文章信息/Info

Title:

Study on Impact Toughness and Plane Strain Fracture Toughness of Four Kinds of High�睸trength Steels

作者:

馮九勝

中航工業陜西千山航空電子有限責任公司，陜西 西安 710065

Author(s):

FENG Jiusheng

Shaanxi Qianshan Avionics Co., Ltd., Xi’an 710065, China

關鍵詞:

高強鋼; 沖擊韌性; 平面斷裂韌性; 選材

Keywords:

high strength steel;  impact toughness;  plane strain fracture toughness;  materials selection

DOI:

10.7502/j.issn.1674-3962.2018.04.10

文獻標志碼:

A

摘要:

A100、G50、G53、G54是4種常用的具有高強度、高韌性、良好抗沖擊性等優異力學性能的高強鋼，在工業制造領域得到了廣泛的應用。對這4種高強鋼分別進行了沖擊韌性試驗和平面應變斷裂韌性試驗，對其沖擊功、平面斷裂韌度和斷口形貌進行了研究分析和比較。研究結果發現，4種高強鋼承受沖擊功和平面斷裂韌度大小的順序均為：A100>G50>G54>G53，表明A100高強鋼具有優異的抗沖擊性能和平面斷裂韌性，而G53和G54雖然具有較高的靜力學強度，但其沖擊韌性和平面斷裂韌性相對較低。研究結果為新型高強鋼的設計、抗沖擊結構的選材和優化設計提供了數據參考。

Abstract:

A100, G50, G53, G54 are four kinds of high�瞫trength steel with high strength, high toughness, good impact resistance and other excellent mechanical properties, which have been widely used in the field of industrial manufacturing. In this paper, the impact toughness and plane strain fracture toughness of four kinds of high�瞫trength steels (A100, G50, G53, G54) were tested, impact energy, fracture toughness and fracture image were also obtained and compared. Results showed that the order of both impact energy and fracture toughness was A100>G50>G54>G53, which indicated that A100 high�瞫trength steel has excellent impact resistance and plane fracture toughness, while G53 and G54 have relatively low impact toughness and plane fracture toughness despite their high static strength. The result could provide a reference for designing and optiming anti�瞚mpact structures.