摘要：AN INDUSTRIAL EXPERIMENT OF DEVELOPING 540MPA GRADE DUAL-PHASE HOT STRIP STEEL USING ULTRA-FAST COO...AN INDUSTRIAL EXPERIMENT OF DEVELOPING 540MPA GRADE DUAL-PHASE HOT STRIP STEEL USING ULTRA-FAST COOING TECHNOLOGY ON BAOTOU CSP LINE WAS INTRODUCED IN THE PRESENT WORK. THE TEST DUAL-PHASE STEEL,WHOSE THICKNESS IS OF 6 MM, WAS RODUCED BY USING THIN-SLAB CONTINUOUS ROLLING AND TWO STAGE COOLING PROCESS, INCLUDING OF LAMINAR AND ULTRA FAST COOLING; THE MICROSTRUCTURES OF THE TEST DUAL-PHASE STEEL ARE FERRITE AND MARTENSITE. THE VOLUME FRACTION OF MARTENSITE IS 12％; THE MECHANICAL PROPERTIES OF THE TEST DUAL-PHASE STEEL ARE UNIFORM IN WIDTHWISE AND LENGTHWISE WITH THE TENSILE STRENGTH OF 555565MPA, THE YIELD STRENGTH OF 335~355MPA, THE TOTAL ELONGATION OF 31~34％, THE YIELD RATIO OF 0.59~0.64 AND THE N VALUE OF 0.18. THE TEST DUAL-PHASE STEEL WITH GOOD SERVICE PERFORMANCE HAS BEEN USED TENTATIVELY FOR MAKING THE BEAM AND THE TAIL-BOARD OF HEAVE-DUTY TRUCK.显示全部
摘要：BY ROLLING EXPERIMENTS OF THE Q345C 220MM –THICKNESS STOCK OF CONTINUOUS METAL CAST PROCESS OF SHO...BY ROLLING EXPERIMENTS OF THE Q345C 220MM –THICKNESS STOCK OF CONTINUOUS METAL CAST PROCESS OF SHOU QIN IN LAB, WITH THE APPROACH OF MICROSTRUCTURE DISSYMMETRY CONTROL ROLLING, THE HIGH STRENGTH PLATE STEEL WITH 70MM THICKNESS WAS PRODUCED, THE CONTROLLING OF THE STRENGTH 、DUCTILITY AND TOUGHNESS OF THE STEEL WAS CARRIED OUT IN THIS PAPER, WORK OVER THE RELATION BETWEEN CONTROL ROLLING PROCESS AND THE MICROSTRUCTURE OF THE STEEL, ANALYZE THE MICROSTRUCTURE OF THE PLATE STEEL.显示全部
摘要：THE DEFORMATION RESISTANCE TO OF X80 PIPELINE STEEL DURING HOT FORMATION HAS BEEN STUDIED THROUGH G...THE DEFORMATION RESISTANCE TO OF X80 PIPELINE STEEL DURING HOT FORMATION HAS BEEN STUDIED THROUGH GLEEBLE-2000 SIMULATOR, AND THE RELATIONSHIP AMONG DEFORMATION TEMPERATURE, STRAIN RATE, DEGREE OF DEFORMATION AND DEFORMATION RESISTANCE HAS BEEN ESTABLISHED. THE RESULTS SHOW THAT THE DEFORMATION RESISTANCE IS AFFECTED REMARKABLY BY BOTH STRAIN RATE AND DEFORMATION TEMPERATURE. ACCORDING TO THE RESULTS OF ACTUAL MEASUREMENT, THE MODEL OF DEFORMATION RESISTANCE OF X80 PIPELINE STEEL HAS BEEN ESTABLISHED AND HAS HIGH FITTING PRECISION.显示全部
摘要：TARGET OF CONTROLLING COOLING AFTER ROLLING HAS BEEN DEVELOPING FROM COILING TEMPERATURE TO COOLING...TARGET OF CONTROLLING COOLING AFTER ROLLING HAS BEEN DEVELOPING FROM COILING TEMPERATURE TO COOLING RATE 、TO COOLING PATH 、TO MICROSTRUCTURE AND MECHANICAL PROPERTY. UNDER THIS TREND, THE OBJECT OF THIS ARTICLE IS TO DISCUSS THE FLEXIBLE CONTROLLING ON RUNOUT TABLE COOLING AND TO CREATE THE RELATIONSHIP BETWEEN CCT CURVE AND SPRAY BANK LAYOUT, TO MAKE THE RELATIONSHIP BETWEEN COOLING RATE AND SPRAY JET OPEN SEQUENCE.THIS CONTROLLING TECHNOLOGY HAS BEEN USED SUCCESSFULLY IN INDUSTRY EXPERIMENT ,DECREASING THE RATIO OF YIELD STRESS AND TENSILE STRESS IN HP 295 STEEL GRADE.显示全部
摘要：USING HYDRAULIC SERVO FATIGUE EXPERIMENT MACHINE, THE STUDY ON 400MPA SUPER-STEEL HIGH CYCLE FATIGU...USING HYDRAULIC SERVO FATIGUE EXPERIMENT MACHINE, THE STUDY ON 400MPA SUPER-STEEL HIGH CYCLE FATIGUE PERFORMANCE UNDER SYMMETRICAL CYCLE STRESS CONDITION WERE CARRIED OUT. THE S-N CURVE WAS DRAWN OUT AND THE RELATION EXPRESSION WAS SUMMARIZED OUT. THE FATIGUE CRACK FEATURE WAS ANALYZED BY AID OF OBSERVATION OF CRACK PROFILE UNDER SEM. THE CRACKING MECHANISM WAS INFERRED OUT THROUGH OBSERVATION OF MICROSTRUCTURE NEAR CRACK BY USING TEM.显示全部
