Refurbishment of torpedo ladle and locomotion axles through Laser Applied Surface Engineering (Re-LASE)

在钢铁生产和高速移动车桥中，鱼雷钢包车轴的使用条件非常苛刻，导致短时间内出现高水平的磨料磨损和疲劳，从而导致高废品率。在磨损的钢包和机车车轴上应用合适的激光工程涂层(LEC)将大大节省更换成本，并消除制造新部件的二氧化碳负担。LEC技术是一项最新的发展，成功地应用于各种应用中，其中耐磨性是最重要的考虑因素，而疲劳性能并不重要。冶金粉末的开发不足导致疲劳性能增强，这限制了LEC在更广泛的应用中的发展，例如前述车轴，出于安全原因，循环应力下的行为是一个关键问题。因此，在该项目中，将执行一项全面的粉末和LEC开发计划，以生产优化的新涂层，以综合高疲劳、高磨损和高附着力性能，并将通过破坏性和非破坏性评估进行验证。

The highly demanding in-service conditions of torpedo ladle axles in steel production and high speed locomotion axles result in high levels of abrasive wear and fatigue on short timescales, thus contributing to high scrappage rates. Applying a suitable Laser Engineered Coating (LEC) on to worn ladle and locomotive axles will generate large savings on replacement costs, as well as eliminating the CO2 burden of manufacturing new components. LEC technology is a recent development, successfully implemented in a variety of applications where resistance to wear is the foremost consideration and fatigue performance is not seen as important. The lack of development of metallurgical powders which lead to enhanced fatigue performance has limited the growth of LEC into much broader applications, such as the aforementioned axles, where behaviour under cyclic stress is a key concern for safety reasons. Therefore in this project a comprehensive programme of powder and LEC development will be performed to produce new coatings optimised for combined high fatigue, wear and adhesion performance, which will be validated through both destructive and non-destructive evaluation.