种加压感应与保护气氛电渣重熔双联制备高氮钢的方法

• Format: Patent
• Language: Chinese
• Published: 08.01.2019
• Subjects: ALLOYS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; METALLURGY OF IRON; PRETREATMENT OF RAW MATERIALS; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; PRODUCTION AND REFINING OF METALS; 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

种加压感应与保护气氛电渣重熔双联冶炼高氮钢的方法，高氮钢为高氮马氏体钢或高氮奥氏体钢，步骤包括：准备原料、确定冶炼压力和浇铸压力、加压感应熔炼、脱氧、浇铸、电渣重熔等。本发明的方法由于电渣重熔具有较高的凝固速度，可抑制氮的逸出，获得氮含量略高于常压溶解度的高氮钢重熔锭，且制备的高氮钢具有优良的耐腐蚀性能和力学性能；对于降低高氮钢的生产成本，采用保护气氛电渣重熔工艺制备氮含量略高于常压下溶解度的高氮钢是条新的途径。 The invention provides a method for preparing high-nitrogen steel through a combination of pressurized induction and protective-atmosphere electro-slag remelting. High-nitrogen martensitic steel or high-nitrogen austenitic steel serves as the high-nitrogen steel. The method comprises the following steps such as raw material preparation, determination of the melting pressure and the pouring pressure, pressurized induction melting, deoxidization, pouring, and electro-slag remelting. The method provided by the invention has the advantages that the solidification velocity of the electro-slag remelting process is relatively high, so that the escape of nitrogen can be inhibited, a high-nitrogen steel remelting ingot of which the nitrogen content is slightly higher than the normal-pressure solubility is obtaine