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我厂305轴承塔形锻造流水线上使用的塔形锻造下模片,是用3Cr2W8V制作的,形状及装模情况如图1、图2。工作条件为:锻件为GCr15,温度为1000～1100℃,每分钟锻压30～40次,模腔用细水流冷却。图纸要求该模片最终热处理后硬度为HRC45～50。原采用图3热处理工艺,处理后硬度符合图纸要求,但使用几百次到2500次因发生早期开裂而报废。因寿命低影响生产而成为薄弱环节。
Our tower 305 tower bearing forging assembly line used in the tower forging under the mold, is made of 3Cr2W8V, shape and mold loading situation in Figure 1, Figure 2. Working conditions: forgings GCr15, the temperature is 1000 ~ 1100 ℃, forging 30-40 per minute, the cavity with a thin stream of cooling. Drawings require the final hardness of the die after HRC45 ~ 50. The original heat treatment process using Figure 3, the hardness after treatment in line with the drawings, but the use of hundreds to 2500 times due to early cracking and scrapped. Low life expectancy affects production and becomes a weak link.