hypoeutectoid

简明释义

英[ˌhaɪpoʊjuːˈtɛkˌtɔɪd]美[ˌhaɪpoʊjuːˈtɛkˌtɔɪd]

adj. 亚共析的

英英释义

单词用法

同义词

反义词

例句

1.The hardening gradient and the character of abrasion in hardening layer of hypoeutectoid steel with two kinds of matrixes that was treated by laser beam have been studied.

研究了两种基体的亚共析钢经激光处理后，其硬化层的硬度梯度及其磨损特性。

2.The hardening gradient and the character of abrasion in hardening layer of hypoeutectoid steel with two kinds of matrixes that was treated by laser beam have been studied.

研究了两种基体的亚共析钢经激光处理后，其硬化层的硬度梯度及其磨损特性。

3.The results show that, in hypoeutectoid steels, deformation at medium temperature may fine the structure and improve the distribution of ferrite and pearlite greatly;

结果表明，对于亚共析钢，在中温区变形、保温后可使先共析铁素体和珠光体组织大大细化，显著改善钢中铁素体和珠光体的分布状况；

4.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。

5.Both steel iron and cast iron have the structures of eutectoid, hypoeutectoid and hypereutectoid.

钢和铸铁都有共析、亚共析和过共析这三种组织。

6.The steel used in this construction is classified as hypoeutectoid because it contains less than 0.76% carbon.

这项工程中使用的钢材被归类为低共晶，因为它含有少于0.76%的碳。

7.In metallurgy, hypoeutectoid alloys are known for their strength and ductility.

在冶金学中，低共晶合金以其强度和韧性而闻名。

8.The hypoeutectoid composition of the alloy makes it suitable for high-temperature applications.

该合金的低共晶成分使其适用于高温应用。

9.When heated, a hypoeutectoid steel will transform into austenite before cooling.

加热时，低共晶钢会先转变为奥氏体，然后再冷却。

10.The presence of ferrite in a hypoeutectoid steel contributes to its toughness.

在低共晶钢中，铁素体的存在有助于其韧性。

作文

In the field of materials science, understanding the various classifications of alloys is crucial for engineers and researchers alike. One such classification is that of hypoeutectoid alloys, which play a significant role in determining the properties and behaviors of steel. To grasp the concept of hypoeutectoid, it is essential to first comprehend the phase diagram of iron-carbon alloys, particularly the eutectoid point. The eutectoid point occurs at a carbon content of approximately 0.76%, where austenite transforms into pearlite upon cooling. Alloys with carbon content less than this critical value are classified as hypoeutectoid alloys. The significance of hypoeutectoid alloys lies in their microstructural characteristics, which influence mechanical properties such as hardness, ductility, and tensile strength. These alloys typically contain between 0.02% and 0.76% carbon. As the carbon content increases, the microstructure transitions from ferrite to pearlite, with the latter being a mixture of ferrite and cementite (iron carbide). The presence of ferrite in hypoeutectoid alloys contributes to improved ductility, making them suitable for applications requiring deformation without fracture. When manufacturing hypoeutectoid steels, it is essential to control the cooling rate during the solidification process. A slow cooling rate allows for the formation of larger pearlite colonies, resulting in enhanced toughness. Conversely, rapid cooling can lead to the formation of martensite, which is much harder but also more brittle. This balance between cooling rates and alloy composition is critical in achieving the desired mechanical properties for specific applications, such as automotive components or structural beams. Furthermore, the heat treatment processes applied to hypoeutectoid alloys can significantly alter their microstructure and performance. For instance, annealing treatments can relieve internal stresses and improve ductility, while quenching followed by tempering can enhance hardness while maintaining some level of toughness. Understanding these processes allows engineers to tailor the properties of hypoeutectoid steels for various engineering applications. In conclusion, hypoeutectoid alloys are an essential category of iron-carbon alloys that possess unique properties due to their lower carbon content. Their microstructural characteristics, influenced by both composition and processing conditions, make them suitable for a wide range of applications in engineering. By mastering the principles surrounding hypoeutectoid alloys, professionals in the field of materials science can design and utilize these materials effectively, thereby contributing to advancements in technology and infrastructure. The study of hypoeutectoid alloys exemplifies the intricate relationship between material composition, processing, and performance, highlighting the importance of this knowledge in the development of modern engineering solutions.

在材料科学领域，理解合金的各种分类对工程师和研究人员都至关重要。其中一种分类是hypoeutectoid合金，它在决定钢的性能和行为方面发挥着重要作用。要理解hypoeutectoid的概念，首先必须理解铁碳合金的相图，特别是共晶点。共晶点发生在约0.76%的碳含量处，奥氏体在冷却时转变为珠光体。碳含量低于此临界值的合金被归类为hypoeutectoid合金。 hypoeutectoid合金的意义在于其微观结构特征，这些特征影响机械性能，如硬度、延展性和抗拉强度。这些合金通常含有0.02%到0.76%的碳。随着碳含量的增加，微观结构从铁素体过渡到珠光体，后者是铁素体和水泥石（碳化铁）的混合物。hypoeutectoid合金中铁素体的存在有助于提高延展性，使其适用于需要在不破裂的情况下变形的应用。 在制造hypoeutectoid钢时，控制固化过程中的冷却速率至关重要。缓慢的冷却速率允许形成较大的珠光体群，从而增强韧性。相反，快速冷却可能导致马氏体的形成，马氏体的硬度更高，但也更脆。这种冷却速率与合金成分之间的平衡对于实现特定应用所需的机械性能至关重要，例如汽车零部件或结构梁。 此外，施加于hypoeutectoid合金的热处理过程可以显著改变其微观结构和性能。例如，退火处理可以释放内部应力并改善延展性，而淬火后回火则可以提高硬度，同时保持一定程度的韧性。理解这些过程使工程师能够根据各种工程应用量身定制hypoeutectoid钢的性能。 总之，hypoeutectoid合金是一类重要的铁碳合金，由于其较低的碳含量而具有独特的性能。其微观结构特征受成分和加工条件的影响，使其适用于广泛的工程应用。通过掌握有关hypoeutectoid合金的原理，材料科学领域的专业人士可以有效地设计和利用这些材料，从而推动技术和基础设施的进步。对hypoeutectoid合金的研究体现了材料成分、加工和性能之间的复杂关系，突显了这一知识在现代工程解决方案发展中的重要性。