對于濟南彩鋼瓦C型鋼大家都不陌生，說的簡單些就是看起來形狀像英文字母中的“C”的一種冷彎型鋼，但是這其中又分為了冷軋和熱C型鋼。這也是成型的兩種方式。另外C型鋼的成型方式還可以分為：鍍鋅、熱鍍鋅、打孔等等。這些成型方式究竟有什么不同和相同點呢?

Jinan color steel tile for C-beam we are not unfamiliar with, said simply that looks like the shape of the English letter in the "C" of a cold-formed steel, but which is divided into cold-rolled and hot C-beam. These are also two ways of forming. In addition, the forming methods of C-beam can be divided into: galvanizing, hot galvanizing, drilling and so on. What are the differences and similarities between these molding methods?

熱軋和冷軋都是型鋼或鋼板成型的工序它們對鋼材的組織和性能有很大的影響鋼的軋制主要以熱軋為主冷軋只用于生產(chǎn)小號型鋼和薄板。

Both hot rolling and cold rolling are the forming processes of section steel or steel plate, which have a great influence on the microstructure and properties of steel. The rolling of steel is mainly hot rolling, and cold rolling is only used to produce small section steel and thin plate.

濟南彩鋼瓦C型鋼

Jinan color steel tile C-beam

冷軋C型鋼就是指在常溫下經(jīng)過冷彎、冷拉等等一系列的冷加工把帶鋼加工成的。經(jīng)過這種方式成型的鋼雖然沒有經(jīng)過熱態(tài)塑性壓縮，但是它的截面內(nèi)仍然存在著或多或少的殘余應力，這對C型鋼的彎曲特性會造成一定的影響。然而熱軋C型鋼是經(jīng)熱軋成型的內(nèi)部會出項分層現(xiàn)象，這大大地削弱了受拉的能力，更為嚴重的是可能會出現(xiàn)層間撕裂的后果，這是非常危險的。并且熱軋C型鋼也存在著殘余應力，不過這是由于不均勻冷卻造成的殘余應力，在外力的作用下，變形、穩(wěn)定性以及抗疲勞等性能都會出現(xiàn)問題，這些在某種程度上來說，都是比較危險的。

Cold rolled C-beam refers to the cold-rolled strip processed by cold bending, cold drawing and a series of cold processing at room temperature. Although the steel formed in this way has not undergone hot plastic compression, there are still more or less residual stresses in its section, which will have a certain impact on the bending characteristics of C-beam. However, the hot-rolled C-beam is formed by hot rolling, and the internal delamination phenomenon will appear, which greatly weakens the tensile capacity. What's more serious is that the interlaminar tearing may occur, which is very dangerous. And hot rolled C-beam also has residual stress, but this is due to the residual stress caused by uneven cooling. Under the action of external force, deformation, stability and anti fatigue properties will appear problems. To some extent, these are more dangerous.

熱軋可以破壞鋼錠的鑄造組織細化鋼材的晶粒并消除顯微組織的缺陷從而使鋼材組織密實力學性能有所改善。這種改善主要體現(xiàn)在沿軋制方向上從而使鋼材在一定程度上不再是各向同性體，澆注時形成的氣泡、裂紋和疏松也可在高溫和壓力作用下被焊合。而冷軋則成型速度快、產(chǎn)量高且不損傷涂層可以做成多種多樣的截面形式以適應使用條件的需要，冷軋可以使鋼材產(chǎn)生很大的塑性變形從而提高了鋼材的屈服點。

Hot rolling can destroy the casting structure of ingot, refine the grain of steel and eliminate the defects of microstructure, so that the microstructure of steel is dense and the mechanical properties are improved. This improvement is mainly reflected in the rolling direction, so that the steel is no longer isotropic to a certain extent, and the bubbles, cracks and porosity formed during pouring can also be welded under the action of high temperature and pressure. Cold rolling has the advantages of fast forming speed, high yield and no damage to the coating. It can be made into a variety of cross-section forms to meet the needs of service conditions. Cold rolling can cause great plastic deformation of steel and improve the yield point of steel.

主要的區(qū)別就是1、冷軋成型鋼允許截面出現(xiàn)局部屈曲從而可以充分利用桿件屈曲后的承載力，而熱軋型鋼不允許截面發(fā)生局部屈曲。2、熱軋型鋼和冷軋型鋼殘余應力產(chǎn)生的原因不同所以截面上的分布也有很大差異。

The main differences are: 1. Local buckling of section is allowed for cold-rolled formed steel, which can make full use of the bearing capacity after buckling, while local buckling of section is not allowed for hot-rolled steel. 2. The reason of producing residual stress is different between hot rolled section and cold rolled section, so the distribution of residual stress on section is also different.

國內(nèi)建筑鋼材市場價格繼續(xù)維持下滑走勢，但整體市場與前兩周相比出現(xiàn)了較為明顯的變化。大部分地區(qū)建筑鋼材價格繼續(xù)回落，回落幅度在20-70元噸價，下同之間，個別地區(qū)跌幅達到了100元。但螺紋鋼期貨市場價格出現(xiàn)了久違的大幅反彈，明顯遏制了現(xiàn)貨的下跌勢頭。

Domestic construction steel market prices continue to maintain a downward trend, but the overall market compared with the previous two weeks appeared more obvious changes. The price of construction steel continued to fall in most parts of the country, with a drop range of 20-70 yuan per ton, the same below, and a drop of 100 yuan in some areas. However, the price of rebar futures market rebounded sharply, which obviously curbed the downward trend of spot.

國內(nèi)股市、期貨市場大幅反彈，現(xiàn)貨市場價格下跌勢頭明顯減緩，市場信心有所恢復，此種情況下，價格繼續(xù)大幅走低的可能性在降低，但在需求相對較弱、未形成統(tǒng)一看漲氛圍、中間交易難以明顯活躍的情況下價格也難有明顯上漲，預計本周國內(nèi)鋼材市場價格將以小幅波動為主。

The domestic stock market and futures market rebounded sharply, the price decline of the spot market slowed down significantly, and the market confidence recovered. In this case, the possibility of the price continuing to decline significantly is decreasing. However, the price is also difficult to rise significantly when the demand is relatively weak, the unified bullish atmosphere is not formed, and the intermediate trading is difficult to be obviously active. It is expected that the domestic steel market price will rise significantly this week It mainly fluctuates in a small range.

濟南彩鋼瓦C型鋼

Jinan color steel tile C-beam