问题:转炉炼钢脱磷反应是()反应。A、放热B、吸热C、先吸热后放热D、不吸热不放热...
Friday, February 23, 2024
问题:样模内判断碳含量时,当钢水温度偏高时,碳的判断容易比实际()。...
Friday, February 23, 2024
Monday, September 12, 2022
Sunday, September 11, 2022
问题:单渣法操作脱硫时,脱硫能力低的时期是()。A、全过程相当B、吹炼前期C、吹炼中期D、吹炼后期...
Sunday, March 26, 2023
问题:生产沸腾钢所用的锰铁含Si量应小于2.0%。()...
Tuesday, November 21, 2023
问题:钢在加工过程中,其屈服点、抗拉强度等称之为()。A、物理性能B、工艺性能C、力学性能...
Tuesday, November 21, 2023
问题:转炉炼钢锰氧化在冶炼()速度快。A、初期B、中期C、后期D、任何时间...
Sunday, January 29, 2023
问题:炼钢用莹石CaF<sub>2</sub>要大于80%。()...
Sunday, September 11, 2022
问题:转炉炼钢碳与钢中氧是()反应。A、放热B、吸热C、先吸热后放热D、不吸热不放热...
Sunday, March 26, 2023
Sunday, September 11, 2022
问题:钢中氧的危害是()。A、冷脆B、热脆C、气泡D、夹杂...
Tuesday, November 21, 2023
Sunday, September 11, 2022
问题:吹炼过程中为保证化好过程渣,将终渣R按()控制,不低于()。...
Tuesday, November 21, 2023
Monday, September 12, 2022
问题:炼钢用萤石主要作用是改善炉渣的流动性,但用量过多时易引起喷溅、且损坏炉衬,对人体和环境无害。()...
Tuesday, May 23, 2023
Sunday, September 11, 2022
问题:()属于内生夹杂物。A、脱氧产物B、卷入炉渣C、二次氧化D、侵蚀炉衬...
Friday, March 10, 2023
问题:以下分子式中()是铁矿石的主要成分。A、CaF2B、MgO.CaOC、CaOD、Fe2O3...
Tuesday, May 23, 2023
Wednesday, January 3, 2024