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首页> 外文期刊>Journal of Iron and Steel Research International >Effect of Aging Temperature on Erosion-Corrosion Behavior of 17-4PH Stainless Steels in Dilute Sulphuric Acid Slurry
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Effect of Aging Temperature on Erosion-Corrosion Behavior of 17-4PH Stainless Steels in Dilute Sulphuric Acid Slurry

机译：时效温度对稀硫酸浆液中17-4PH不锈钢冲蚀行为的影响

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摘要

The effect of aging temperature on erosion-corrosion (E-C) behavior of 17-4PH stainless steels in dilute sulphuric acid slurry containing solid particles was studied by using self-made rotating E-C apparatus. The effect of impact velocity on E-C behavior of 17-4PH steels at different aging temperatures was analyzed. Surface micrographs of the specimens after E-C test were observed by using scanning electron microscope (SEM). The results showed that under the condition of the same solution heat treatment, when aging temperature ranged from 400 deg C to 610 deg C , the hardness reached the highest value near the temperature 460 deg C. The characteristics of E-C for 17-4PH stainless steels at different aging temperatures were as follows; pure erosion (wear) was dominant, corrosion was subordinate and at the same time corrosion promoted erosion. The effect of aging temperature on E-C rate of 17-4PH steels was not significant at low impact velocity, but it was found that E-C resistance of 17-4PH steels aged near 460 deg C was the most excellent due to the best precipitation strengthening effect of fine and dispersed epsilon-Cu phase. With a prerequisite of appropriate corrosion resistance, the precipitation hardening could significantly improve the E-C resistance of the materials.
机译：利用自制的旋转式E-C装置研究了时效温度对17-4PH不锈钢在含固体稀硫酸稀浆中的腐蚀-腐蚀（E-C）行为的影响。分析了在不同时效温度下冲击速度对17-4PH钢的E-C行为的影响。使用扫描电子显微镜（SEM）观察E-C测试后的样品的表面显微照片。结果表明，在相同固溶热处理条件下，时效温度在400℃至610℃之间时，硬度在460℃附近达到最高值。17-4PH不锈钢的EC特性在不同的老化温度下如下：纯腐蚀（磨损）占主导地位，腐蚀从属，同时腐蚀促进腐蚀。在低冲击速度下，时效温度对17-4PH钢的EC率的影响并不显着，但是发现，由于460℃附近的最佳析出强化效果，在460℃附近时效的17-4PH钢的EC电阻最优异。细分散的ε-Cu相。在具有适当耐腐蚀性的前提下，沉淀硬化可以显着提高材料的耐E-C性能。

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