55世纪对于济南彩钢瓦C型钢大家都不陌生，说的简单些就是看起来形状像英文字母中的“C”的一种冷弯型钢，但是这其中又分为了冷轧和热C型钢。这也是成型的两种方式。另外C型钢的成型方式还可以分为：镀锌、热镀锌、打孔等等。这些成型方式究竟有什么不同和相同点呢?

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?

55世纪热轧和冷轧都是型钢或钢板成型的工序它们对钢材的组织和性能有很大的影响钢的轧制主要以热轧为主冷轧只用于生产小号型钢和薄板。

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.

济南彩钢瓦C型钢

Jinan color steel tile C-beam

55世纪冷轧C型钢就是指在常温下经过冷弯、冷拉等等一系列的冷加工把带钢加工成的。经过这种方式成型的钢虽然没有经过热态塑性压缩，但是它的截面内仍然存在着或多或少的残余应力，这对C型钢的弯曲特性会造成一定的影响。然而热轧C型钢是经热轧成型的内部会出项分层现象，这大大地削弱了受拉的能力，更为严重的是可能会出现层间撕裂的后果，这是非常危险的。并且热轧C型钢也存在着残余应力，不过这是由于不均匀冷却造成的残余应力，在外力的作用下，变形、稳定性以及抗疲劳等性能都会出现问题，这些在某种程度上来说，都是比较危险的。

55世纪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.

55世纪热轧可以破坏钢锭的铸造组织细化钢材的晶粒并消除显微组织的缺陷从而使钢材组织密实力学性能有所改善。这种改善主要体现在沿轧制方向上从而使钢材在一定程度上不再是各向同性体，浇注时形成的气泡、裂纹和疏松也可在高温和压力作用下被焊合。而冷轧则成型速度快、产量高且不损伤涂层可以做成多种多样的截面形式以适应使用条件的需要，冷轧可以使钢材产生很大的塑性变形从而提高了钢材的屈服点。

55世纪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.

55世纪主要的区别就是1、冷轧成型钢允许截面出现局部屈曲从而可以充分利用杆件屈曲后的承载力，而热轧型钢不允许截面发生局部屈曲。2、热轧型钢和冷轧型钢残余应力产生的原因不同所以截面上的分布也有很大差异。

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.

国内建筑钢材市场价格继续维持下滑走势，但整体市场与前两周相比出现了较为明显的变化。大部分地区建筑钢材价格继续回落，回落幅度在20-70元吨价，下同之间，个别地区跌幅达到了100元。但螺纹钢期货市场价格出现了久违的大幅反弹，明显遏制了现货的下跌势头。

55世纪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.

国内股市、期货市场大幅反弹，现货市场价格下跌势头明显减缓，市场信心有所恢复，此种情况下，价格继续大幅走低的可能性在降低，但在需求相对较弱、未形成统一看涨氛围、中间交易难以明显活跃的情况下价格也难有明显上涨，预计本周国内钢材市场价格将以小幅波动为主。

55世纪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.

济南彩钢瓦C型钢

Jinan color steel tile C-beam