钢纤维的制造方法

Method for manufacturing steel fiber

⒈钢丝切断法

The wire cut off

这种加工方法比较简单，一般利用小直径0.4-0.8mm的冷拔钢丝为原料，’按照规定的长度把钢丝切成短纤维。用这种方法生产钢纤维的抗拉强度，远高于其它方法加工成的钢纤维，可达1000-2000MPa.

This method of processing is relatively simple, generally use small diameter 0.4-0.8mm cold drawn steel wire as raw material, "in accordance with the required length of steel wire into short fiber.". The tensile strength of steel fibers produced by this method is much higher than that of steel fibers processed by other methods, up to 1000-2000MPa.

加工手段可以用切刀、冲床。为了提高效率，常用旋转刀具切断。由于冷拔钢丝价格昂贵，这种方法生产的钢纤维成本较高。此法生产钢纤维的另一缺点是表面较光滑，与混凝土等基体的粘结强度较小。为了增加钢纤维与混凝土等基体的粘结强度，常常采用改变钢纤维的外形，即通过生产异形钢纤维的办法加以解决，常见的方法有三种：

Cutting tools can be made with cutters and presses. In order to improve efficiency, rotary cutters are often used to cut off. Because of the high price of cold drawn steel wire, the cost of steel fiber produced by this method is higher. The other disadvantage of this method is that the surface is smooth and the bonding strength of the matrix is smaller than that of concrete. In order to increase the bond strength of steel fiber and concrete matrix, the shape of steel fiber is often changed, that is to say, through the production of special-shaped steel fiber, there are three common methods:

⑴压棱法：在切断钢丝前，用进给钢丝的夹送辊在钢丝上

The rib method: in steel wire cutting, wire feed with pinch roller on the wire

压出棱形凹坑。

Press the prismatic pit.

⑵波形法：在切断钢丝前，用进给钢丝的夹送辊将钢丝压

The waveform method: in steel wire cutting, wire clamp roller with wire feeding

成波形后再切断。

Cut into waveform before cutting.

⑶弯钩法：在切断钢丝前，用进给钢丝的夹送辊等距离地压出弯钩状再切断

The hook method: in steel wire cutting, with roller press out the distance and then cut off the hook shaped clip wire feed

2.薄板剪切法

2. plate shearing method

薄板剪切法是吧冷轧薄钢板切成钢纤维的方法，剪切前用特制的小型纵剪机将薄冷轧卷板剪成带钢卷，带钢卷的宽度和钢纤维的长度相同，然后将带钢卷连续不断地送入旋转刀具或普通冲床切断，旋转刀具的轴与薄板进给方向互相垂直。原材料一般采用退火的冷轧钢板，为提高强度也可以使用未退火的冷轧钢板。

Shear plate method is: cold rolled steel sheet into steel fiber, shear with small longitudinal shear special thin cold-rolled coil cut strip, strip width and steel fibre of the same length, then strip continuously into a rotary tool or ordinary punch cutting, rotary cutter shaft and plate feed direction perpendicular to each other. Raw materials are generally annealed cold-rolled steel plate, in order to improve the strength, can also be used cold-rolled cold-rolled steel plate.

⒊厚板切削法

3 plate cutting method

所用原材料为厚钢板或钢锭，用旋转的平刃铁刀进行切削制成的钢纤维.切削时，钢纤维将产生很的塑性变形，轴间发生扭曲，可以增大与混凝土等基体的粘结力。若以普通低碳钢为原材料时，切削成的钢纤维经加工硬化后，其弧度约为母材的两倍半，成为一种高强度、高硬度的钢纤维。

The raw materials used for thick steel plate or steel ingot, steel fiber cutting made with flat blade. When the cutting knife rotating iron, steel fiber will produce plastic deformation is the shaft twist, can increase bonding force and concrete matrix. If ordinary low carbon steel is used as raw material, the steel fiber which is cut will be about two and a half times as long as the base metal, and become a kind of steel fiber with high strength and hardness.