日韩av在线高清免费毛片日韩欧美一级成人|女人18以后毛片|国产18女人毛多水多毛片|乱系列人妻视频|中文字幕久久熟女人妻av|91麻豆人妻|校花被我玩弄|父女乱荡|高潮videossex潮喷另类|日本在线观看人妻,黑人侵犯日本人妻,色哟哟视频线在线播放欧美,亚洲欧美国产国产一区第二页

鄭州玉發(fā)磨料有限公司生產(chǎn)的剛玉磨料YF2A是以工業(yè)氧化鋁為主要原料，配加適量的復(fù)合添加劑,，經(jīng)高溫熔煉而成,。該產(chǎn)品既具有白剛玉磨料的鋒利，又具備棕剛玉,、鉻剛玉磨料的韌性,。用于樹脂砂輪、涂覆磨具的制備,，性能可與藍(lán)色剛玉和藍(lán)單媲美,。適用于特種鋼的切割和磨削，特別是用于干磨和易變形易燒傷工件的磨削加工,?？刹捎酶鞣N結(jié)合劑。

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.

鄭州玉發(fā)磨料有限公司生產(chǎn)的剛玉磨料YF2A系列產(chǎn)品呈淺黃色（如圖），各項(xiàng)理化指標(biāo)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:

化學(xué)成份 Chemical composition:

            Al2O3 ＞99%    Na2O＜0.40%  

SiO2＜0.20%    Fe2O3＜0.10%

粒度組成: 符合GB2477-2008標(biāo)準(zhǔn)

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

典型試驗(yàn)：Typical test

一  切割試驗(yàn) cutting test

（1）采用該產(chǎn)品,、整形棕剛玉,、球磨棕剛玉、對(duì)輥?zhàn)貏傆穹謩e制備成

φ105*1mm切割片,，在切割304不銹鋼φ12棒材試驗(yàn),，結(jié)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和藍(lán)色單晶剛玉分別105*1mm切割片，切割304不銹鋼φ12棒材,，對(duì)比試驗(yàn)結(jié)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  磨削試驗(yàn)grinding test

鉻剛玉,，YF2A兩者都用46＃砂制平面磨砂輪，進(jìn)行磨削45＃鋼,、40 Cr鋼的對(duì)比試驗(yàn),，結(jié)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.