Ultrafine-Grained Steel Produced by Warm Rolling and Annealing of Lath Martensite

Xin Zhao; Xiao Ling Yang

doi:10.4028/www.scientific.net/MSF.667-669.863

Paper Titles

Enhancing Strength and Maintaining Ductility of Mg-3%Li-1%Sc Alloy by Equal Channel Angular Pressing
p.839

Comparison of High-Temperature Compressive Deformation Characteristics of Differently Processed LY12 Aluminum Alloys
p.845

Distribution of Mechanical Properties by Volume in Titanium Billets Processed by Twist Extrusion
p.851

Mechanical Spectroscopy of Ultrafine Grained Copper
p.857

Ultrafine-Grained Steel Produced by Warm Rolling and Annealing of Lath Martensite
p.863

Flow Behaviour of Commercial Purity Titanium Subjected to Equal Channel Angular Pressing
p.867

Near-Threshold Fatigue Crack Propagation in an ECAP-Processed Ultrafine-Grained Aluminium Alloy
p.873

Effect of ECAP on the Microstructure and Mechanical Properties of 17-4PH Stainless Steel
p.879

Precipitation Effect on Work Hardening Behavior of ECAP-Deformed Al-4%Cu Alloy
p.885

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Ultrafine-Grained Steel Produced by Warm Rolling and Annealing of Lath Martensite

Abstract:

Steel plates with lath martensite microstructure were rolled up to 68% reduction at 673 K and then annealed at 473-973 K. The microstructure evolution was studied by using an optical microscope and a transmission electron microscopy. And the properties were investigated by using tensile tests and hardness tests. Results show that ultrafine grains + nano-carbides are obtained in the steel plates. The specimen annealed at 823 K has a good combination of strength and ductility. The tensile strength and total elongation are 1028 MPa and 7.2%, respectively. And the hardness is 338 Hv.