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What factors can affect the brightness of stainless steel seamless tube?

2022-01-09

不锈钢无缝管的应用越来越多,随处可见它的身影。不锈钢无缝管的生产厂家众多,不锈钢无缝管的质量成为人们关注的焦点。不锈钢无缝管退火后的光亮度决定了产品的质量。影响无缝钢管亮度的因素也比较多,列出了5个重要因素,仅供读者参考。


、退火温度是否达到规定温度。 

Stainless steel heat treatment is generally taken solution heat treatment, which is commonly known as "annealing", the temperature range of 1120 ℃ (Japanese standards). You can also observe through the annealing furnace observation hole, the annealing zone of the stainless steel tube should be incandescent state, but did not appear softening sag.

2. Annealing atmosphere. 

Generally are used pure hydrogen as the annealing atmosphere, the atmosphere purity good is more than 99.99%, if another part of the atmosphere is inert gas, the purity can also be a little lower, but can not contain too much oxygen, water vapor.

3. Furnace sealing.

Bright annealing furnace should be closed, isolated from outside air; using hydrogen as a protective gas, only one exhaust port is through (used to ignite the discharge of hydrogen gas). Check the method can be wiped with soapy water in the annealing furnace at each joint gap, to see whether the runaway gas; which easy to runaway gas is the annealing furnace into the place where the tube and out of the tube, the seal in this place is particularly easy to wear, to often check often change.

4. Protective gas pressure. 

In order to prevent micro-leakage, the furnace protective gas should be maintained at a certain positive pressure, if it is hydrogen protective gas, the general requirements of more than 20kBar.

5. Water vapor in the furnace. 

一方面,检查炉料是否干燥,*次装炉时,炉料必须干燥;二、进炉的不锈钢管内是否残留过多的水渍,特别是管子上面有孔的情况下,千万不要漏水,否则整个炉内气氛都被破坏了。


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