問：冷拉方鋼的冷拉工藝是否有不同分類？

Q: Are there different classifications for the cold drawing process of cold drawn square steel?

答：冷拉方鋼的冷拉工藝，是有不同分類的，具體來講，在冷拉時，只用冷拉率或冷拉應(yīng)力來控制的話，是為單控，而這兩個同時進行，是為雙控。而且，要知道的是，如果是預(yù)應(yīng)力鋼筋的冷拉，則應(yīng)采用雙控，這樣比較好。

A:The cold drawing process of cold drawn square steel has different classifications. Specifically, when cold drawing is only controlled by the cold drawing rate or cold drawing stress, it is a single control, and the two are performed simultaneously. Is for dual control . Moreover, it must be known that if it is a cold drawing of prestressed steel bars, dual control should be used, which is better.

問：怎么知道圖紙上標注的是冷拉方鋼還是熱軋方鋼？以及結(jié)構(gòu)用冷拉方鋼的分類，應(yīng)參考哪一標準？

Q: How do I know if the drawing is cold drawn or hot rolled? And the classification of cold drawn square steel for structure, which standard should be referred to?

答：對于問題一，一般來講，如果是沒有說明的，是為熱軋方鋼，有說明的，則是冷拉方鋼。如果，還有不懂的話，還可以查閱五金手冊。至于，結(jié)構(gòu)用冷拉方鋼，在分類上的參考標準，是為《GB/T 3078-2008 優(yōu)質(zhì)結(jié)構(gòu)鋼冷拉鋼材》這一個。

Answer: For question one, in general, if there is no description, it is hot-rolled square steel, and if there is a description, it is cold drawn square steel. If you still don't understand, you can also refer to the hardware manual. As for the cold drawn square steel for structural use, the reference standard for classification is "GB / T 3078-2008 High Quality Structural Steel Cold Drawn Steel".

問：冷拉方鋼在使用過程中如果出現(xiàn)摔斷或者折斷，根本原因是什么？

Q: If the cold drawn square steel is broken or broken during use, what is the root cause?

答：冷拉方鋼在使用過程中如果出現(xiàn)摔斷或者折斷，其根本原因，是該冷拉方鋼所使用的原材料有問題，比如，原材料中雜質(zhì)過多，這時，材料再進行冷拉的話，那么是會出現(xiàn)斷裂現(xiàn)象的。

A: If the cold drawn square steel breaks or breaks during use, the root cause is that there is a problem with the raw materials used in the cold drawn square steel, for example, there are too many impurities in the raw material. At this time, the material is cold drawn. If so, then there will be fractures.