Factors Affecting the Mechanical Properties of Ultra-high-strength Bainitic Steel Containing W and 0.33 mass% C

作     者：Shi-meng ZHOU Xing-wang CHENG You-jing ZHANG Meng WANG Wen JIANG Hong-nian CAI 

作者机构：School of Materials Science and EngineeringBeijing Institute of Technology National Key Laboratory of Science and Technology on Materials under Shock and ImpactBeijing Institute of Technology 

出 版 物：《Journal of Iron and Steel Research International》 (J. Iron Steel Res. Int.)

年 卷 期：2016年第23卷第3期

页      面：289-296页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

主　　题：upper bainite lower bainite bainitic ferrite retained austenite untempered martensite mechanical property 

摘      要：A novel ultra-high-strength bainitic steel was *** analysis of its mechanical properties by quasistatic testing showed that upper bainitic steel exhibited an ultimate tensile strength of 2 260 MPa（engineering stress）and an ultimate compressive strength of more than 2 700MPa（true stress）.The ultra-high strength of upper bainitic steel was mainly attributed to untempered martensite and upper bainite with a feather-like ***,lower bainitic steel demonstrated an ultimate tensile strength of 1 922 MPa（engineering stress）and an ultimate compressive strength of 2 500MPa（true stress）.The ultra-high strength of lower bainitic steel was primarily due to untempered martensite and lower bainite with an acicular *** untempered martensite in the two kinds of bainitic steels was produced in different *** dynamic test results showed that the ultimate compressive strengths of the two bainitic steels were maintained at 1 600MPa（true stress）under high strain rates（1 100and2 200s-1）at 600℃,because of the added tungsten,confirming the satisfactory hot hardness property of the ***,lower bainitic steel showed better comprehensive mechanical properties than upper bainitic steel.