论文部分内容阅读
我国的切削刀具一般采用 W18Cr4V 及W6Mo5Cr4V2两种高速钢制作。W18Cr4V 钢的淬火加热温度在1270～1310℃范围内,目前国内多采用1280℃。由于材质上的差异,同一牌号的高速钢,其最佳淬火加热温度相差20℃。加之目前测温仪表示值误差较大,不够稳定,又多采用间断式测温,且盐浴内的温度也不够均匀,因而,淬火加热温度的控制不易准确,往往会出现刀具过热,过烧或欠热等现象。另外,采用高的淬火加热温度,虽可得到较高的硬度,但同时导致了韧性下降,容易产生淬火
China’s cutting tools generally use W18Cr4V and W6Mo5Cr4V2 two kinds of high-speed steel production. W18Cr4V steel quenching temperature in the 1270 ~ 1310 ℃ range, the current use of 1280 ℃. Due to material differences, the same grade of high-speed steel, the best quenching heating temperature difference of 20 ℃. Combined with the current thermometer that the value of the error is not stable enough, and the use of intermittent temperature measurement, and the salt bath temperature is not uniform enough, so the quenching temperature control is not easy to accurately, often there tool overheating, over-burning Or owe fever and other phenomena. In addition, the use of high quenching temperature, although higher hardness can be obtained, but at the same time leads to decreased toughness, prone to quenching