API 全名是美国石油学会,API-571主要是对金属腐蚀失效的各种情况有一个介绍。 按照标准,各种失效模式被分为7大类: 1. 所有工业 - 机械和冶金上的失效 2. 所有工业 - 均匀或者局部厚度损失 3. 所有工业 - 高温腐蚀 (> 204 摄氏度) 4. 所有工业 - 环境腐蚀开裂 5. 炼油厂 - 均匀或者局部厚度损失 6. 炼油厂 - 环境腐蚀开裂 7. 炼油厂 - 其他失效模式 今天简单介绍一下 1-2 软化 Softening (Spheroidization) 软化主要也是因为钢在高温(440°C to 760°C) 环境下的微观结构的变化,这里的碳主要会变成球形,然后聚集从降低的金属的强度和抗蠕变性。。。主要会影响碳钢和低合金钢。 软化(球化)在现场很难观测到,一般都需要破坏检测,需要切开金属,抛光后来看微观结构。。。常见的检测方式是用放置金属式样在服役环境下,这样在一定时间后可以取出式样来做微观分析。。。 这次的失效和1-1石墨化的失效模式算是交叉共生的,在低于552°C的环境下,石墨化优先于软化;反之,软化优先于石墨化。。 又是一种不太常见的失效模式。。。。 ![image.png](https://cdn.steemitimages.com/DQmNhfjpRfXb4dwDUYyEsPLG6W79o9tbjxg1q8jKL2gu515/image.png)
author | shenchensucc |
---|---|
permlink | api-571-1-2-softening-spheroidization |
category | cn |
json_metadata | {"tags":["cn"],"image":["https://cdn.steemitimages.com/DQmNhfjpRfXb4dwDUYyEsPLG6W79o9tbjxg1q8jKL2gu515/image.png"],"app":"hiveblog/0.1","format":"markdown"} |
created | 2021-09-09 04:12:39 |
last_update | 2021-09-09 04:12:39 |
depth | 0 |
children | 0 |
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body_length | 607 |
author_reputation | 100,205,759,373,709 |
root_title | "API 571 失效模式 1-2 软化 Softening (Spheroidization)" |
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