初始组织调控对马氏体高强钢和奥氏体与马氏体双相高强钢力学性能影响规律
发布时间：2021-04-23 16:51
高强度钢（HSS）是一种复杂且高度发展的材料,主要通过精细调控化学成分和调控热处理工艺实现复相微观组织。各种强化方式被用来获取不同的韧性、延展性、强度和疲劳性能。通常,强度的提高会导致延展性或可成形性的降低。高强度钢的主要微观结构通常是马氏体以及马氏体和奥氏体的复合组织,奥氏体常用于相变诱导塑性（TRIP）。这些微观结构的演变与发展将直接影响最终的组织,进而影响钢最终的力学性能。加热和奥氏体化过程中的微观组织变化的动力学过程依赖于不同的起始微观组织,这当中会发生许多复杂的微观组织变化,包括再结晶、析出沉淀、奥氏体的生成等等。这些过程都可以明显影响被研究的钢中最终的组织结构和力学性能。因此,有必要研究初始微观组织的效果,以使奥氏体化处理的过程中生成的奥氏体状况达到最优化。而这是获得超高强钢的一个重要步骤。因此,这篇论文的目的在于通过对两种特定的超高强钢的实验揭示初始微观组织和最终力学性能的关系,并给出关于选择怎样的初始微观组织以获得需要的力学性能的建议。本文也将通过实验结果解释初始微观组织是怎样影响最终的微观组织和力学性能的。本文使用了两种典型的超高强钢,分别是马氏体钢和奥氏体加马氏体的...
【文章来源】：上海交通大学上海市 211工程院校 985工程院校 教育部直属院校
【文章页数】：89 页
【学位级别】：硕士
【文章目录】：
摘要
ABSTRACT
Chapter 1 INTRODUCTION
1.1 Motivation
1.2 Objective of the current research
Chapter 2 THEORETICAL BACKGROUND
2.1 Review of 22MnB5 hot stamping steel
2.2 Austenite formation
2.3 Initial Microstructure
2.4 Strengthening mechanism for martensitic steels
2.5 Nb/V effects
2.6 Effects of retained austenite on mechanical properties
2.7 Effect of warm rolling reduction on the microstructure
Chapter 3 EXPERIMENTAL PROCEDURE
3.1 Material design and processing for 22MnB5 steel
3.2 Material design and processing for lONi steel
3.3 Methodology of characterization
Chapter 4 EFFECTS OF INITIAL MICROSTRUCTURES ON THE MECHANICAL PROPERTIES OF THE 22MnB5MARTENSITIC STEELS
4.1 Mechanical properties of 22MnB5+NbV steels water quenched after full austenitization at 900 ℃ starting from different initialconditions
4.2 Effects of NbV alloying elements on the properties of 22MnB5 steels
4.3 Mechanical properties of 22MnB5+NbV steels hot pressed after full austenitization
4.4 Effects of initial conditions on the final mechanical properties of 22 MnB5+0.8Si+NbV steel
Chapter 5 EFFECTS OF INITIAL MICROSTRUCTURES ON THE MECHANICAL PROPERITES OF DUPLEX 10Ni STEEL
5.1 Mechanical properties of 10Ni duplex steels produced from different initial microstructures
5.2 Deformation mechanism and fracture characteristics of 10Ni duplex steel
Chapter 6 CONCLUSION
ACKNOWLEDGMENT
BIBLIOGRAPHY
本文编号：3155686
【文章来源】：上海交通大学上海市 211工程院校 985工程院校 教育部直属院校
【文章页数】：89 页
【学位级别】：硕士
【文章目录】：
摘要
ABSTRACT
Chapter 1 INTRODUCTION
1.1 Motivation
1.2 Objective of the current research
Chapter 2 THEORETICAL BACKGROUND
2.1 Review of 22MnB5 hot stamping steel
2.2 Austenite formation
2.3 Initial Microstructure
2.4 Strengthening mechanism for martensitic steels
2.5 Nb/V effects
2.6 Effects of retained austenite on mechanical properties
2.7 Effect of warm rolling reduction on the microstructure
Chapter 3 EXPERIMENTAL PROCEDURE
3.1 Material design and processing for 22MnB5 steel
3.2 Material design and processing for lONi steel
3.3 Methodology of characterization
Chapter 4 EFFECTS OF INITIAL MICROSTRUCTURES ON THE MECHANICAL PROPERTIES OF THE 22MnB5MARTENSITIC STEELS
4.1 Mechanical properties of 22MnB5+NbV steels water quenched after full austenitization at 900 ℃ starting from different initialconditions
4.2 Effects of NbV alloying elements on the properties of 22MnB5 steels
4.3 Mechanical properties of 22MnB5+NbV steels hot pressed after full austenitization
4.4 Effects of initial conditions on the final mechanical properties of 22 MnB5+0.8Si+NbV steel
Chapter 5 EFFECTS OF INITIAL MICROSTRUCTURES ON THE MECHANICAL PROPERITES OF DUPLEX 10Ni STEEL
5.1 Mechanical properties of 10Ni duplex steels produced from different initial microstructures
5.2 Deformation mechanism and fracture characteristics of 10Ni duplex steel
Chapter 6 CONCLUSION
ACKNOWLEDGMENT
BIBLIOGRAPHY
本文编号：3155686
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