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发明公开
CN109136743A 一种核电项目核1级设备用大型钢锭及其生产方法 无效 - 撤回

一种核电项目核1级设备用大型钢锭及其生产方法
摘要：
本发明公开了一种核电项目核1级设备用大型钢锭及其生产方法，所述大型钢锭化学成分组成及质量百分含量为：C≤0.21%、Si：0.20～0.35%、Mn：0.45～0.70%、P≤0.015%、S≤0.003%、Ni：1.20～1.50%、Cr：0.85～1.20%、Mo：0.45～0.60%、Alt≥0.20%、B：0.001～0.005%，其余为Fe和不可避免的杂质元素；生产方法包括配料、精炼、真空处理、钢锭浇注、钢锭清理工序。本发明化学成分设计采用低磷低硫含量，最大单重级别为45.0t钢锭，满足了采用核电项目核1级设备用大型钢锭生产高难度、大厚度钢板需求，同时实现国内核电用钢出口国外的突破。
摘要（英）：

The invention discloses a large steel ingot used for nuclear-grade 1 equipment of a nuclear power project and a production method of the large steel ingot. The large steel ingot includes the followingchemical components: by mass, 0-0.21% of C, 0.20-0.35% of Si, 0.45-0.70% of Mn, 0-0.015% of P, 0-0.003% of S, 1.20-1.50% of Ni, 0.85-1.20% of Cr, 0.45-0.60% of Mo, 0.20% or above of Alt, 0.001-0.005%of B and the balance Fe and inevitable impurity elements. The production method includes the following steps of burdening, refining, vacuum treatment, steel ingot pouring and steel ingot cleaning processes. According to the steel ingot, the phosphorus content and the sulfur content are low, the maximum single grade is 45.0 t, and the requirements of producing high-difficulty and large-thickness steel plates with large steel ingots used for nuclear-grade 1 equipment of the nuclear power project are met, and meanwhile, a breakthrough in exporting domestic nuclear power steel abroad is achieved.

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