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我厂生产的耐酸水泵,用于井下PH>2的酸性水中。1965年以前,水泵的零部件的材质采用ZG1Cr18Ni9Ti或ZG1Cr18Ni9。它们的铸造性能和耐腐蚀性能都很好,但由于我国镍的材料来源缺乏,为了节省镍的用量,选用了ZGCr17Ni2耐酸不锈钢,从1965年开始生产到现在,取得了一些经验,也总结了一些成熟的工艺方法,现综述如下。况以一、ZGCr17Ni2的化学成分和性能ZGCr17Ni2钢的化学成分(%) CO.11～0.17 Si≤0.80 Mn≤0.80 Cr16～18 Ni1.5～2.5 S≤0.03 P≤0.045 首先从合金状态图看。图1a为含铬18%和不同含镍量的铁铬镍合金状态图。斜线标注部分为ZGCr17Ni2钢在状态图上的位置。例如,当含镍量为2%时,合金随温度的变化而发生相变。当温度在1500～1080℃之间,为α相,当冷却到1080～650℃之间。为α+γ相;而在650℃以下,又为α相。因此,由于产生相变,当然可以用热处理的方
Acid-resistant water pump produced by our factory is used in acidic water with PH> 2 underground. Prior to 1965, the pump parts using ZG1Cr18Ni9Ti or ZG1Cr18Ni9. Their casting performance and corrosion resistance are good, but due to the lack of nickel material sources in our country, in order to save the amount of nickel, the selection of ZGCr17Ni2 acid-resistant stainless steel, from 1965 to the present production has made some experience, but also summed up some Mature technology methods, are summarized below. Conditions to a ZGCr17Ni2 the chemical composition and properties of ZGCr17Ni2 steel chemical composition (%) CO.11 ~ 0.17 Si ≤ 0.80 Mn ≤ 0.80 Cr16 ~ 18 Ni1.5 ~ 2.5 S ≤ 0.03 P ≤ 0.045 First of all, from the alloy state diagram. Figure 1a shows the state diagram of Fe-Cr-Ni alloy with 18% chromium and different nickel contents. Slashed part of the marked ZGCr17Ni2 steel position on the state diagram. For example, when the amount of nickel is 2%, the alloy changes with temperature. When the temperature is between 1500 ~ 1080 ℃, α phase, when cooled to between 1080 ~ 650 ℃. For the α + γ phase; and below 650 ℃, but also for the α phase. Therefore, it is of course possible to use the heat-treated side as a result of the phase change