Combined surface treatment for generation of multi functional surface by means of electron beam cladding (EBC) and thermochemical treatment (TCT) on an austenitic corrosion resistant steel (KomET)

通过电子束熔覆 (EBC) 和热化学处理 (TCT) 对奥氏体耐腐蚀钢 (KomET) 进行组合表面处理，生成多功能表面

基本信息

批准号：
319182474
负责人：
Professor Dr.-Ing. Rolf Zenker
金额：
--
依托单位：
Institut für Werkstofftechnik
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2016
资助国家：
德国
起止时间：
2015-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/319182474?language=en
关键词：
Combined surface treatment generation multi

项目摘要

Corrosion resistant steels are distinguished by an excellent corrosion resistance, but are afflicted with considerably limitations related to wear resistance. Numerous treatments to eliminate these disadvantages led only partially to positive results. The submitted project is based on a combined surface treatment with an electron beam cladding (EBC) as first process step and a subsequent plasma nitrocarburizing (PNC). Own preliminary investigations showed that in principle it is possibly to raise hardness and wear resistance and to maintain the corrosion resistance at one. Aim of the project is to generate layer/matrix compounds useable under increased loading conditions in corrosive media. Using the example of steel X6CrNiMoTi17-12-2 initially there are to indentify optimum EB parameters to produce one- but especially multi-pass Co-based EBC coatings, free of cracks and pores, as well as a faultless metallurgical connection. Hardness and wear resistance should be improved considerably. The corrosion resistance at least should be nearly the same as that of base material. Basis for these investigations is one selected Co-base additive, which have to be investigated concerning the effect of Cr and Fe content on EBA coating formation (microstructure) and the degree of mix up , i.e. the element content of the prior deposited cladding layer, especially in the multi-pass EBA coating. In connection with the combination EBC+PNC, the metallurgical compatibility and the effect of coating configuration (microstructure) on the mechanisms of PNC layer formation in relation to a compact material as well as the supporting effect of the EBA coating for the subsequently generated thin PNC layer (expanded austenite) should be methodically investigated. The occurring processes during EBA (interaction EB/material) respectively PNC (N/C layer formation on Co-base EBA coating) will be fundamentally analyzed and interpreted. On the basis of selected reference specimens the load characteristic of the layer/matrix compounds, i. e. which wear and corrosion mechanisms occur in case of different application specific load conditions will be basically investigated. For that purpose should be carried out wear tests (Tribometer) on different load levels (normal force 5-500 N) and/or at different temperatures (24-300 °C) as well as corrosion tests in different acid media (potentiodynamic measurements in 0.05M acid sulfur, and long term tests in 30% citric acid or 20% acid sulfur). In result of the project should be obtained new basic knowledge about the project relevant combined surface treatment and created generalized conclusions for the process design.

耐腐蚀的钢具有出色的耐腐蚀性，但遭受了与耐磨性相关的限制。消除这些灾难的许多治疗方法仅部分带来了积极的结果。提交的项目基于与电子束覆层（EBC）作为第一个过程步骤和随后的等离子体氮气（PNC）的联合表面处理。自己的初步研究表明，原则上可以提高硬度和耐磨性并保持耐腐蚀性。该项目的目的是生成在腐蚀性介质增加的加载条件下可用的层/矩阵化合物。最初，使用钢X6CRNIMOTI17-12-2的示例来缩进最佳EB参数，以产生一种 - 但尤其是基于多通的CO的EBC涂层，没有裂缝和毛孔，以及无故障的冶金连接。硬度和耐磨性应仔细提高。耐腐蚀性至少应与基本材料的耐腐蚀性几乎相同。这些投资的基础是一种选定的共同基础添加剂，必须研究有关CR和Fe含量对EBA涂层形成（微结构）的影响（微结构）和混合程度，即先前沉积的覆层层的元素含量，尤其是在多通 - 乘积EBA涂层中的元素。与组合EBC+PNC相关，冶金兼容性以及涂层构型（微结构）对PNC层形成机制的影响，与紧凑型材料以及EBA涂层对随后生成的薄PNC层（扩展的奥斯汀）的支撑作用。 EBA（相互作用EB/材料）期间的PNC（共同基本EBA涂层上的N/C层形成）的发生过程将进行根本分析和解释。基于选定的参考规格，基本上研究了层/基质化合物的负载特征，即在不同的应用特定负载条件下发生哪种磨损和腐蚀机制。为此，应在不同的载荷水平（正常力5-500 N）和/或不同温度（24-300°C）上进行磨损测试（摩擦计），以及不同酸性培养基（0.055m酸性硫酸硫硫的预电动力学测量结果，以及30％柠檬酸或20％柠檬酸硫酸硫的长期测试）的腐蚀测试。由于该项目应获得有关项目相关的组合表面处理的新基本知识，并为过程设计创建了广义结论。