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        Launch Of A New Class of 3 rd Generation Cold Formable AHSS

        2018-11-05 09:52:00
        LUQIMENG
        Original
        2614
        Overview
        ? History / Technological Breakthroughs
        ? Current Status
        o NanoSteel 3 rd Generation AHSS Technology
        ? Enabling Structures and Mechanisms
        o Performance Characteristics
        ? Tensile Properties
        ? Bend Performance
        ? Bi-Axial Performance
        ? Forming Limit Diagram
        o Novel Performance Characteristics
        ? Local Formability at Hole Expansion
        ? Draw ability & Hydrogen Assisted Delayed Cracking Resistance


        NanoSteel’s Advanced High-Strength Sheet steels are designed for production in conventional steel mills using existing technology.

        NanoSteel 3 rd Generation AHSS Technology

        Performance Characteristics

        Novel Performance Characteristics


        Controlled by:
        ? Hole Preparation e.g. die clearance, punch geometry
        ? Global Materials Properties: e.g Total elongation, UTS, post uniform elongation

        ? Microstructure response to stress adds additional optimization variable


        Drawing Conditions
        ? Cups drawn to LDR at 1.9 draw ratio
        ? Cups exposed to 100% hydrogen for 45 minutes
        ? Exposed cups monitored in air for over 6 months

        ? Exposure to hydrogen for 10 minutes after each incremental 5% increase in strain
        ? Samples exposed to 100% hydrogen while under load for 45 minutes
        ? Clamped for >100 hours after exposure without cracking

        o NanoSteel 3 rd Generation AHSS Technology
        ? Initial product delivered for OEM testing at 60,000 MPa%
        ? Enabled due to unique structures and mechanisms
        o Compelling Performance Characteristics
        ? Strength & ductility combination
        ? Bend ability with low R/t ratio
        ? Bi-axial performance with high Limiting Dome Height
        ? Superior Forming Limit Diagram
        o Novel Performance Enabled by Specific Microstructural Response to Stress
        ? High local formability for Hole Expansion
        ? Avoidance of hydrogen assisted delayed cracking resistance at LDR



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