Alloying for impurity tolerance

预计高质量钢材需求的增长可以通过回收钢材来满足。然而，废钢通常被渗透的金属和其他杂质污染，这些杂质通常不能从熔体中完全提取。已知铜、磷和硫的浓度会限制回收钢的适用性，因为它们会导致脆化，可能会加剧热脆性，导致表面开裂，并导致耐腐蚀性、延展性和抗冲击性等性能降低。因此，应仔细考虑合金中的杂质含量，以便回收的钢合金也可用于更具挑战性和高价值的应用。合金化的杂质容忍度可以应用到不同领域的发电厂和本项目的目的是测试的适用性设计的合金在模拟的服务条件下的应用。通过进行磨损、耐腐蚀和疲劳试验，研究这些杂质、热处理方法和涂层对所设计合金的显微组织和机械性能的影响。

The projected rise in the demand of high-quality steel could be met by recycling steel. However, steel scrap is often contaminated with pervasive metals and other impurities which cannot normally be completely extracted from melts. The concentrations of copper, phosphorus and sulphur are known to limit the applicability of recycled steels as they cause embrittlement, may exacerbate hot shortness leading to surface cracking and cause a reduction to properties like corrosion resistance, ductility and impact resistance. For this reason, there should be careful consideration of the levels of impurities in the alloys so that recycled steel alloys too can be used in more challenging and high-value applications. Alloying for impurity tolerance can be applied to different areas of power plants and the aim of this project is to test the suitability of designed alloys for application in simulated service conditions. By carrying out wear, corrosion resistance and fatigue tests, the effects of these impurities, heat treatment methods and coatings on the microstructural and mechanical properties of the designed alloys will be investigated.