混凝土增强材料用钢纤维 446#不锈钢钢纤维

钢纤维是指用钢材的短纤维，将钢丝切断，并按照规定样式压制成两端弯钩，具有一定强度。钢纤维主要用于制造钢纤维混凝土，并应用于隧道、工业地坪等领域。446#是钢纤维的一种牌号，以4字开头，除开446之外，以4字开头的还有430等；凡是以4字开头的钢纤维，都是不锈钢纤维，因为它们有一个共同的特点，就是含有铬(Cr)。4字头钢纤维都含有耐蚀性贵金属：铬（Cr），因为Cr的强耐蚀性，所以广泛被用于冶金行业，耐材行业，化工行业，被广泛的钢厂，冶金厂和化工厂所用。比如，钢厂的钢水槽，电极，冶金厂的炉壁，炉门，炉顶封盖等。

1、按外形划分有：平直形钢纤维、压棱形钢纤维、波形钢纤维、弯钩形钢纤维、大头形钢纤维、双尖形钢纤维、集束钢纤维等等。

2、按截面形状划分有：圆形、矩形、槽型、不规则性。

3、按生产工艺划分有：切断钢纤维(用细钢丝切断)；剪切钢纤维(用薄钢板、带钢剪切)；铣削型钢纤维(用厚钢板或钢锭切削)；熔抽钢纤维(用熔融钢水抽制)。 有前途的是溶抽钢纤维， 低。

4、按材质划分有：普碳钢纤维(抗拉强度一般在3002500MPa)；不锈钢纤维(按材质有304、310、330、430、446等)；其他金属纤维(铝纤维、铜纤维、钛纤维以及合金纤维)。

5、按表面涂覆状态划分有：无涂覆层，表面涂环氧树脂，镀锌等。工业上大量使用的是无涂覆层的普通钢纤维。

6、按施工工艺分类有：喷射用、浇注用。

7、按直径尺寸分类有：普通钢纤维(直径d>0.08mm)；超细钢纤维(直径d0.08mm)；超细钢纤维主要用于增强塑料及 摩擦材料。

1、工艺流程短，价格便宜；

2、快淬工艺使钢纤维具有微晶结构，强度和韧性高；

3、纤维的横截面呈不规则月牙形，表面自然粗糙，与耐火料基体结合力强；

4、有良好的高温强度和高温耐腐蚀性。

钢纤维主要用于制造钢纤维混凝土，任何方法生产的钢纤维都能起到强化混凝土的作用。纤维的增 果主要取决于基体强度(fm)，纤维的长径比(钢纤维长度l与直径d的比值，即I/d)，纤维的体积率(钢纤维混凝土中钢纤维所占体积百分数)，纤维与基体间的粘结强度(τ)，以及纤维在基体中的分布和取向(η)的影响。当钢纤维混凝土破坏时，大都是纤维被拔出而不是被拉断，因此改善纤维与基体间的粘结强度是改善纤维增 果的主要控制因素之一。加入钢纤维的混凝土其抗压强度、拉伸强度、抗弯强度、冲击强度、韧性、冲击韧性等性能均得到较大提高。

Steel fiber refers to the short steel fiber, cutting the wire, and hook on both ends of the style compressed into in accordance with the relevant provisions, has certain strength.Steel fiber is mainly used in the manufacture of steel fiber reinforced concrete and application in the tunnel, industrial floor, etc.446 # steel fiber is a kind of brand, starting with four words, apart from 446, with four words beginning with 430;All begin with four words of steel fiber, is a stainless steel fiber, because they have a common characteristic, is containing chromium (Cr).4 "contain the corrosion resistance of steel fiber for precious metals: chromium (Cr), because of strong corrosion resistance of Cr, so widely used in metallurgical industry, refractory material industry, chemical industry, widely steel mills, used by metallurgical plant and chemical plant.Steel mill of steel water tank, for example, electrodes, metallurgy factory of furnace wall, furnace door, roof block, etc.
Steel fiber advantages
1, short technological process, the price is cheap;
2, rapid quenching technology make just fiber with microcrystalline structure, high strength and toughness;
3, the fiber cross section shows irregular crescent, natural rough surface, and refractory material substrate;
4, good high temperature strength and high temperature corrosion resistance.
Steel fiber USES
Steel fiber is mainly used in the manufacture of steel fiber reinforced concrete, any method in the production of steel fiber can have the effect of reinforced concrete.Fiber reinforced effect mainly depends on the matrix strength (FM), fiber length to diameter ratio (the ratio of steel fiber length l and diameter d, the I/d), fiber volume fraction (steel fiber volume percent) of steel fiber reinforced concrete, the bond strength between the fiber and matrix (tau), as well as the distribution and orientation of fibers in the matrix (eta).When steel fiber reinforced concrete damage, mostly fiber was uprooted instead of being pulled, so improving the bond strength between the fiber and matrix is one of the main control factors to improve the effect of fiber reinforced.Join the compressive strength of steel fiber concrete, the tensile strength, bending strength, impact strength, toughness, impact toughness and other properties were improved greatly.

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