微观结构通过核化微粒状状铁素的精细化,通过含有Ti的核心外结构颗粒刺激低碳钢中的核状铁素
Zhu Yan1, Chao Wang1, Hua Duan1
1The State Key Laboratory of Rolling and Automation (RAL), Northeastern University, Shenyang 110819, China.
Materials (Basel, Switzerland)
|September 28, 2024
概括
脱氧化钢具有显著增强的冲击性,这是由于状铁 (AF) 的形成. 核心外Ti2O3/TiO颗粒和低格子无注册促进AF核化,改善钢材性能.
科学领域:
- 材料科学 材料科学 材料科学
- 金工业是金工业的一个方面.
- 物理化学 物理化学
背景情况:
- 状铁 (AF) 的形成对于提高钢的性至关重要.
- 使用 (Mn) 和 (Al) 的传统脱氧方法在冲击性方面取得了有限的改善.
- 了解核化机制是开发先进高强度钢的关键.
研究的目的:
- 为了研究热Ti脱氧化钢中无铁酸盐 (AF) 的微观结构,机械性能和核化机制.
- 阐明特定脱氧产品在促进AF形成中的作用.
- 为了将微观结构与增强的冲击性相关联.
主要方法:
- 热Ti脱氧化钢的实验研究.
- 微结构分析以识别AF和第二阶段粒子.
- 机械性能测试,特别是在低温下冲击性.
- 核化机制的分析,包括格子无注册和定向关系.
主要成果:
- 与Mn (9 J) 和Al (18 J) 脱氧化钢相比,Ti脱氧化钢的冲击性显著增加 (在-20 °C下为144 J).
- 互锁的状铁被确定为Ti脱氧化钢中占主导地位的微结构.
- 核心外结构的Ti2O3/TiO粒子被发现是AF的有效核化剂.
- 确定了TiO和AF之间的低晶格失序,以及与MnS相邻的Mn-depleted zone (MDZ) 的形成,是促进AF核化的关键因素.
结论:
- 脱氧化有效地促进了无环铁的形成,从而使钢具有优越的冲击性.
- 核心外Ti2O3 / TiO粒子由于有利的晶体学匹配,作为AF的关键核化地点.
- Ti2O3 / TiO颗粒,MnS和由此产生的Mn-depleted区域之间的相互作用为增强AF核和提高钢铁性能提供了一个全面的机制.
相关概念视频
01:26Steel Manufacturing
379
Steel manufacturing is a multi-stage process that begins by smelting iron ore into cast iron in a blast furnace. This initial stage involves layering iron ore with coke, a type of fuel, and crushed limestone within the furnace. The coke is ignited with a high volume of air, leading to the creation of carbon monoxide, which acts to reduce the iron ore to pure iron.
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
During this smelting process, limestone plays a crucial role by forming slag. Slag captures impurities within the molten iron, such...
379
01:18Mechanical Characteristics of Steel
404
The mechanical characteristics of steel are assessed through various tests that evaluate its strength, toughness, and flexibility. These tests include tension, torsion, impact, bending, and hardness assessments, each providing crucial information about steel's suitability for specific applications.
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
The tension test is fundamental for determining tensile strength. In this test, a steel specimen is stretched using a gripping device until it breaks. The data collected during this test are used...
404
01:24Structural Steel Products
149
Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
149