Q345FRQ fire-resisting and earthquake-proof hot rolling angle steel used for public steel structure buildings and preparing method of Q345FRQ fire-resisting and earthquake-proof hot rolling angle steel

The invention discloses Q345FRD fire-resisting and earthquake-proof hot rolling angle steel used for public steel structure buildings and a preparing method of the Q345FRQ fire-resisting and earthquake-proof hot rolling angle steel. The preparing method of the fire-resisting and earthquake-proof hot...

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Bibliographische Detailangaben
Hauptverfasser:	DENG JIAMU, CHEN WEI, WANG WENFENG, ZHANG WEIQIANG, WANG TAO, ZHOU YUHAN, WEN YUBING, ZHANG ZHIBO
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS CHEMISTRY CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS FERROUS OR NON-FERROUS ALLOYS GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS METALLURGY METALLURGY OF IRON MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	The invention discloses Q345FRD fire-resisting and earthquake-proof hot rolling angle steel used for public steel structure buildings and a preparing method of the Q345FRQ fire-resisting and earthquake-proof hot rolling angle steel. The preparing method of the fire-resisting and earthquake-proof hot rolling angle steel includes the following steps that A, molten iron is subjected to pretreatment desulfuration; B, molten iron is smelted; C, deoxidation alloying is conducted; D, LF furnace refining is conducted on the molten iron; E, molten iron casting is conducted; F, a steel billet is heated; G, the steel billet is subjected to high-pressure water tank scale removing; H, breakdown mill pre-forming is conducted; I, universal mill continuous rolling is conducted; J, angle steel online boundary dimension detection is conducted; and K, finishing is conducted. By means of the Q345FRD fire-resisting and earthquake-proof hot rolling angle steel used for the public steel structure buildings and the preparing method