文章信息/Info

Title:

Research Progress on Second Phase Strengthening and Toughening of Advanced Steels

作者:

王舟; 李亦莊; 何斌斌; 黃明欣

(香港大學機械工程系，香港 999077)

(香港大學深圳研究院，廣東 深圳 518057）

Author(s):

WANG Zhou; LI Yizhuang; HE Binbin; HUANG Mingxin

(Department of Mechanical Engineering, University of Hong Kong, Hong Kong 999077, China)

(Shenzhen Institute of Research and Innovation, University of Hong Kong, Shenzhen 518000, China)

關鍵詞:

第二相顆粒; 強韌化; 汽車輕量化用鋼; 馬氏體時效鋼; 核反應堆用鋼; 高模量鋼

Keywords:

second phase particles;  strengthening and toughening;  automotive steels for weight lightening;  ultra-high strength maraging steels;  fission and fusion reactor steels;  high modulus steels

DOI:

10.7502/j.issn.1674-3962.2019.03.04

文獻標志碼:

A

摘要:

第二相顆粒是鋼材強韌化的重要方法，可以同時兼顧鋼材的強度、韌性以及其他服役性能。隨著近年來對鋼材強度要求的提高，研究人員開發出了一大批新型鋼鐵材料，第二相顆粒強韌化在這些新型鋼材中亦發揮了重要作用。但與此同時，在這些新型鋼鐵材料中，第二相顆粒強韌化也面臨著諸多挑戰與機遇：納米尺度顆粒的表征與調控、第二相顆粒與多相微觀組織的相互作用以及鋼材服役性能的優化等等。通過汽車輕量化用鋼、超高強度馬氏體時效鋼、核反應堆用鋼、高模量鋼等不同鋼材，總結了第二相顆粒對新型鋼鐵材料的強度、韌性、焊接性、成形性、抗氫致延遲斷裂、蠕變、抗輻射損傷等性能的影響，并結合這些新型鋼鐵材料獨特的微觀組織、制備工藝、服役環境等特點，分析了其第二相顆粒強韌化的機理以及尚待解決的問題，旨在為鋼中第二相顆粒強韌化領域的進一步研究與發展提供參考。

Abstract:

Second phase strengthening plays an important role in the strengthening and toughening of steels, which could improve simultaneously strength, toughness as well as other in-use properties. Recently, with the increasing demands for higher strength steels, second phase strengthening has been utilized in many newly-developed steels to improve strength and toughness. Despite the promising properties, second phase strengthening should overcome many difficulties in those advanced steels before practical application. Among these challenges are nanoscale characterization and control, interaction between multiphase structure and second phase particles, and optimization of in-use properties. This review focuses on the second phase strengthening and their influences on the strength, toughness, weldability, formability, delayed fracture resistance, creep strength and irradiation resistance of advanced steels. In particular, automotive steels for weight lightening, ultra-high strength maraging steels, fission and fusion reactor steels and high modulus steels are discussed here. Based on the special microstructures, manufacture techniques and applications of the different advanced steels, the strengthening and toughening mechanisms are analyzed, and the research gaps are proposed. The aim of this review is to provide a reference for further research and development of advanced steels with second phase strengthening.