1、冷拉型鋼的冷拉工藝是否在常溫下進行的？

1. Is the cold drawing process of cold drawn section steel performed at normal temperature?

冷拉型鋼的冷拉工藝是在常溫下進行的。通過這一操作，還可以來使材料發(fā)生塑性變形，從而提高它的屈服點強度。

The cold drawing process of cold drawn section steel is performed at normal temperature. Moreover, through this operation, the material can be plastically deformed, thereby increasing its yield point strength.

2、冷拉型鋼中的冷拉圓鋼，是否能夠進行折彎處理？

2. Can cold-drawn round bars in cold-drawn sections be bent?

冷拉型鋼中的冷拉圓鋼是可以進行折彎的，因為冷拉圓鋼沒有超過材料的極限強度。所以冷拉圓鋼是可以折彎的。

The cold drawn round steel in the cold drawn steel can be bent because the cold drawn round steel does not exceed the ultimate strength of the material. Therefore, cold drawn round steel can be bent.

3、冷拉型鋼如果出現(xiàn)開裂現(xiàn)象的話，是有哪些具體原因所導致的？

3. If there are cracks in cold-drawn section steel, what are the specific reasons?

在冷拉型鋼上,如果所使用的材料質(zhì)量不合格或不達標的話，或者含有雜質(zhì)，或是雜質(zhì)含量過大。那么，對其進行加工的話，加工而成的冷拉型鋼，在材料硬度上會有所增加，所以容易出現(xiàn)開裂等問題。

On cold drawn steel, if the quality of the materials used is unqualified or does not meet the standards, or it contains impurities, or the content of impurities is too large. Then, if it is processed, the processed cold-drawn steel will increase the hardness of the material, so it is prone to problems such as cracking.

4、冷拉型鋼表面為什么會變硬？

4. Why does the surface of cold-drawn steel become hard?

因為冷拉型鋼在冷拉過程中，表面會形成馬氏體，而且，再加上塑性變形，從而導致位錯線的密度增加，由于相互制約，限制了其進一步運動。導致了冷拉型鋼表面的硬度增加。

Because cold-drawn steel forms martensite on the surface during cold-drawing, and coupled with plastic deformation, the density of dislocation lines increases, which restricts its further movement due to mutual restrictions. This results in an increase in the hardness of the surface of the cold-drawn section steel.