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现在常用的高速钢有W6Mo5Cr4V2和W18Cr4V两个类型,由于两类钢的淬火加热温度相差较多,如混料误将6-5-4-2型作18-4-1型来淬火就会过烧,全部报废,用以下办法来鉴别是行之有效的。火花鉴别法:对车刀、钻头、铰刀、立铣刀、推刀等有柄工具可在砂轮上轻磨端面,用火花鉴別。18-4-1型火花特征是:流线少、且暗,中部、根部断续,无爆花,呈弧尾花;6-5-4-2型较18-4-1型亮,呈桔红色,有爆花,尾部有枪尖尾花。简易滴定法:如6-5-4-2型高速钢与其他高速钢混合,又是精密刀具,
Now commonly used high-speed steel W6Mo5Cr4V2 and W18Cr4V two types, due to the two types of steel quenching temperature difference is more, such as mistakenly mix 6-5-4-2 type 18-4-1 type to quench will have Burn, all scrapped, the following methods to identify is effective. Spark identification method: on the turning tools, drill bits, reamers, end mills, push knives and other sharpened tools on the wheel light grinding face, using spark identification. 18-4-1 type of sparks are: less flow lines, and the dark, central, intermittent roots, no popcorn, arc-shaped flower; 6-5-4-2 type 18-4-1 bright, was orange Red, a popcorn, the tail has a gun tip flower. Simple titration: such as 6-5-4-2 high-speed steel mixed with other high-speed steel, but also a precision tool,