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首页> 外文期刊>Materials Science and Engineering >Effects of C and N on high-temperature deformation behavior of 15Cr-15Mn-4Ni austenitic stainless steels
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Effects of C and N on high-temperature deformation behavior of 15Cr-15Mn-4Ni austenitic stainless steels

机译：C和N对15Cr-15mn-4Ni奥氏体不锈钢高温变形行为的影响

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摘要

The effect of interstitial C and N atoms on high-temperature deformation behavior was investigated in 15Cr-15Mn-4Ni austenitic stainless steels containing 0.1-0.3 wt% of either C or N. Single-hit compression tests were performed in the deformation temperature range 800-1100 °C and the strain rate range 0.01-1 s~(-1). In both C-added (+C) and N-added (+N) steels, the high-temperature strength, i.e. mean flow stress, increased as the concentration of C or N increased. At the same level of C or N concentration, the mean flow stress, activation energy for high-temperature deformation, and degree of lattice expansion were larger in +N-steels than in +C-steels, whereas the dynamically recrystallized grain size and grain growth rate were larger and faster in +C-steels than in +N-steels. The higher strength of +N-steels over + C-steels at a wide range of temperatures was attributed to the stronger solid solution hardening effect of N atoms compared to C atoms. Dynamic recrystal-lization was relatively retarded in the +N-steels, because N atoms interacted strongly with grain boundaries.
机译：在15Cr-15Mn-4Ni奥氏体不锈钢中研究了间质性C和N原子对高温变形行为的影响，其含有0.1-0.3wt％的C或N.1-0.3wt％的奥氏体不锈钢。在变形温度范围内进行单次命中压缩试验。 -1100°C和应变率范围0.01-1 S〜（-1）。在C加入（+ C）和N-加入（+ N）钢中，高温强度，即平均流量应力，随着C或N的浓度增加而增加。在相同的C或N浓度的水平下，平均流量应力，用于高温变形的激活能量，并且晶格膨胀程度比+ C钢较大，而动态再结晶晶粒尺寸和晶粒生长速率比+正钢更大且+ C钢更快。在各种温度下，+正钢的+正钢的较高强度归因于N原子的较强的固溶硬化效果与C原子相比。在+正钢中相对延迟动态再串掺杂，因为n原子与晶界强烈相互作用。

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