New Generation TMCP Technology and its Application to 960 MPa High Strength Structural Steel Plates

摘要

The new generation thermo-mechanical controlled processing (TMCP) technology based on advanced cooling technique and equipment is introduced here in the context of 960MPa grade high strength structural steel plates. This new technology accurately controls the cooling rate and temperature, with strong influence on phase transformation and precipitation including microstructure and mechanical properties of the steel. The application of the newly developed technology applied to the production of 960MPa grade high strength structural steel demonstrated its effectiveness, especially in improving low temperature impact toughness. The yield strength was 980～1000 MPa and tensile strength 1080～1200 MPa, with impact toughness approaching 150J at -40°C.