摘要
对高碳中锰耐磨钢的铸态、１０５０℃×１ｈ水淬及再加３５０℃×４ｈ回火的组织及力学性能进行了研究。随碳（１．５８～２．２０％）量增加或锰（４．２７～６．２９％）量降低，铸态及热处理后的韧性下降而硬度升高。在合碳２．１～２．２％时，加工硬化能力较差。随铬（０．２７～３．０２％）量增加，铸态韧性增加，硬度降低，而１０５０℃×１ｈ水淬后的性能则相反，但铬达３．０４％时加工硬化能力变小。稀土变质处理可降低铸态韧性，增加硬度，同时提高热处理后的韧性及硬度。铬和稀土可减少或消除铸态针状碳化物，但却增加铸态晶间碳化物。
Investigations have been carried out into the microstructure and mechanical properties of highcarbon wear-resistant steel with medium manganese content in as-cast. water-quench at 1050℃ for 1h and temper at 350℃ for 4h. The impact toughness decreases and hardness increases with raising carbon content (1. 58～2.20%) or reducing manganese content (4. 27～6. 29%) in both of as-cast and heat-treatment states, the ability for work hardening of the wear-resistant steel containing 2. 1～2. 2%C was worse. Increasing Cr content (0. 27～3. 02%) can raise as-cast impact toughness while decrease hardness, the properties of the wear-resistant steel after water-quench at 1050C for 1h were contrary,when adding Cr up to 3. 04 %, the ability for work hardening was cut down. RE modification treatment decreased as-cast impact toughness and increased hardness, at the some time, improved both the impact toughness and hardness in heat-treatment state. Cr and RE can reduce or eliminate the as-cast needle carbides, but promote carbides at grain boundary.
出处
《铸造》
CAS
CSCD
北大核心
1996年第4期18-21,共4页
Foundry
