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发明公开
CN109487171A 一种耐盐酸腐蚀的耐蚀钢及其制备方法 有权

一种耐盐酸腐蚀的耐蚀钢及其制备方法
摘要：
本发明一种耐盐酸腐蚀的耐蚀钢，包括下述组分按重量百分比组成：Cr 12.00～15.00，Mo 2.00～4.00，Sn 0.25～0.65，Cu 0.30～0.50，Sb 0.10～0.40，Nb 0.15～0.25，Ti 0.05～0.15，C≤0.15，Fe余量。熔炼后得到是铸件，在1％HCl溶液中，15天的失重比≤0.05％。本发明通过适当调节合金元素含量，加入有助于提高在盐酸中耐蚀性的元素Mo、Sb、Cu等，通过砂模铸造及热处理，从而获得了一种适用于在含Cl-、SO42-、NH4+等离子的酸雾腐蚀条件工作的耐蚀钢，该钢种在低浓度盐酸中具有较好的耐蚀性，同时在NaCl、NH4Cl、NaSO42-中具有优良的耐蚀性，可用于解决罗茨鼓风机墙板、侧板受Cl-、SO42-、NH4+等离子的酸雾腐蚀问题，同时也可用于其他海洋耐蚀工件上。
摘要（英）：

The invention discloses hydrochloric acid corrosion-resistant corrosion-resistant steel. The steel comprises the following components of, by weight, 12.00-15.00 of Cr, 2.00-4.00 of Mo, 0.25-0.65 of Sn, 0.30-0.50 of Cu, 0.10-0.40 of Sb, 0.15-0.25 of Nb, 0.05-0.15 of Ti, less than or equal to 0.15 of C and the balance Fe. A casting is obtained after smelting, and in a 1% HCl solution, the weight loss ratio for 15 days is less than or equal to 0.05%. According to the steel, by properly adjusting content of the alloy elements, the elements Mo, Sb, Cu and the like which facilitate improvement of the corrosion resistance in hydrochloric acid are added, sand casting and heat treatment are carried out, so that the corrosion-resistant steel suitable for working the corrosion condition of acid mistcontaining plasma of Cl<->, SO4<2->, NH4<+> and the like is prepared, the steel has good corrosion resistance in low-concentration hydrochloric acid, and has excellent corrosion resistance in NaCl, NH4Cl and NaSo4<2->, the problem that a wallboard and a side plate of a Roots blower are subjected to acid mist corrosion of plasma of Cl<->, SO4<2->, NH4<+> and the like can be solved, and meanwhile, the steel can be applied to other marine corrosion-resistant workpieces.

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