Petr Beneš, Tomáš Vrána, David Bricín, Antonín Kříž
{"title":"Possibilities of Restoring the Plasticity of Operationally Degraded Steel EN ISO 14MoV6-3","authors":"Petr Beneš, Tomáš Vrána, David Bricín, Antonín Kříž","doi":"10.21062/mft.2023.081","DOIUrl":null,"url":null,"abstract":"The article deals with the possibility of increasing mechanical and utility properties by means of regenerative heat treatment. Experimental program is focused on the heat treatment of low-alloy heat-resistant steel EN ISO 14MoV6-3. This steel has been used since the 1970s for high-temperature exposed components in practically all coal-fired thermal power plants in the Czech Republic. Thus, steel EN ISO 14MoV6-3 is currently the best studied refractory material whose data, collected from experimental creep behaviour tests, exceeds the computational service time 2.105 hours. In order to remain competitive in the new energy mix, conventional steam power plants are forced to adapt to the requirements of semi-scheduled power generation. However, these plants were not originally designed for such operation and therefore have to adapt to new demands on the timing of the power provided, including requirements to reduce overall plant emissions and to increase the efficiency of power generation. These components are now subjected to substantially increased cyclic stresses due to power changes during half-cap operation. These stresses have a major impact on the material lifetime and therefore on the overall performance and lifetime of the plant.","PeriodicalId":38629,"journal":{"name":"Manufacturing Technology","volume":"48 10","pages":"0"},"PeriodicalIF":1.6000,"publicationDate":"2023-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Manufacturing Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21062/mft.2023.081","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ENGINEERING, MANUFACTURING","Score":null,"Total":0}
引用次数: 0
Abstract
The article deals with the possibility of increasing mechanical and utility properties by means of regenerative heat treatment. Experimental program is focused on the heat treatment of low-alloy heat-resistant steel EN ISO 14MoV6-3. This steel has been used since the 1970s for high-temperature exposed components in practically all coal-fired thermal power plants in the Czech Republic. Thus, steel EN ISO 14MoV6-3 is currently the best studied refractory material whose data, collected from experimental creep behaviour tests, exceeds the computational service time 2.105 hours. In order to remain competitive in the new energy mix, conventional steam power plants are forced to adapt to the requirements of semi-scheduled power generation. However, these plants were not originally designed for such operation and therefore have to adapt to new demands on the timing of the power provided, including requirements to reduce overall plant emissions and to increase the efficiency of power generation. These components are now subjected to substantially increased cyclic stresses due to power changes during half-cap operation. These stresses have a major impact on the material lifetime and therefore on the overall performance and lifetime of the plant.
本文讨论了利用蓄热式热处理提高机械性能和实用性能的可能性。实验方案主要针对低合金耐热材料steel EN ISO 14MoV6-3的热处理。自20世纪70年代以来,这种钢材一直用于捷克共和国几乎所有燃煤火力发电厂的高温暴露部件。因此,钢材EN ISO 14MoV6-3Â是目前研究得最好的耐火材料,其从实验蠕变行为测试中收集的数据超过了计算使用时间2.105小时。为了在新的能源结构中保持竞争力,传统的蒸汽发电厂被迫适应半计划发电的要求。然而,这些电厂最初并不是为这种运行而设计的,因此必须适应对供电时间的新要求,包括减少电厂整体排放和提高发电效率的要求。由于在半封盖操作期间功率的变化,这些部件现在承受了大幅增加的循环应力。这些应力对材料寿命有重大影响,因此对工厂的整体性能和寿命也有重大影响。