eutectoid
简明释义
adj. 共析的；[冶] 类低共熔体的
n. [冶] 类低共熔体
英英释义
单词用法
共释变态；共析转变；共析蜕变 |
同义词
反义词
例句
1.It was found by experiments thatboron increased the growth rate of pearlite, both in hypoeutectoid and eutectoid steels.
硼有加速珠光体成长率的作用，无论在亚共析或共析钢中皆有同样的现象产生。
2.The strength and tenacity of super-eutectoid steel wire have been improved notably by increasing the carbon content of the steel to more than 0.9% and controlling the heat-treatment system.
钢含磷量提高到0．9％以上，控制钢丝的热处理制度，使过共析钢丝强韧性显著提高。
3.Hypereutectoid steels are steels that contain greater than the eutectoid amount of carbon.
过共析钢是含碳量大于共析量的钢。
4.By cr microalloying, the fore eutectoid ferrite eduction is restrained, the distance between rows of pearlite is decreased, then the tensile strength, section shrinkage and drawing property of high...
高碳钢中加入的铬元素抑制先共析铁素体析出，减小珠光体片层间距，可明显提高抗拉强度，提高断面收缩率，改善线材的拉拔性能。
5.A simplified diagram, such as the one in Fig. 2.1, focuses on the eutectoid region and is quite useful in understanding the properties and processing of steel.
如图2.1所示的简化铁碳状态图将焦点集中在共析区，这对理解钢的性能和处理是十分有用的。
6.It is verified that SnNi eutectoid may results as they coexists.
证实了锡和镍共存时能发生共析。
7.Pearlitic transformation in steel is a typical diffusion eutectoid transition.
钢中珠光体转变属典型的扩散型共析转变。
8.Steels shaving less than the eutectoid amount of carbon (less than 0.77%) are known as hypo-eutectoid steels.
含碳量少于共析体(低于0.77%)的钢称为亚共析钢。
9.The microstructure of the alloy revealed a prominent eutectoid phase.
合金的微观结构显示出明显的共晶体相。
10.During cooling, the eutectoid reaction leads to the formation of pearlite in steel.
在冷却过程中，共晶体反应导致钢中珠光体的形成。
11.Understanding the eutectoid reaction is crucial for metallurgists when designing heat treatment processes.
理解共晶体反应对于冶金学家设计热处理工艺至关重要。
12.In the steel industry, the formation of a eutectoid structure can significantly enhance the hardness of the material.
在钢铁工业中，共晶体结构的形成可以显著增强材料的硬度。
13.The eutectoid transformation occurs at a specific temperature and composition in iron-carbon alloys.
在铁碳合金中，共晶体转变发生在特定的温度和成分下。
作文
In the study of materials science, the term eutectoid refers to a specific type of phase transformation that occurs in certain alloys, particularly in steel. This transformation is critical to understanding the properties and behaviors of these materials under various conditions. A eutectoid reaction involves the solidification of a single phase into two distinct solid phases upon cooling. This process can significantly affect the mechanical properties of the material, making it essential for engineers and scientists to comprehend its implications.The classic example of a eutectoid transformation is found in the iron-carbon system, specifically at a carbon content of 0.76%. At this composition, when the material is cooled from austenite, it undergoes a transformation into a mixture of ferrite and cementite. This reaction can be represented as:Austenite (γ) → Ferrite (α) + Cementite (Fe₃C)This eutectoid point is crucial because it determines the microstructure of the steel, which in turn influences its hardness, ductility, and tensile strength. The resulting microstructure consists of alternating layers of ferrite and cementite, which enhances the overall strength of the material while maintaining some degree of ductility.Understanding the eutectoid transformation is vital for metallurgists who aim to tailor the properties of steel for specific applications. By controlling the cooling rates and the composition of the alloy, they can manipulate the formation of the eutectoid structure to achieve desired characteristics. For instance, faster cooling rates can lead to the formation of harder microstructures, while slower cooling allows for more ductile structures.Moreover, the concept of eutectoid transformations is not limited to the iron-carbon system. Similar reactions can be observed in other alloy systems, such as copper-tin and lead-tin alloys. In each case, the eutectoid transformation plays a critical role in defining the material properties and performance in practical applications.In conclusion, the term eutectoid encapsulates a fundamental concept in materials science that describes a specific phase transformation in alloys. Its significance extends beyond theoretical understanding; it has practical implications in the design and application of materials in various engineering fields. By mastering the principles surrounding eutectoid reactions, professionals in metallurgy and materials science can innovate and improve the performance of materials, thereby enhancing the quality and durability of products used in everyday life.
在材料科学的研究中，术语共晶体指的是某些合金中发生的一种特定相变，特别是在钢中。这种转变对于理解这些材料在各种条件下的性质和行为至关重要。共晶体反应涉及在冷却过程中将单相固体化为两种不同的固体相。这一过程可能会显著影响材料的机械性能，因此工程师和科学家必须理解其含义。共晶体转变的经典例子可以在铁碳体系中找到，特别是在0.76%的碳含量下。在这种成分下，当材料从奥氏体冷却时，它会转变为铁素体和水泥石的混合物。该反应可以表示为：奥氏体（γ）→ 铁素体（α） + 水泥石（Fe₃C）这个共晶体点至关重要，因为它决定了钢的微观结构，而这又影响其硬度、延展性和抗拉强度。最终形成的微观结构由铁素体和水泥石交替层组成，这增强了材料的整体强度，同时保持了一定程度的延展性。理解共晶体转变对于冶金学家来说是至关重要的，他们旨在为特定应用量身定制钢的性能。通过控制冷却速率和合金成分，他们可以操纵共晶体结构的形成，以实现所需的特性。例如，较快的冷却速率可以导致更硬的微观结构的形成，而较慢的冷却则允许形成更具延展性的结构。此外，共晶体转变的概念不仅限于铁碳体系。在其他合金体系中，例如铜-锡和铅-锡合金中也可以观察到类似的反应。在每种情况下，共晶体转变在定义材料性能和实际应用中的表现中发挥着关键作用。总之，术语共晶体概括了材料科学中的一个基本概念，描述了合金中一种特定的相变。它的重要性超越了理论理解；在材料设计和应用中具有实际意义。通过掌握围绕共晶体反应的原理，冶金和材料科学专业人士可以创新并改善材料的性能，从而提高日常生活中使用的产品的质量和耐用性。
