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发明授权
CN105779891B 一种用于刹车片的高硬度摩擦块的制备方法 有权

一种用于刹车片的高硬度摩擦块的制备方法
摘要：
本发明公开了一种用于刹车片的高硬度摩擦块的制备方法，包括如下步骤：将原料在氩气气氛中升温至熔融状态，然后真空保温得到物料a；将物料a出炉进行浇注，冷却至400～500℃，进行表面机加工得到物料b；将物料b升温至T1℃进行奥氏体化，然后保温3～4h，取出置于温度为220～230℃的硝盐浴中，升温至T2℃，保温4～5h得到用于刹车片的高硬度摩擦块；其中T1＝1100+K1×240×100×(nC+nW+nZr)/28.7，T2＝345+K2×100×(nC+nW+nZr)，K1的值为5～8，K2的值为28～30，nC、nW、nZr分别表示碳元素、钨元素和锆元素在物料a中所占重量百分比。
摘要（英）：

The invention discloses a preparation method for a high-hardness friction block for a brake pad. The preparation method comprises the following steps of raising the temperature of raw materials in the argon atmosphere until a molten state, and then carrying out vacuum heat preservation to obtain a material a; discharging the material a, pouring, cooling to 400-500 DEG C, and carrying out surface machining to obtain a material b; raising the temperature of the material b to T1 DEG C, austenitizing, then carrying out heat preservation for 3-4h, taking out, putting in a nitrate bath with the temperature to be 220-230 DEG C, raising the temperature to T2 DEG C, and carrying out heat preservation for 4-5h to obtain the high-hardness friction block for the brake pad, wherein T1=1100+K1x240x110x(nC+nW+nZr)/28.7, T2=345+K2x100x(nC+nW+nZr), a value of K1 is 5-8, a value of K2 is 28-30, and nC, nW and nZr express the weight percentages of carbon element, tungsten element and zirconium element occupied in the material a respectively.

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