摘要：THE SOFTENING BEHAVIOR OF DEFORMED AUSTENITE OF WEATHERING STEEL WITHIN INTERVAL OF PASSES IS RESEA...THE SOFTENING BEHAVIOR OF DEFORMED AUSTENITE OF WEATHERING STEEL WITHIN INTERVAL OF PASSES IS RESEARCHED USING DOUBLEPASS COMPRESSION METHOD THROUGH MMS100-SIMULATOR, AND THE INFLUENCE OF TEMPERATURE AND INTERVAL TIME ANALYZED. THE STATIC RECRYSTALLIZATION DYNAMICS MODEL WAS BUILT AND THE STATIC RECRYSTALLIZATION ACTIVATION ENERGY OF WEATHERING STEEL WAS DETERMINED TO BE ABOUT 190.57KJ /MOL.显示全部
摘要：THE ROLL WEAR MODEL FOR 1700 HOT STRIP MILL (HSM) WAS RESEARCHED AND THE FACTORS AFFECT ROLL WEAR W...THE ROLL WEAR MODEL FOR 1700 HOT STRIP MILL (HSM) WAS RESEARCHED AND THE FACTORS AFFECT ROLL WEAR WERE ANALYZED.THE SIMULATION PROGRAM WAS COMPILED AND WORK ROLL WEAR WAS CALCULATED ACCORDING TO THE ROLLING SCHEDULE. THE RELATION OF STRIP WIDTH, STRIP LENGTH AND WORK ROLL WEAR WAS OBTAINED. ROLL WEAR CURVE CALCULATED BY PROGRAM WERE GOOD AGREEMENT WITH THE WEAR CURVE GOT BY HIGH-PRECISION GRINDER. THE RESULTS SHOW THAT THE ROLL WEAR MODEL HAS HIGH ACCURACY.显示全部
摘要：DYNAMIC RECRYSTALLIZATION BEHAVIOR OF MN-CU WEATHERING STEEL WERE STUDIED USING A MMS-100 THERMOMEC...DYNAMIC RECRYSTALLIZATION BEHAVIOR OF MN-CU WEATHERING STEEL WERE STUDIED USING A MMS-100 THERMOMECHANICAL MACHINE. THE EXPERIMENTAL RESULTS SHOW THAT DEFORMATION TEMPERATURE, STRAIN RATE, AND DEFORMATION AMOUNT HAVE IMPORTANT EFFECT ON THERMAL DEFORMATION BEHAVIOR. STRESS EXPONENT N AND ACTIVATION ENERGY Q WERE DETERMINED AS 5.48 AND 332.7 KJ/MOL RESPECTIVELY BY REGRESSION ANALYSIS, AND THE RELATION OF CRITICAL STRAIN AND ZENER-HOLLOMON PARAMETER WAS ALSO DETERMINED.显示全部
摘要：EFFECTS OF TWO KINDS OF TMCP ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HSLA WITH COPPER-BEARIN...EFFECTS OF TWO KINDS OF TMCP ON MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HSLA WITH COPPER-BEARING USED IN WELDING BOGIE FRAME OF HIGH-SPEED TRAINS WERE INVESTIGATED. THE EXPERIMENT RESULT SHOWED THAT BAINITE CONTENT, YIELD STRENGTH AND TENSILE STRENGTH WERE INCREASED WITH DECREASING OF FINAL COOLING TEMPERATURE. HOWEVER, ELONGATION RATE WAS GREATLY DECREASED. WHEN FINISHING ROLLED TEMPERATURE WAS REDUCED FROM 880 TO 840 AND FINAL COOLING TEMPERATURE WAS 580, THE TESTED STEEL HAS HIGHER STRENGTH AND BETTER LOW TEMPERATURE TOUGHNESS.显示全部
摘要：TARGET OF CONTROLLING COOLING IN HOT STRIP MILL IS NOT ONLY COILING TEMPERATURE. COOLING RATE PLAY ...TARGET OF CONTROLLING COOLING IN HOT STRIP MILL IS NOT ONLY COILING TEMPERATURE. COOLING RATE PLAY GREAT ROLE ON MICROSTRUCTURE AND MECHANICAL PROPERTY OF STRIP .IT’S USEFUL TO LEARN IMPACT ON COOLING RATE BY FACTORS, SUCH AS DT, VELOCITY AND THICKNESS. THE IMPACTING RULES ARE PRESENTED BY THIS ARTICLE. WHILE, THE RELATIONSHIP BETWEEN COOLING RATE AND SPRAY JET OPENING SEQUENCE ARE MADE ACCORDING TO COOLING EFFICIENCY OF SINGLE JET. IT’S A GUIDELINE TO MAKE PROPER PARAMETERS OF COOLING RATE CONTROLLING.显示全部
