CN105924171B - 一种耐氧化腐蚀和耐热冲击性能兼具的保护套管及其制备方法 - Google Patents

一种耐氧化腐蚀和耐热冲击性能兼具的保护套管及其制备方法 Download PDF

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CN105924171B
CN105924171B CN201610192176.0A CN201610192176A CN105924171B CN 105924171 B CN105924171 B CN 105924171B CN 201610192176 A CN201610192176 A CN 201610192176A CN 105924171 B CN105924171 B CN 105924171B
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蒋超
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Abstract

本发明属于耐热材料制备领域，具体涉及一种耐氧化腐蚀和耐热冲击性能兼具的保护套管及其制备方法。通过碳化硅、石墨、含碳树脂粉、硼玻璃粉、长石粉、硅粉、粘土的协同作用，在提高套管抗氧化腐蚀性的同时，大幅度增加了其耐高温冲击性能，套管的使用寿命成倍提高，确保了在高温环境下的长期使用。

Description

一种耐氧化腐蚀和耐热冲击性能兼具的保护套管及其制备 方法
技术领域
本发明属于耐热材料制备领域，具体涉及一种耐氧化腐蚀和耐热冲击性能兼具的保护套管及其制备方法。
背景技术
耐高温套管具有许多其他同类管材难以取代得特点：耐高温性能、保温隔热性能、阻燃性能、电绝缘性能、化学稳定性能、耐气候老化性能、耐寒、耐水、耐油、耐臭氧、耐电压、耐电弧、耐电晕性能等，安全环保，适合高温环境下工作。在高温下工作的热电偶和加热辐射器，对其套管材料有更严格的要求。
目前，常用的热电偶或加热辐射器的保护套管是采用不锈钢钢管材料，工作时长时间处于氧化气氛中，使用该保护套管易产生严重侵蚀，从而影响整个设备的顺利工作；常用的氧化铝保护套管虽然耐腐蚀性能良好，但抗热震性性能较差，受热过程中料层收缩容易导致保护套管破裂损坏。
发明内容
本发明所要解决的技术问题在于：提供一种耐氧化腐蚀和耐热冲击性能兼具的保护套管，该套管的组成按重量份数计算包括如下组分：
其中，含碳树脂粉为德国瑞嘉化工所生产，
长石粉优选钾长石，
粘土为英格瓷HYMOD型号的产品，
上述的组分中，含碳树脂粉、石墨、粘土的作用主要是增强抗热冲击性；碳化硅的作用是抗侵蚀磨损；硼玻璃粉、长石作用是抗氧化；在此基础上，通过加入硅粉，在高温下形成二氧化硅，与粘土和硼玻璃粉结合在一起产生自愈效果，大幅提高了套管材料的抗热冲击性能。
本发明还提供了一种上述保护套管的制备方法，具体为：
将各组分混合均匀后于60～75℃下干燥20～40分钟，高压成型后烧制，自然冷却后得到保护套管，
其中，高压成型为于100bar的压力下保持10分钟，整体压制时间30分钟左右；
烧制温度为1250℃保持2至4小时，整个烧制周期为48小时。
本发明的有益效果在于：本发明通过各成分之间的协同作用，在提高套管抗氧化腐蚀性的同时，大幅度增加了其耐高温冲击性能，避免了由于烧结料层的收缩造成的保护套管损坏现象，比常规产品节能30％，使用寿命成倍提高，从而确保了套管即整体设备在高温环境下的长期使用。
具体实施方式
实施例1
一种耐氧化腐蚀和耐热冲击性能兼具的保护套管，该套管的组成按重量份数计算包括如下组分：
将上述各组分混合均匀后于65℃下干燥40分钟，于100bar的压力下整体压制30分钟成型后，于1250℃下烧制48小时，自然冷却后得到保护套管。
将本实施例中制备的套管从常温瞬间至于800℃高温环境下，并保持25分钟，再从高温环境下取出并于常温下自然冷却，循环此实验过程1200次，套管未发生断裂。
将本实施例中制备的套管的2/3部分浸没于高温锌铝合金液中，四个月后取出对套管表面冲洗干净，未发现套管有变细的现象；而市售的普通套管也浸渍到相同的合金液中仅15天后，位于合金液液面处的套管明显变细，甚至趋于断裂。
实施例2
一种耐氧化腐蚀和耐热冲击性能兼具的保护套管，该套管的组成按重量份数计算包括如下组分：
套管的制备工艺如实施例1。
将本实施例中制备的套管从常温瞬间至于800℃高温环境下，并保持25分钟，再从高温环境下取出并于常温下自然冷却，循环此实验过程1200次，套管未发生断裂。
将本实施例中制备的套管的2/3部分浸没于与实施例1中相同的锌铝合金液中，四个月后取出对套管表面冲洗干净，未发现套管有变细的现象。
对比实施例1
与实施例1相比，配方中省去了含碳树脂粉，其余组分及制备工艺不变：
套管的制备工艺如实施例1。
将本实施例中制备的套管从常温瞬间至于800℃高温环境下，并保持25分钟，再从高温环境下取出并于常温下自然冷却，循环此实验过程420次，套管断裂。
对比实施例2
与实施例2比，配方中省去了硅粉，其余组分及制备工艺不变：
套管的制备工艺如实施例1。
将本实施例中制备的套管从常温瞬间至于800℃高温环境下，并保持25分钟，再从高温环境下取出并于常温下自然冷却，循环此实验过程120次，套管断裂。
对比实施例3
与实施例2相比，配方中省去了硼玻璃粉，其余组分及制备工艺不变：
套管的制备工艺如实施例1。
将本实施例中制备的套管从常温瞬间至于800℃高温环境下，并保持25分钟，再从高温环境下取出并于常温下自然冷却，循环此实验过程140次，套管断裂。
对比实施例4
与实施例2相比，配方中省去了粘土，其余组分及制备工艺不变：
套管的制备工艺如实施例1。
将本实施例中制备的套管从常温瞬间至于800℃高温环境下，并保持25分钟，再从高温环境下取出并于常温下自然冷却，循环此实验过程155次，套管断裂。

Claims (7)

1.一种耐氧化腐蚀和耐热冲击性能兼具的保护套管，其特征在于：所述套管的组成按重量份数计算包括如下组分：
2.如权利要求1所述的耐氧化腐蚀和耐热冲击性能兼具的保护套管，其特征在于：所述含碳树脂粉为德国瑞嘉化工所生产。
3.如权利要求1所述的耐氧化腐蚀和耐热冲击性能兼具的保护套管，其特征在于：所述长石粉为钾长石。
4.如权利要求1所述的耐氧化腐蚀和耐热冲击性能兼具的保护套管，其特征在于：所述粘土为英格瓷HYMOD型号的产品。
5.如权利要求1至4所述的保护套管的制备方法，其特征在于：所述制备方法为，
将各组分混合均匀后于60～75℃下干燥20～40分钟，高压成型后烧制，自然冷却后得到保护套管。
6.如权利要求5所述的保护套管的制备方法，其特征在于：高压成型为于100bar的压力下保持10分钟，整体压制时间30分钟。
7.如权利要求5所述的保护套管的制备方法，其特征在于：烧制温度为1250℃，整个烧制周期为48小时。
CN201610192176.0A 2016-03-30 2016-03-30 一种耐氧化腐蚀和耐热冲击性能兼具的保护套管及其制备方法 Active CN105924171B (zh)

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