Optimization of strength, ductility and wear resistance of low-carbon grade A shipbuilding steel by post-ECAP annealing

IF 0.9 4区材料科学 Q3 METALLURGY & METALLURGICAL ENGINEERING Metallurgical Research & Technology Pub Date : 2021-01-01 DOI:10.1051/METAL/2021021

M. Demirtaş, D. M. Sekban

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引用次数: 2

Abstract

Effect of equal channel angular pressing (ECAP) and subsequent annealing on the microstructure, mechanical properties and tribological behavior of grade A shipbuilding steel was investigated. Coarse-grained microstructure of initial sample is eliminated during the ECAP at 375 °C and more refined microstructure is achieved. Post-ECAP annealing at 575 °C results in some grain growth, and also the cementite lamellae in the pearlite colonies is broken and got spheroidised during the annealing treatment. ECAP increases strength and hardness of steel significantly while it decreases the ductility. On the other hand, post-ECAP annealing treatment brings about an increase in ductility and diminishes the hardness, as expected. Strain hardening capacity, ductility, hardness and oxidation rate were found to be the main factors affecting wear resistance of the grade A steel. It was found that high hardness and strength, good wear resistance with sufficiently high ductility can be achieved in the grade A steel by applying ECAP + annealing processes.

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低碳A级造船用钢ecap后退火强度、延展性和耐磨性优化

研究了等径角挤压(ECAP)及其退火工艺对A级造船钢组织、力学性能和摩擦学性能的影响。在375℃的ECAP过程中，消除了初始样品的粗晶组织，获得了更精细的组织。575℃后ecap退火导致晶粒长大，珠光体菌落中的渗碳体片层在退火过程中断裂并球化。ECAP能显著提高钢的强度和硬度，同时降低钢的延展性。另一方面，经ecap后退火处理，如预期的那样，提高了塑性，降低了硬度。结果表明，影响A级钢耐磨性的主要因素是应变硬化能力、塑性、硬度和氧化率。结果表明，采用ECAP +退火工艺可以获得高的硬度和强度，良好的耐磨性和足够高的塑性。

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来源期刊

Metallurgical Research & Technology METALLURGY & METALLURGICAL ENGINEERING-

CiteScore

1.70

自引率

9.10%

发文量

审稿时长

4.4 months

期刊介绍： Metallurgical Research and Technology (MRT) is a peer-reviewed bi-monthly journal publishing original high-quality research papers in areas ranging from process metallurgy to metal product properties and applications of ferrous and non-ferrous metals and alloys, including light-metals. It covers also the materials involved in the metal processing as ores, refractories and slags. The journal is listed in the citation index Web of Science and has an Impact Factor. It is highly concerned by the technological innovation as a support of the metallurgical industry at a time when it has to tackle severe challenges like energy, raw materials, sustainability, environment... Strengthening and enhancing the dialogue between science and industry is at the heart of the scope of MRT. This is why it welcomes manuscripts focusing on industrial practice, as well as basic metallurgical knowledge or review articles.