Development and electrochemical characterization of stainless, TIG welded precision tubes made of CrMnNiMoN austenitic hot-rolled steel strip (T05#)

该转移项目的目的是在实验室规模上构思、加工和研究具有TRIP/TWIP性能的低成本、可焊接的奥氏体不锈钢CrMnNiMoN钢，以及其工业生产和在TIG焊接精密管材制造中的验证。这种钢的特点是镍含量降低，锰和氮浓度升高，以降低合金成本。TRIP/TWIP效应导致奥氏体钢在管材生产过程中具有较高的变形和硬化能力，并在更精简的产品设计意义上打开了节省材料的可能性。这项工作包括深入研究热轧带钢和TIG焊接材料的点蚀和再钝化行为，以及对应力腐蚀开裂和氢致开裂的敏感性。

The aim of the transfer project is the conception, processing and research of cost-effective, weldable, austenitic, stainless CrMnNiMoN steel with TRIP/TWIP properties on a laboratory scale, as well as its industrial production and verification in the manufacture of TIG-welded precision tubes. The steel is characterised by a reduced nickel content and elevated manganese and nitrogen concentrations to decrease the alloy costs. TRIP/TWIP effects lead to a high deformation and hardening capacity of the austenitic steel during tube production and open up the possibility of material savings in the sense of a leaner product design. The work includes intensive investigations of pitting and repassivation behaviour as well as the sensitivity against to stress corrosion cracking and hydrogen induced cracking on the hot rolled strip and the TIG welded material.