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

              2018-11-05 09:52:00
              LUQIMENG
              Original
              2328
              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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