翻訳と辞書 Words near each other ・ Red-nosed mouse ・ Red-pate cisticola ・ Red-pea gall ・ Red-rimmed melania ・ Red-ruffed fruitcrow ・ Red-rumped agouti ・ Red-rumped bush tyrant ・ Red-rumped cacique ・ Red-rumped parrot ・ Red-rumped swallow ・ Red-rumped tinkerbird ・ Red-rumped warbling finch ・ Red-rumped wheatear ・ Red-rumped woodpecker ・ Red-shanked douc ・ Red-short ・ Red-shouldered blackbird ・ Red-shouldered cuckooshrike ・ Red-shouldered hawk ・ Red-shouldered macaw ・ Red-shouldered spinetail ・ Red-shouldered tanager ・ Red-shouldered vanga ・ Red-spectacled amazon ・ Red-spotted toad ・ Red-stained woodpecker ・ Red-striped goby ・ Red-suffusion rosy-faced lovebird mutation ・ Red-tailed amazon ・ Red-tailed ant thrush Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Red-short ： ウィキペディア英語版 Red-short Red-short, hot-short or Sulfur embrittlement is the quality possessed by carbon steel that suffers from having too much sulfur as an impurity. Iron or steel, when heated to above 900 °F (480 °C), glows with a red color. The color of any heated object changes predictably (due to black body radiation) from dull red through orange and yellow to white, and can be a useful indicator of its temperature. Good quality iron or steel at and above this temperature becomes increasingly malleable and plastic. Iron or steel having too much sulfur, on the other hand, becomes crumbly and brittle. This is due to the sulfur forming iron sulfide/iron mixtures in the grain boundaries of the metal which have a lower melting point than the steel.〔(Deev et al, Role of iron sulfide in the formation of cracks in weld joints ) Materials Science, Vol. 18, No. 3, pp. 109–112, May–June, 1982. 〕 When the steel is heated up and worked, the mechanical energy added to the workpiece increases the temperature further. The iron sulfide (FeS) or iron/iron sulfide alloy (which has an even lower melting point)〔(Sachinath Mitra. High-pressure geochemistry and mineral physics. ) p.1028〕 begins to melt, and the steel starts to separate at the grain boundaries. Steelmakers add manganese (Mn) to the steel when it is produced, to form manganese sulfide (MnS). Manganese sulfide inclusions have a higher melting point and do not concentrate at the grain boundaries. Thus, when the steel is later heated up and worked, the melting at the grain boundaries does not occur. ==References== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Red-short」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.