A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Magnesium-containing cored wire for steel rail production, steel rail and production method thereof
The invention discloses a magnesium-containing cored wire for steel rail production, a steel rail and a production method of the steel rail. The magnesium-containing cored wire comprises an outer skin and core powder wrapped in the outer skin, the core powder is Mg, Si, Fe3O4 and Fe which are uniformly mixed, and the outer skin is an aluminum-free low-carbon steel strip. The production method comprises a converter working procedure, an LF working procedure, an RH refining working procedure and a continuous casting working procedure, in the RH refining working procedure, a magnesium-containing core-spun yarn is fed into a steel ladle, and the adding amount of the magnesium-containing core-spun yarn is 2-6 m/ton of steel. By using the magnesium-containing cored wire, a large number of dispersed and distributed tiny inclusions can be generated in the steel, that is, a large number of dispersed and distributed MgO particles are formed in the heavy rail steel to serve as nucleation cores, growth of MnS and other types of inclusions is inhibited, and the situation of occurrence of large-particle inclusions is reduced, so that the grade of the inclusions in the steel is refined. According to the steel rail obtained through the method, in the inclusion rating, the A class is smaller than or equal to 1.5, and the other classes are smaller than or equal to 1.0 class.
本发明公开了一种用于钢轨生产的含镁包芯线、钢轨及其生产方法，含镁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、Fe3O4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，向钢包内喂入含镁包芯线，其中，所述含镁包芯线的加入量为2‑6m/吨钢。本发明通过含镁包芯线的使用，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 cored wire for steel rail production, steel rail and production method thereof
The invention discloses a magnesium-containing cored wire for steel rail production, a steel rail and a production method of the steel rail. The magnesium-containing cored wire comprises an outer skin and core powder wrapped in the outer skin, the core powder is Mg, Si, Fe3O4 and Fe which are uniformly mixed, and the outer skin is an aluminum-free low-carbon steel strip. The production method comprises a converter working procedure, an LF working procedure, an RH refining working procedure and a continuous casting working procedure, in the RH refining working procedure, a magnesium-containing core-spun yarn is fed into a steel ladle, and the adding amount of the magnesium-containing core-spun yarn is 2-6 m/ton of steel. By using the magnesium-containing cored wire, a large number of dispersed and distributed tiny inclusions can be generated in the steel, that is, a large number of dispersed and distributed MgO particles are formed in the heavy rail steel to serve as nucleation cores, growth of MnS and other types of inclusions is inhibited, and the situation of occurrence of large-particle inclusions is reduced, so that the grade of the inclusions in the steel is refined. According to the steel rail obtained through the method, in the inclusion rating, the A class is smaller than or equal to 1.5, and the other classes are smaller than or equal to 1.0 class.
本发明公开了一种用于钢轨生产的含镁包芯线、钢轨及其生产方法，含镁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、Fe3O4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，向钢包内喂入含镁包芯线，其中，所述含镁包芯线的加入量为2‑6m/吨钢。本发明通过含镁包芯线的使用，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 cored wire for steel rail production, steel rail and production method thereof
用于钢轨生产的含镁包芯线、钢轨及其生产方法
CHEN LIANG (author) / CHEN TIANMING (author) / LI HONGGUANG (author) / GUO YUEHUA (author)
2022-02-01
Patent
Electronic Resource
Chinese
| European Patent Office | 2022
Moderate-strength steel rail and production method thereof
| European Patent Office | 2022
Medium-strength steel rail and production method thereof
| European Patent Office | 2022
MODERATE-STRENGTH STEEL RAIL AND PRODUCTION METHOD THEREOF
| European Patent Office | 2024
Novel railhead profile steel rail and production method thereof
| European Patent Office | 2020