郑州玉发磨料有限公司生产的刚玉磨料YF2A是以工业氧化铝为主要原料，配加适量的复合添加剂，经高温熔炼而成。该产品既具有白刚玉磨料的锋利，又具备棕刚玉、铬刚玉磨料的韧性。用于树脂砂轮、涂覆磨具的制备，性能可与蓝色刚玉和蓝单媲美。适用于特种钢的切割和磨削，特别是用于干磨和易变形易烧伤工件的磨削加工。可采用各种结合剂。

The corundum abrasives， YF2A series products of Zhengzhou Yufa Abrasive Co., Ltd. ，are produced using industrial alumina as the main raw material, adding composite additives, and melting at high temperatures. The products possess properties of both good sharpness equal to white corundum and high toughness to brown corundum or chrome corundum . They can be used as raw material when making resin abrasive disks and coated milling tools, and the properties of the products are completely comparable to the blue corundum and blue monocrystal corundum. The products can be used for cutting and grinding special steel ,especially for dry-grinding and making workpieces which are easy-out-of-shape and easy getting burnt. All kinds of binders can be adopted when utilizing YF2A to make grinding tools.

郑州玉发磨料有限公司生产的刚玉磨料YF2A系列产品呈浅黄色（如图），各项理化指标如下：

The color of the YF2A series corundum abrasives produced by Yufa is light yellow  (see the image below). The product indice are as follows:

化学成份 Chemical composition:

            Al2O3 ＞99%    Na2O＜0.40%  

SiO2＜0.20%    Fe2O3＜0.10%

粒度组成: 符合GB2477-2008标准

Particle size :  in accordance of the specifications of GB2477-2008.

典型试验：Typical test

一  切割试验 cutting test

（1）采用该产品、整形棕刚玉、球磨棕刚玉、对辊棕刚玉分别制备成

φ105*1mm切割片，在切割304不锈钢φ12棒材试验，结果如下。

Use YF2A, shaped brown corundum, ball-milled brown corundum and roller- milled brown corundum respectively to make Cutting disks in size of φ105*1mm,  and then cut φ12 bars of stainless steel 304 with the prepared disks. The results are as follows.

（2）采用YF2A和蓝色单晶刚玉分别105*1mm切割片，切割304不锈钢φ12棒材，对比试验结果如下：

Use YF2A and blue monocrystal corundum respectively to make Cutting disks in size of φ105*1mm, then cut the φ12 bars of stainless steel 304. The results are as follows.

二  磨削试验grinding test

铬刚玉，YF2A两者都用46＃砂制平面磨砂轮，进行磨削45＃钢、40 Cr钢的对比试验，结果如下：

46＃Sand plane grinding wheels used chrome corundum and YF2A, respectively to mill 45＃steel and 40 Cr steel. The results are as follows.