High grade hot- rolled strip

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Hot rolled strip, the English name of Hot - rolled strip, also known as Hot rolled steel belt, commonly known as is a Hot plate. Hot rolled strip width less than or equal to 600 mm, the thickness of 0.35-200 - mm steel plate and the thickness of 1.2-25 mm steel belt.

The relevant classification

The editor


Hot rolled steel plate is divided into structural steel, mild steel, welding steel, then according to the steel of various steel products to find what you need to check the specific density and composition of the steel. Hot rolled steel plate hardness is low, easy processing, good extensibility. Hot rolled strip steel products including steel belt (volume) and has its shear of steel plate. Steel belt (volume) can be divided into straight hair volume and finishing (volume classification, formation and slitting roll).

Hot rolled steel plate strength is relatively low, the surface quality almost (oxidation, low roughness), but the plasticity is good, generally for the medium plate, manufacture, high strength, high hardness, high surface finish, generally for sheet, can be used as a drawing board.

2 the difference between

The editor


Cold rolled steel sheet due to a certain degree of strain hardening, toughness is low, but can reach better showed, used for cold bending spring pieces and parts, at the same time due to the yield point is close to the tensile strength, so no foresight to danger, in use process in the load exceeds allowable load are prone to accidents.

1) cold plate using cold processing surface without scale, good quality. Hot rolled steel plate, surface of oxide skin are processed using the hot rolled plate thickness with the poor.

2) hot rolled steel toughness and surface smoothness is poor, the price is low, and the extension of manufacture and resilient, but the price is more expensive.

3) rolling is divided into cold rolled and hot rolled steel plate, distinguish between point for recrystallization temperature.

4) cold rolling: generally used in the production of strip cold rolling, the rolling speed is higher. The temperature of the hot rolled steel plate, the temperature of the hot rolled and forged close.

5) don't plating surface of hot rolled steel plate into dark brown, not plated cold plate surface is gray, from the smooth degree of surface after plating will distinguish, lengzha board smoothness is higher than that of hot rolled steel plate.

Data reference

标准及牌号
国家标准

相当国外标准

作用与用途
材料类别
执行标准
牌号
标准号
牌号
适应于制造冷成型加工的零件
低碳钢卷板
Q/BQB302
SPHC
JISG3131
SPHC
SPHD
SPHD
SPHE
SPHE
SAE1006/SAE1008

SAE1006/SAE1008
XG180IF/200IF
XG180IF/200IF
一般结构用钢
GB/T912-1989
Q195
JISG3101
SS330
用于建筑、桥梁、船舶、车辆等一般构建
Q235B
SS400
SS400
SS490
ASTMA36
SS540





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Q:How does the disc shear deal with the problem of side clips into the strip?
The disc shearing machine is a production line made up of uncoiling, feeding, shearing and coiling
Q:What is the hardness of cold rolled steel strip?
Generally, the Rockwell hardness of annealed carbon steel is 55+-3, and the hardness of annealed cold rolled strip is above 80
Q:What's the difference between cold rolled strip and cold rolled strip?
Cold roll is usually called hard roll, due to continuous deformation caused by cold hardening the volume rolling hard strength, hardness, toughness index rise decline, so the stamping performance will deteriorate, only for a simple deformation of parts.
Q:Is the strip steel strip?
Including strip steel, generally speaking, the strip refers to the plate and strip of the general term, but the plate in the middle part of the plate and the delivery of sheet metal is cut from the strip.
Q:What's the meaning of "double light" in strip cold rolling?
Strip strip coiling: general supply, with high dimensional accuracy, good surface quality, easy processing, material saving and other advantages. With the same steel plate, strip by strip material is divided into ordinary and high quality strip two; according to the processing method of cold rolled strip steel hot strip, two.
Q:Causes of zinc removal in hot rolled strip
The residual impurity particles on the substrate surface are not removed before immersion into the zinc pot, which affects the adhesion of the zinc layer.
Q:Why does the strip bend when it is rolled?
In the rolling process of strip tension is too large or too small will bring many adverse effects on the operation, including in the choice of a plan, must be properly chosen at each strip tension, if the improper selection of strip tension, will affect the quality of strip steel and the actual operation, when the strip coiler tension before and after the selection is too large that will cause the broken belt or rolled steel coil is heart-shaped, tension is too small will cause damage to roll off with Le roll or strip.
Q:How to distinguish cold strip steel and cold rolled silicon steel sheet by simple and practical methods
A little further, to buy a measuring instrument of iron loss, the general cold strip can replace the silicon steel sheet, especially low grade such as 1300 and so on, the loss reached 13, low demand can be used instead of cold rolled strip steel production, little more.
Q:What is strip steel?
Compared with steel plate, it has the advantages of high dimensional accuracy, good surface quality and easy to use. Widely used in the production of welded steel pipe, cold formed steel billet, used for the manufacture of bicycle frame, wheel, clamp, gasket, spring, cable armored, saw blade, blade, packing iron sheet and so on.
Q:Can the tension leveller eliminate the wave shape of strip steel completely?
Reflecting the shape of the board, the wave height is reduced or the wavelength is lengthened. That is, the tension straightener can only reduce the wave and improve the shape of the plate, but can not fundamentally eliminate the wave, and get an ideal smooth strip steel. There is an old saying called "correction must be positive". That is to completely eliminate the wave must be of short fiber than long fiber tension and bending is greater, elastic and plastic deformation of the original long fiber length is greater than a certain amount, resulting in the removal of external force, elastic recovery, length of fiber length, so as to obtain the shape completely flat the. However, in the current conditions of the straightening machine equipment, do not have such a function.

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