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| 1 | DETERMINATION AND APPLICATION OF LARSON-MILLER PARAMETER FOR HEAT RESISTANT STEEL 12CrlMoV AND 15CrMo显示文摘Based on the analysis and processing on relative empirical formula and data, C-values in Larson-Miller (P) expression, P = T(C + lgt), have determined for pearlitic heat resistant steel 12Cr1Mo V and 15 CrMo (20. 62 and 20. 30). The simulation experiments of high temperature aging, heated from 1.5 to 873 hours, have been designed and performed for its verification. And in combination with published information and the present nearly quantitative works, it has further been verified that both the degradations of microstructures and mechanical properties show a good accuracy and practicability using the Larson-Miller parameter with the present determined C-values. Finally, the effects of carbon content on C-value are analyzed by the empirical electron theory of solids and molecules (EET). | R.C.Yang K.Chen H.X.Feng H.Wang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，4： | 14 |
| 2 | VARIATION OF SUBSTRUCTURES OF PEARLITIC HEAT RESISTANT STEEL AFTER HIGH TEMPERATURE AGING显示文摘The observations of dislocations, substructures and other microstructural details were conducted mainly by means of transmission electron microscope (TEM) and scanning electron microscope (SEM) for 12Cr1Mo V pearlitic heat-resistant steel. It is shown that during the high temperature long-term aging, the disordered and jumbled phasetransformed dislocations caused by normalized cooling are recovered and rearranged into cell substructures, and then the dislocation density is reduced gradually. Finally a low density linear dislocation configuration and a stabler dislocation network are formed and ferritic grains grow considerably. | R.C.Yang K.Chen H.X.Feng H.Wang | 2004 | Acta Metallurgica Sinica(English Letters)2004，17，4： | 2 |
| 3 | 施肥对木材密度和管胞长度的影响显示文摘木材密度和管胞长度与木材强度、纸浆得率有直接关系,因此它们影响木材的利用。施肥加速树木生长,提高林分产量,但是林业工作者担心由于速生而影响木材质量。由于经济的关系。 | R.C.YANG 张钢 | 1989 | 国外林业1989，19，2： | 0 |
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