Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Magnesium-containing composite cored wire for steel rail production, steel rail and production method of steel rail
The invention discloses a magnesium-containing composite cored wire for steel rail production, a steel rail and a production method of the steel rail. The magnesium-containing composite cored wire comprises a sheath and core powder wrapped in the sheath, wherein the core powder is uniformly mixed Mg, Si, calcium carbonate and Fe, and the sheath is an aluminum-free low-carbon steel strip. The production method comprises a converter procedure, an LF procedure, an RH refining procedure and a continuous casting procedure. In the RH refining procedure, the magnesium-containing composite cored wire is fed into a steel ladle, and the adding amount of the magnesium-containing composite cored wire is 2-6 m per ton of steel. By using the magnesium-containing composite cored wire, a large number of dispersedly distributed tiny inclusions can be generated in steel; that is, a large number of dispersedly distributed MgO particles are formed in heavy rail steel to serve as nucleation cores, so the growth of MnS and other types of inclusions is inhibited, the situation of occurrence of large-particle inclusions is reduced, and therefore, the grade of the inclusions in the steel is refined; and according to the steel rail obtained through the method, in inclusion rating, the class of A type inclusions is smaller than or equal to 1.5, and the classes of other types of inclusions are smaller than or equal to 1.0.
本发明公开了一种用于钢轨生产的含镁复合包芯线、钢轨及其生产方法，含镁复合包芯线包括外皮和包裹在外皮内的芯粉，所述芯粉为均匀混合的Mg、Si、碳酸钙及Fe，所述外皮为无铝低碳钢带。生产方法包括转炉工序、LF工序、RH精炼工序和连铸工序，其中，所述RH精炼工序中，向钢包内喂入含镁复合包芯线，其中，所述含镁复合包芯线的加入量为2‑6m/吨钢。本发明通过含镁复合包芯线的使用，可以在钢中生成大量弥散分布的微小夹杂物，即在重轨钢中形成大量弥散分布的MgO质点，作为形核核心，抑制MnS及其他类夹杂物的长大，降低大颗粒夹杂物出现的情况，从而细化钢中夹杂物评级，采用本申请得到的钢轨，夹杂物评级中，A类≤1.5级，其他各类≤1.0级。
Magnesium-containing composite cored wire for steel rail production, steel rail and production method of steel rail
The invention discloses a magnesium-containing composite cored wire for steel rail production, a steel rail and a production method of the steel rail. The magnesium-containing composite cored wire comprises a sheath and core powder wrapped in the sheath, wherein the core powder is uniformly mixed Mg, Si, calcium carbonate and Fe, and the sheath is an aluminum-free low-carbon steel strip. The production method comprises a converter procedure, an LF procedure, an RH refining procedure and a continuous casting procedure. In the RH refining procedure, the magnesium-containing composite cored wire is fed into a steel ladle, and the adding amount of the magnesium-containing composite cored wire is 2-6 m per ton of steel. By using the magnesium-containing composite cored wire, a large number of dispersedly distributed tiny inclusions can be generated in steel; that is, a large number of dispersedly distributed MgO particles are formed in heavy rail steel to serve as nucleation cores, so the growth of MnS and other types of inclusions is inhibited, the situation of occurrence of large-particle inclusions is reduced, and therefore, the grade of the inclusions in the steel is refined; and according to the steel rail obtained through the method, in inclusion rating, the class of A type inclusions is smaller than or equal to 1.5, and the classes of other types of inclusions are smaller than or equal to 1.0.
本发明公开了一种用于钢轨生产的含镁复合包芯线、钢轨及其生产方法，含镁复合包芯线包括外皮和包裹在外皮内的芯粉，所述芯粉为均匀混合的Mg、Si、碳酸钙及Fe，所述外皮为无铝低碳钢带。生产方法包括转炉工序、LF工序、RH精炼工序和连铸工序，其中，所述RH精炼工序中，向钢包内喂入含镁复合包芯线，其中，所述含镁复合包芯线的加入量为2‑6m/吨钢。本发明通过含镁复合包芯线的使用，可以在钢中生成大量弥散分布的微小夹杂物，即在重轨钢中形成大量弥散分布的MgO质点，作为形核核心，抑制MnS及其他类夹杂物的长大，降低大颗粒夹杂物出现的情况，从而细化钢中夹杂物评级，采用本申请得到的钢轨，夹杂物评级中，A类≤1.5级，其他各类≤1.0级。
Magnesium-containing composite cored wire for steel rail production, steel rail and production method of steel rail
用于钢轨生产的含镁复合包芯线、钢轨及其生产方法
CHEN LIANG (Autor:in) / CHEN TIANMING (Autor:in) / LI HONGGUANG (Autor:in) / TANG WEI (Autor:in)
18.02.2022
Patent
Elektronische Ressource
Chinesisch
Magnesium-containing cored wire for steel rail production, steel rail and production method thereof
| Europäisches Patentamt | 2022
Steel rail for high-speed railway and production method and application of steel rail
| Europäisches Patentamt | 2015
Steel rail for subways and preparation method of steel rail
| Europäisches Patentamt | 2020