1、冷扎成型鋼容許橫截面發(fā)生部分彎曲，進(jìn)而充分利用了構(gòu)件彎曲之后的承載能力;而熱軋圓鋼不可以橫截面產(chǎn)生部分彎曲。

1. Cold rolled formed steel allows for partial bending of the cross-section, thereby fully utilizing the load-bearing capacity of the component after bending; Hot rolled round steel cannot produce partial bending of the cross-section.

2、熱扎型鋼和冷扎型鋼剩下地應(yīng)力形成的原因不一樣，因此橫截面里的遍布也有很大差異。冷彎薄壁型鋼橫截面里的剩下溫度分布是彎折型，而熱軋板型鋼或焊接型鋼橫截面上剩下溫度分布是膜型。

2. The reasons for the formation of residual stress in hot-rolled steel and cold-rolled steel are different, so there are also significant differences in the distribution of stress in the cross-section. The remaining temperature distribution in the cross-section of cold-formed thin-walled steel is bending type, while the remaining temperature distribution on the cross-section of hot-rolled plate or welded steel is membrane type.

3、熱扎型鋼的權(quán)利彎曲剛度比冷扎型鋼高，因此熱扎型鋼的抗扭轉(zhuǎn)特性明顯優(yōu)于冷扎型鋼一.熱扎

3. The bending stiffness of hot-rolled steel is higher than that of cold-rolled steel, so the torsional resistance of hot-rolled steel is significantly better than that of cold-rolled steel

優(yōu)勢:可以破壞鑄鋼件的鑄造組織，優(yōu)化鋼板的晶體，并消除金相組織的不足，從而使得建筑鋼材機(jī)構(gòu)密實(shí)度，物理性能有所改善。這些改進(jìn)關(guān)鍵表述在沿軋制方向上，從而使得建筑鋼材在一定程度上再也不是各向異性體;澆筑時(shí)所形成的汽泡、裂紋和松散，還可在高溫環(huán)境壓力作用下被焊合。

Advantages: It can destroy the casting structure of steel castings, optimize the crystal structure of steel plates, and eliminate the shortcomings of metallographic structure, thereby improving the compactness and physical properties of building steel structures. These key improvements are expressed along the rolling direction, so that construction steel is no longer anisotropic to a certain extent; The bubbles, cracks, and looseness formed during pouring can also be welded under high temperature and pressure.

缺陷:1.通過熱扎以后，建筑鋼材內(nèi)部非金屬夾雜(通常是硫酸鹽和金屬氧化物，也有鋁硅酸鹽)被卷成片狀，發(fā)生分層次(隔層)狀況。分段使材料沿壁厚方位受彎性能大大的惡變，而且可能會(huì)在焊接收縮時(shí)發(fā)生固層撕破。焊接收攏引發(fā)的部分應(yīng)變力常常抵達(dá)屈服極限應(yīng)變的多倍，比承載力所引起的應(yīng)變力大很多;2.不勻制冷所造成的剩下地應(yīng)力。剩下地應(yīng)力要在并沒有外力的作用下里面自相態(tài)的地應(yīng)力，各種各樣截面的熱扎型鋼都是有這種剩下地應(yīng)力，一-般型鋼斷面尺寸越多，剩下地應(yīng)力也就越大。剩下地應(yīng)力雖是自相態(tài)的，――但是對(duì)鋼結(jié)構(gòu)構(gòu)件在外力的作用中的性能還是有一定影響。比如對(duì)變型、可靠性、緩解疲勞等方面均可能會(huì)產(chǎn)生有害的功效。

Defect: 1. After hot stamping, non-metallic inclusions (usually sulfates and metal oxides, as well as aluminosilicates) inside the building steel are rolled into sheets, resulting in a layered (interlayer) condition. Segmentation greatly deteriorates the bending performance of the material along the wall thickness direction, and may cause tearing of the solid layer during welding shrinkage. The partial strain force caused by welding closure often reaches multiple times the yield limit strain, which is much greater than the strain force caused by bearing capacity; 2. The remaining ground stress caused by uneven cooling. The remaining ground stress needs to be in its own phase without the action of external forces. Various types of hot-rolled steel sections have this kind of remaining ground stress, and the larger the cross-sectional size of a general steel, the greater the remaining ground stress. Although the remaining geostress is self phase, it still has a certain impact on the performance of steel structural components under external forces. For example, it may have harmful effects on deformation, reliability, and fatigue relief.

二..冷扎就是指常溫下，通過冷拔、冷拔、冷拉等冷加工把鋼板或鋼鏈制作成各種各樣型式的建筑鋼材。優(yōu)勢:成形速度更快、產(chǎn)量大，且不損害鍍層，可以制作各種各樣的橫截面方式，以滿足適用范圍的需求;熱軋能使建筑鋼材產(chǎn)生巨大的形狀變化，從而提高鋼板的屈服極限。

2、 Cold drawing refers to the production of various types of building steel from steel plates or steel chains through cold processing such as cold drawing, cold drawing, and cold drawing at room temperature. Advantages: Faster forming speed, larger output, and no damage to the coating. Various cross-sectional methods can be made to meet the requirements of the applicable range; Hot rolling can cause significant shape changes in construction steel, thereby increasing the yield limit of steel plates.

缺陷:1.盡管成形過程中沒有通過溫態(tài)可塑性縮小，但斷面內(nèi)依然存在剩下地應(yīng)力，對(duì)鋼材總體和局部彎曲的特點(diǎn)必定造成影響;

Defects: 1. Although the deformation process did not undergo thermal plasticity reduction, there are still residual stresses in the cross-section, which will inevitably affect the overall and local bending characteristics of the steel;

2.冷扎型鋼款式一般為張口橫截面，促使截面的隨意彎曲剛度比較低。在受彎時(shí)很容易出現(xiàn)扭曲，受力時(shí)很容易出現(xiàn)彎扭屈曲，抗扭轉(zhuǎn)性能較差;

2. Cold rolled steel styles generally have an open cross-section, which reduces the arbitrary bending stiffness of the cross-section. Twisting is prone to occur when subjected to bending, and bending torsion buckling is prone to occur when subjected to force, resulting in poor torsional resistance performance;

3.冷扎成型鋼厚度比較小，在零件銜接的拐角處又沒加厚型，承擔(dān)可逆性的集中荷載的能力差。

3. The thickness of cold rolled formed steel is relatively small, and there is no thickened type at the corners where the parts are connected, resulting in poor ability to bear reversible concentrated loads.