ISSN:1003-8620

CN:42-1243/TF

主管:中信泰富特钢集团股份有限公司

主办:大冶特殊钢有限公司

特殊钢 ›› 2011, Vol. 32 ›› Issue (1): 61-63.

• 组织和性能 • 上一篇    下一篇

舵杆用Q345D钢热处理工艺对组织和性能的影响

范秋梅, 付朝波, 张永恒, 王海珍   

  1. 中原特钢股份有限公司,济源459008
  • 收稿日期:2010-10-11 出版日期:2011-02-01 发布日期:2022-09-29
  • 作者简介:范秋梅(1973-),女,工程师,锻冲工艺及模具。

Effect of Heat Treatment Process on Structure and Mechanical Properties of Steel Q345D for Rudder Stock

Fan Qiumei, Fu Chaobo, Zhang Yongheng, Wang Haizhen   

  1. Zhongyuan Special Steel Co Ltd, Jiyuan 459008
  • Received:2010-10-11 Published:2011-02-01 Online:2022-09-29

摘要: 试验研究了Q345D级钢(%:0.18C、0.41Si、1.34Mn、0.05Nb、0.08V、0.024A1)Φ280 mm锻材淬-回火处理和正火处理后的组织和性能。结果表明,经890℃空冷200 s,水冷+570℃回火后的钢抗拉强度Rm≥630MPa,屈服强度Re≥455 MPa, -20℃冲击功AKV 28~40 J;910℃空冷正火后Rm≥575 MPa, Re≥390 MPa, -20℃ AKV42~59 J,均满足舵杆产品对力学性能的要求;淬-回火工件距表面30 mm的组织为回火索氏体+粒状贝氏体,中心组织为珠光体+少量粒状贝氏体,正火处理后工件表面与心部均为珠光体+铁素体组织。

关键词: 舵杆, Q345D钢, 微合金化, 热处理, 组织, 力学性能

Abstract: The structure and properties of Φ280 mm forgings of steel Q345D (%: 0. 18C, 0.41Si, 1. 34Mn, 0. 05Nb, 0. 08V, 0. 024Al) after quenching + tempering treatment and nominalizing treatment have been tested and studied. Results show that with 890 ℃. air cooling for 200 s, then water cooling + 570℃ tempering the steel tensile strength Rm is ≥630 MPa, yield strength Reis ≥455 MPa and impact energy AKV at -20℃ is 28 ~40 J; with normalizing at 910 °C air cooling, the Rm, Re and -20 °C AKV of steel are respectively ≥575 MPa;≥390 MPa and 42 ~59 J, all the mechanical properties meet the requirement for rudder stock product ; the structure at depth 30 mm from surface of quenched-tempered rudder stock piece is tempered sorbite + granular bainite, at center it is pearlite + minor granular bainite, and all the structure at surface and center of normalized rudder stock piece is pearlite + ferrite.