5th International High Manganese Steel Conference - HMNS 2022

This paper presents the results of recent investigations on the influence of the hot press forming (HPF) temperature cycles for a novel medium manganese, high ductility 1000MPa zinc coated steel (HQ1000-GI), with specific emphasis on the risks of liquid metal embrittlement (LME) induced cracking during resistance spot welding (RSW).

In this study, a zinc coated 7Mn steel was hot formed...

Hot rolled medium Mn steel was arc welded by employing a E-71T-GS flux cored filler in a butt joint with 3 mm in thickness. The initial microstructure of the sheet was composed of martensite and very little amount of austenite, the ultimate tensile strength in this condition was close to 1600 MPa with a negligible elongation. A post-heat treatment of intercritical annealing was proposed in...

The microstructure and tensile properties of an arc welding joint of a Medium Mn steel, with nominal composition of Fe-0.12C-1.7Al-1.8Si-10.4Mn-0.14V (wt%), before and after intercritical annealing (IA) treatment were analyzed. An E-71T-GS flux cored filler was used to weld with a butt joint the medium Mn sheets of 3mm thickness. The initial microstructure of the sheet was composed of retained...

Here, we suggest a new thermomechanical process, which is referred to as resetting process, to recover the reduced ductility in cold-worked medium-Mn steel. The objective of the present study is motivated by the fact that one automotive component sometimes requires the two different parts for compensation of opposing attributes. For example, the upper part of center pillar needs a high...

Product quality, throughput, as well as energy and resource efficiency are the most important requirements in steel production. In order to meet these requirements, typically more than 15 parameters such as temperature, energy consumption and composition of the steel are monitored and the process is adjusted accordingly. The slag analysis results however, are due to extensive homogenization...

This paper will present the effects of substrate chemistry and process atmosphere pO2 on the selective oxidation and reactive wetting of a series of prototype 0.2C-6Mn-xSi-yAl-zCr third-generation advanced high strength steels (3G AHSS). The substrates were first austenitized and quenched to room temperature, flash pickled, intercritically annealed and galvanized, where all annealing...

To increase the yield strength of HMnS and afterwards regain the capability for residual deformation we developed a novel thermomechanical treatment to manufacture a high manganese TRIP steel with excellent mechanical performance by combining the deformation-mechanisms SLIP, TWIP and subsequently activating the TRIP-effect. Our process resulted in ultra-high tensile strength of the high...