The martensite microstructure,amount of retained austenite and its carbon concentration in the 40CrNiMo steel quenched at various conditions have been investigated by using trans- mission Mossbauer spectroscopy at roo...The martensite microstructure,amount of retained austenite and its carbon concentration in the 40CrNiMo steel quenched at various conditions have been investigated by using trans- mission Mossbauer spectroscopy at room temperature.It was shown that high-temperature quenching and thermomechanical quenching has little influence on amount of retained austenite,thus the toughening effect of quenching was attributed to bulk lath martensite and its refining.展开更多
The first aliphatic phosphenium cation featuring a P-S bond (dimethylamino)(methylthio)phosphenium cation 1.has been prepared by treatument of the (dimethylamino)(methylthio) chlorophosphines 2 wih the stoichiometri q...The first aliphatic phosphenium cation featuring a P-S bond (dimethylamino)(methylthio)phosphenium cation 1.has been prepared by treatument of the (dimethylamino)(methylthio) chlorophosphines 2 wih the stoichiometri quantity of AlCl3 in CH2Cl2 solution, and charcterized by 1H 13C 27Al and 31P NMR spectroseopy展开更多
文摘The martensite microstructure,amount of retained austenite and its carbon concentration in the 40CrNiMo steel quenched at various conditions have been investigated by using trans- mission Mossbauer spectroscopy at room temperature.It was shown that high-temperature quenching and thermomechanical quenching has little influence on amount of retained austenite,thus the toughening effect of quenching was attributed to bulk lath martensite and its refining.
文摘The first aliphatic phosphenium cation featuring a P-S bond (dimethylamino)(methylthio)phosphenium cation 1.has been prepared by treatument of the (dimethylamino)(methylthio) chlorophosphines 2 wih the stoichiometri quantity of AlCl3 in CH2Cl2 solution, and charcterized by 1H 13C 27Al and 31P NMR spectroseopy
