Study on quenching process of 960 MPa quenched and tempered steel plates for construction machinery

作者：Kang Jian^*; Lu Feng; Wang Zhao Dong; Wang Guo Dong

来源：Journal of Northeastern University, 2011, 32(1): 52-55.

• Austenite grain size
• Charpy impact energy
• Construction machinery
• High-strength
• Holding time
• Microstructure and mechanical properties
• National standard
• Overall properties
• Percentage elongation
• Quenched and tempered steel
• Quenching and tempering
• Quenching process
• Quenching temperatures
• Yield strength

To develop the Q960 high-strength quenched and tempered steel plates, the effects of quenching treating regime on the microstructure and mechanical properties of plate specimens were investigated. The results showed that the dissolution and distribution of alloying elements and the original austenite grain size are determined by quenching temperature and holding time and, finally, the overall mechanical properties are obviously affected by the quenching process parameters, and the excellent overall properties of specimens can be obtained when the quenching temperature is 900°C with holding time 15~25 min, i.e., the yield strength is 1110 MPa, tensile strength 1140 MPa and percentage elongation 14% with the Charpy impact energy 130 J at -40°C. All these indexes come up to the national standard GB/T16270-2009.

• 出版日期2011
• 单位东北大学