overcome the problem, but lacking chemical knowledge he resigned himself to limiting his process to this kind of pig-iron. This limitation was removed in 1879 by Sidney Gilchrist Thomas, who substituted a chemically basic lining in the converter in place of the acid lining used by Bessemer. This reacted with the phosphorus to form a substance that could be tapped off with the slag, leaving the steel free from this harmful element. Even so, the new material had begun to be applied in engineering, especially for railways. The open-hearth process developed by Siemens and the Martin brothers complemented rather than competed with Bessemer steel. The widespread use of the two processes had a revolutionary effect on mechanical and structural engineering and earned Bessemer around £1 million in royalties before the patents expired.
    [br]
    Principal Honours and Distinctions
    Knighted 1879. FRS 1879. Royal Society of Arts Albert Gold Medal 1872.
    Bibliography
    1905, Sir Henry Bessemer FRS: An Autobiography, London.
    LRD

    Biographical history of technology > Bessemer, Sir Henry

  • 4 Dow, Herbert Henry

    SUBJECT AREA: Metallurgy
    [br]
    b. 26 February 1866 Belleville, Ontario, Canada
    d. 15 October 1930 Rochester, Minnesota, USA
    [br]
    American industrial chemist, pioneer manufacturer of magnesium alloys.
    [br]
    Of New England ancestry, his family returned there soon after his birth and later moved to Cleveland, Ohio. In 1884, Dow entered the Case School of Applied Science, graduating in science four years later. His thesis dealt partly with the brines of Ohio, and he was persuaded to present a paper on brine to the meeting of the American Association for he Advancement of Science being held in Cleveland the same year. That entailed visits to collect samples of brines from various localities, and led to the observation that their composition varied, one having a higher lithium content while another was richer in bromine. This study of brines proved to be the basis for his career in industrial chemistry. In 1888 Dow was appointed Professor of Chemistry at the Homeopathic Hospital College in Cleveland, but he continued to work on brine, obtaining a patent in the same year for extracting bromine by blowing air through slightly electrolysed brine. He set up a small company to exploit the process, but it failed; the process was taken up and successfully worked by the Midland Chemical Company in Midland, Michigan. The electrolysis required a direct-current generator which, when it was installed in 1892, was probably the first of its kind in America. Dow next set up a company to produce chlorine by the electrolysis of brine. It moved to Midland in 1896, and the Dow Central Company purchased the Midland Chemical Company in 1900. Its main concern was the manufacture of bleaching powder, but the company continued to grow, based on Dow's steady development of chemical compounds that could be derived from brines. His search for further applications of chlorine led to the making of insecticides and an interest in horticulture. Meanwhile, his experience at the Homeopathic Hospital doubtless fired an interest in pharmaceuticals. One of the substances found in brine was magnesium chloride, and by 1918 magnesium metal was being produced on a small scale by electrolysis. An intensive study of its alloys followed, leading to the large-scale production of these important light-metal alloys, under the name of Dowmetals. Two other "firsts" achieved by the company were the synthetic indigo process and the production of the element iodine in the USA. The Dow company became one of the leading chemical manufacturers in the USA, and at the same time Dow played an active part in public life, serving on many public and education boards.
    [br]
    Principal Honours and Distinctions
    Society of Chemical Industry Perkin Medal 1930.
    Bibliography
    Dow was granted 65 patents for a wide range of chemical processes.
    Further Reading
    Obituary, 1930, Ind. Eng. Chem. (October).
    "The Dow Chemical Company", 1925, Ind. Eng. Chem. (September)
    LRD

    Biographical history of technology > Dow, Herbert Henry

См. также в других словарях:

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  • изделие порошковой металлургии — Фасонное изделие, изготовленное из металлических порошков путем формования и спекания при температуре ниже точки плавления основного компонента. Деталь, изготовленная методом порошковой металлургии. [http://www.manual steel.ru/eng a.html]… …   Справочник технического переводчика

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