论文部分内容阅读
海军用材料损耗极大,因而力图通过改进材料、工艺、焊接方法和技术装备,以相应地提高综合性能。大多数用于海军结构件的高强钢,特别是HY-80和HY-100都经调质处理达到一定的强度水平,但这几类钢焊接时需要采用预热处理。严格遵照规定操作是避免氢敏钢开裂的基本保证,并获得可需要的机械性能。因而成本显著提高。为了降低成本,寻求代用钢材,选用了A7-10-A海洋用钢。该牌号钢材具有551.7MPa屈服强度和必要的韧性。其高强度主要由沉淀硬化产生,而其低的碳含量(最大0.07)又使它对氢诱发裂纹不敏感。对厚度直至32mm的各种板材进行了研究,确认了其在各类结构件中应用的合理法。 A-7-10钢的焊接性能极好。所有经烘干预热的焊接板材均未发生基体——金属相
Navy materials, loss of great, and therefore sought to improve materials, processes, welding methods and technical equipment, in order to improve the overall performance. Most of the high-strength steels used for naval structural parts, especially HY-80 and HY-100, have been tempered to a certain strength level, but these types of steels need to be preheated during welding. Strict compliance with the provisions of the operation is to avoid hydrogen-based steel cracking the basic guarantee, and obtain the necessary mechanical properties. As a result, costs have increased significantly. In order to reduce costs, to find alternative steel, the selection of A7-10-A marine steel. The grade steel has 551.7MPa yield strength and the necessary toughness. Its high strength is mainly caused by precipitation hardening, while its low carbon content (up to 0.07) makes it insensitive to hydrogen-induced cracking. A variety of plates up to 32 mm in thickness have been studied and validated for their use in various structural components. A-7-10 steel welding performance is excellent. All of the preheated welding plates did not undergo a matrix-metal phase