Tailoring the Hardening Behavior of 18CrNiMo7‐6 via Cu Alloying
Tailoring the Hardening Behavior of 18CrNiMo7‐6 via Cu Alloying
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通过铜合金化调整 18CrNiMo7â6 的硬化行为
DOI：
10.1002/srin.201500129
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发表时间：
2016
影响因子：
2.2
通讯作者：
A. Radulescu
中科院分区：
文献类型：
--
作者：
M. D. Bambach;W. Bleck;H. S. Kramer;M. Klein;D. Eifler;T. Beck;H. Surm;F. Hoffmann;H. W. Zoch;A. Radulescu
为了改善齿轮钢的滚动接触疲劳性能，提出了提高齿轮钢损伤容限的概念，替代了传统的提高钢的洁净度的方法。为此，以铜为主要合金化元素，以触发纳米铜析出物的析出，以提高铜合金化的18CrNiMo7-6钢在塑性变形过程中围绕非金属夹杂物的马氏体基体的应变硬化速度。以此方式，可以避免早期组件故障，并且可以保持例如风能转换器的低维护成本。实验分析表明，纳米铜析出物影响材料的强度、塑性和拉伸下的应变硬化行为，这取决于它们之间的一致性。其中，后者与共格铜的应变诱发马氏体相变有关。用透射电子显微镜和扫描电子显微镜研究了铜析出物的结构。用循环硬度试验(CHT)PHYBALCHT研究了铜合金钢的硬化指数。具有共格析出物的试件的疲劳试验显示循环硬化，直至达到临界应力幅值。在此基础上，检测到应力幅值循环软化。对于质量分数为1%的铜合金化18CrNiMo7-6钢，可获得较高的损伤容限。
In order to improve the rolling contact fatigue (RCF) behavior of gear steels, a concept to increase their damage tolerance is developed alternatively to the conventional approach of improving the degree of steel cleanliness. For that purpose, Cu is used as a main alloying element in order to trigger the precipitation of nano‐sized Cu precipitates which shall improve the strain‐hardening rate of the martensitic matrix of Cu‐alloyed 18CrNiMo7‐6 steel surrounding a non‐metallic inclusion during plastic deformation. In this way, early component failure may be avoided and the maintenance costs of, e.g., wind energy converters may be kept low. The experimental analysis shows that nano‐sized Cu precipitates influence the material's strength, ductility, and strain‐hardening behavior under tension, depending on their coherence. Among others, the latter is related to strain‐induced martensitic transformation of coherent Cu. The structure of the Cu precipitates is studied by TEM and SANS analysis. The Cu‐alloyed steel also shows an increased hardening‐exponentCHTstudied by cyclic hardness test (CHT) PHYBALCHT. Fatigue tests of specimens with coherent precipitates show cyclic hardening until a critical stress amplitude. Above that, stress amplitude cyclic softening is detected. An increased damage tolerance could be obtained for a 1 mass‐% Cu‐alloyed 18CrNiMo7‐6 steel.
缺陷、断裂和疲劳
DOI：
10.1007/978-94-009-6821-9
发表时间：
1983
期刊：
Metallurgical Transactions
影响因子：
--
作者：
G. Sih;J. Provan
通讯作者：
J. Provan
不同热处理状态下SAE 4140循环加载过程中的不均匀功软化
影响因子：
2.6
作者：
D. Eifler;E. Macherauch
通讯作者：
E. Macherauch