高速钢大圆刀的热处理
Heat Treating of Large-sized High Speed Steel Round Cutters
赵步青 1胡明 1胡会峰1
作者信息
- 1. 安徽嘉龙锋钢刀具有限公司,安徽 马鞍山 243131
- 折叠
摘要
高速钢大圆刀外径为200～420 mm、内径为 145～254 mm、厚度为 5～10 mm,不仅精度要求高,硬度要求高达62.5～64 HRC,大多采用盐浴炉淬火、回火.安徽嘉龙锋钢公司对外径为310 mm、内径为190 mm、厚5mm的W6Mo5Cr4V2 钢刀具在锻后退火和去应力退火后,在保护气氛炉中加热至1 175～1 185℃ 奥氏体化和氮气冷却,随后在台车式炉中 540～550℃ ×3 h回火 3 次.结果表明:大圆刀的精度和硬度均符合要求.
Abstract
Large-size dhigh speed steel round tools having OD ranging from 200 to 420 mm,ID ranging from 145 to 254 mm and thickness ranging from 5 to 10 mm,besides high precision requirement,are required to have hardness as high as 62.5 to 64 HRC,and are mostly hardened and tempered in salt bath furnace.W6Mo5Cr4V2 steel tools 310 mm OD by 190 mm ID by 5 mm thick were austenitized at 1 175 to 1 185℃ and cooled in nitrogen gas in a protective-atmosphere furnace,and then tempered 3 times at 540 to 550℃ for 3 h in a car-bottom hearth furnace after annealing subsequent to forging and stress relieving in Anhui Jialong Fenggang Co.The results showed that both the precision and hardness of the large-sized round tools conformed with the requirements.
关键词
高速钢/大圆刀/保护气氛/硬度/精度Key words
high speed steel/large-sized round tool/hardness/precision引用本文复制引用
出版年
2024
NETL
NSTL
万方数据