种加压电渣重熔气相渗氮冶炼高氮马氏体不锈钢的方法

• Format: Patent
• Language: Chinese
• Published: 10.07.2018
• 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; PRETREATMENT OF RAW MATERIALS; 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 OF ALLOYS OR NON-FERROUS METALS

本发明属于高氮钢冶炼领域，具体涉及种加压电渣重熔气相渗氮冶炼高氮马氏体不锈钢的方法，该方法根据目标钢种成分，利用真空感应炉冶炼无气孔、无氮的高纯净马氏体不锈钢自耗电极；在氮气保护下采用固态起弧的方法进行起弧造渣；向熔炼室内充入氮气增压至2～5MPa，同步提升冷却水压力，采用低熔速在38～43V、2900～4000A下冶炼；对于目标氮含量高于0.3％的钢种，按上述步骤进行第二次加压电渣重熔。其优点是通过合理控制工艺参数及氮气压力，在低熔速下实现了氮合金化的高效进行，可制备出氮含量较高、成分均匀、组织性能优异的高氮马氏体不锈钢。 The invention belongs to the field of smelting of high-nitrogen steel, and in particular, relates to a method for smelting high-nitrogen martensite stainless steel by pressurized electroslag remelting gas-phase nitriding. The method comprises the following steps: according to components of a target steel type, a vacuum induction furnace is used for smelting a high-purity martensite stainless steel consumable electrode without air holes and nitrogen; the arc starting slagging is performed by a solid-state arc starting method under nitrogen protection; nitrogen is filled in a smelting chamber for pressurizing to 2-5 MPa, meanwhile, the cooling water pressure is increased, and the smelting is performed at low smelting speed of 38-43 V under 2900-4000