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Q OTHERS DEOXIDATION A A REACTION OF MANIPULATION TO GET RID OF OXYGEN CAUSED EXCESSIVELY IN MOLTEN STEEL IN ORDER TO REMOVE GAS OR SLAG BY OXIDIZING IMPURITIES SUCH AS CARBON, SILICON, PHOSPHORUS DURING THE COURSE OF STEELMAKING AND SMELTING.RN
Q OTHERS SULFUR (S) A SULFUR REACTS WITH IRON TO FORM FES COMPOUND, CAUSING HOT SHORTNESS. S CAN UNDERMINE TENSILE STRENGTH, ELONGATION AND IMPACT VALUE AND BE A CAUSE OF BREAKING WHILE PROCESSED. IN ORDER TO PREVENT EMBRITTLEMENT, MN IS ADDED TO FORM MNS WITH A HIGH FUSION POINT. THE COMBINATION WITH ZR, TI AND MO BOOSTS MACHINE ABILITY AND DETERIORATES WELDABILITY AND FORGE WELDABILITY. RN
Q OTHERS PHOSPHORUS (P) A ALTHOUGH PHOSPHORUS SLIGHTLY INCREASES HARDNESS AND TENSILE STRENGTH, IT TRIGGERS THE REDUCTION OF AREA. IT REDUCES SHOCK RESISTANCE AND CAUSES COLD SHORTNESS BY CREATING FE3P COMPOUND. RN
Q OTHERS MANGANESE (MN) A MANGANESE ENHANCES QUENCHING AND STRENGTH WITHOUT REDUCING ELONGATION. MN STIMULATES FIRING AT HIGH TEMPERATURE, HELPING THE FORMING PROCESS OF THE STEEL. IT IS APPROPRIATE FOR WELDING BECAUSE IT IS NOT SENSITIVE TO HEAT TREATMENT IN THE EVENT OF ALLOYING. RN
Q OTHERS SILICON (SI) A SILICON INCREASES HARDNESS, ELASTIC CONSTANT AND TENSILE FORCE, WHILE DECREASING ELONGATION, IMPACT VALUE AND WELDABILITY. DURING THE STEELMAKING PROCESS, SI IS USED AS A DEOXIDIZER. RN
Q QUALITY CARBON (C) A CARBON COMPRISES CARBIDES TOGETHER WITH FE, CR, MO AND V. C IMPROVES STEEL STRENGTH BUT REDUCES DUCTILITY AND TENACITY. RN
Q QUALITY CARBON EQUIVALENT, CEQ A IN STEELMAKING, ALLOYING ELEMENTS CAN BE ADDED IN AN AIM TO IMPROVE HARDENABILITY AND RESISTANCE OF CORROSION AND HEAT. THESE ELEMENTS DECREASE CRITICAL COOLING RATE AND TRANSFORMATION TEMPERATURE, MAKING IT EASIER TO TRANSFORM INTO MARTENSITE AND THUS INCREASING HARDENABILITY. THE CARBON EQUIVALENT CONTENT IS TO CONVERT THE PERCENTAGE OF ALLOYING ELEMENTS OTHER THAN CARBON TO THE EQUIVALENT CARBON PERCENTAGE. IN WELDING, THE CARBON EQUIVALENT IS USED AS A STANDARD TO DETERMINE PREHEATING AND INTERPASS TEMPERATURE. RN
Q PRODUCTS RIB A TRANSVERSE BANDS.
Q PRODUCTS NODE A VERTICAL RIBS ON THE STEEL COLUMN.RNRN
Q QUALITY NOMINAL PERIMETER A THE PERIMETER WHEN CONVERTED INTO ROUND STEEL.
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