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T52L钢己在国内主要汽车厂用来冲制车架纵、横梁和车箱纵、横梁等汽车构件。这些构件在汽车上长期经受交变负荷,因此其抗疲劳损坏的能力,是一项重要的性能指标。我们对这种钢的疲劳极限、疲劳缺口敏感性、裂纹扩展速度、断口形貌、平均破断强度(σ_f)、J积分(J_(0.2))、断裂韧性(K_(1C))等进行了初步探讨,并与日本的20A1、重钢的16MnL等钢种进行了比较,证明此钢有较好的性能。
T52L steel has been used in the country’s major auto factory Chong rack vertical and horizontal beams and car longitudinal, beams and other automotive components. These components are subject to alternating loads in the car for a long period of time, so their ability to withstand fatigue damage is an important performance indicator. We initially carried out the fatigue limit, the fatigue gap sensitivity, the crack growth rate, the fracture morphology, the average fracture strength (σ_f), the J integral (J_ (0.2)) and the fracture toughness And compared with Japan’s 20A1, heavy steel 16MnL and other types of steel to prove that the steel has better performance.