For the nodular cast iron grate itself, the influence is not great under the temperature. That is because the ductile iron grate has good toughness, steel strength and good elongation, which makes the ductile iron grate work well at low temperature in winter.
However, the cracking of nodular cast iron grate is inevitable. If you want to prevent it, it mainly depends on the fluid medium in the nodular cast iron grate. If the critical point of the fluid is relatively low, you can prevent the cracking at a lower temperature in winter by properly adding antifreeze or properly insulating the nodular cast iron grate.
Another measure can also reduce the cracking probability of nodular cast iron grate in winter, that is to select materials with better low temperature and frost resistance to make nodular cast iron grate. And higher technical measures are needed in the production, so that it can work well at low temperature.
However, the majority of users should pay attention to the fact that the cost of nodular cast iron grate with low temperature is very expensive, so its price is also higher than that of ordinary grate. Then it is compared with gray cast iron.
Taking the casting pulley as an example, gray cast iron will be used more, because the yield of nodular cast iron grate products is not as high as gray iron, and the subsequent processing is also more difficult than gray iron. During the production of nodular cast iron grate, some holes are often found after heat treatment, shot blasting or machining, which seriously affects the quality of products. Gray cast iron is very suitable for casting pulley because of its good casting performance, vibration damping, cutting performance and low notch sensitivity.
The above is the problem that Xiaobian brought to you about the prevention of explosion when using nodular cast iron grate in winter. You should pay attention to regular maintenance when using nodular cast iron grate. No matter how good the nodular cast iron grate is not maintained, it will not play a corresponding role and its service life will not be prolonged.