钢结构工程的防火涂料的预算到底能不能省。
Whether the budget of fireproof coating for steel structural engineering can be saved.
1.首先了解一下钢结构在火灾环境下的力学性能。普通的结构钢在200到300度之间会颜色发蓝，并且脆性增加，这也叫蓝脆现象，就类似玻璃或者生铁一样，非常容易阳雕刻 手套生产设备 果树反光膜 北京纯水设备 保定网站制作 排水槽模具破碎。400度的时候，钢材强度开始大幅度下降，而到600度的时候，钢材进入塑性状态，强度和普通的铁丝相差不大，已经不能承载，基本丧失了强度和刚度。
Firstly, understand the mechanical properties of steel structures in fire environments. Ordinary structural steel will turn blue in color between 200 and 300 degrees, and its brittleness will increase. This is also known as blue brittleness, similar to glass or pig iron, which is very easy to break. At 400 degrees Celsius, the strength of the steel begins to significantly decrease, but at 600 degrees Celsius, the steel enters a plastic state, with little difference in strength compared to ordinary iron wire, and can no longer bear the load, basically losing its strength and stiffness.
2.一旦火灾发生，会使火源周边的空气迅速上升到1000度，距离火源位置比较近的钢柱温度上升到600度，可能也就15到20分钟的时间。
Once a fire occurs, the air around the fire source will rapidly rise to 1000 degrees Celsius, and the temperature of the steel column near the fire source may rise to 600 degrees Celsius, which may take 15 to 20 minutes.
3.钢结构本身导热特别快，局部的火灾会很快导致整个建筑物的高温。太短的耐火时间，非常有可能出现正在救援，建筑物突然整体坍塌的情况。
3. The steel structure itself conducts heat very quickly, and local fires can quickly lead to high temperatures throughout the entire building. If the fire resistance time is too short, there is a high possibility of a sudden overall collapse of the building during rescue.
4.防火涂料的作用就是隔绝热量的传递，控制钢结构温度升高，也就类似于给钢结构穿上一件防火服，延长整个钢结构工程的耐火时间，等待救援。
4. The function of the fireproof coating is to isolate the heat transfer and control the temperature rise of the steel structure, which is similar to wearing a fireproof suit on the steel structure to extend the fire resistance time of the entire steel structural engineering and wait for rescue.