Objective THE AIM OF THIS RESEARCH IS TO DEVELOP NEW PRODUCTION PROCESSES THAT REDUCE THE COST OF HIGH-STRENGTH BOLTS BELONGING TO CLASS 8.8 (YIELD STRENGTH 640N/MM2 AND ULTIMATE TENSILE STRENGTH 800 N/MM2) COMMONLY USED IN THE MECHANICAL ENGINEERING AND MOTOR INDUSTRIES. THE RESEARCH INVOLVES COMPARING THE PROCESSING AND SERVICE PROPERTIES OF HIGH-STRENGTH BOLTS OBTAINED, ON THE ONE HAND, BY THE TRADITIONAL METHOD, I.E. QUENCHING AND TEMPERING AND, ON THE OTHER HAND, FROM A WIRE ROD SUBJECTED TO QUENCHING AND SELF-TEMPERING USING ROLLING HEAT AND FROM A WIRE ROD TEMPERED AND QUENCHED IN COILS USING REHEATING. THE PROGRAMME RELATES TO TWO DIFFERENT WIRE-ROD DIAMETERS IN THE 8-14 MM RANGE IN EITHER C-MN STEEL TREATED IN THE ROLLING HEAT OR 0.2% C BORON STEEL TEMPERED AND QUENCHED IN COILS. PRODUCTION TESTS ON INDUSTRIAL PLANTS AND PRODUCT CHARACTERIZATION TESTS IN THE LABORATORY ARE BEING CONDUCTED WITH THE AIM OF: - STUDYING THE WEAR BEHAVIOUR OF DIFFERENT QUALITIES OF BOLT COLD-STAMPING AND DEBURNING EQUIPMENT; - DRAWING UP A COMPREHENSIVE FILE ON THE PROPERTIES OF BOLTS MANUFACTURED BY THE NEW PROCESSES WITH A VIEW TO USER ACCEPTANCE. Programme(s) ECSC-STEELRES 6C - Medium-term orientation (ECSC) "steel research in relation to the General Objectives for Steel", 1981-1985 Topic(s) Data not available Call for proposal Data not available Funding Scheme Data not available Coordinator ARBED EU contribution No data Address AVENUE DE LA LIBERTE BP 1802 2930 LUXEMBOURG Luxembourg See on map Total cost No data