CAJ | 학술논문

生产中发现部分钻头存在萘状断口仔晶，这种晶粒没有完全发育成萘状断口大晶粒形态，本质依然是高速钢的二次再结晶。通过长期的跟踪发现，仔晶对高速钢钻头的韧性造成不利影响，导致产品出现断裂、掰刃现象。通过原材料充分退火，轧制工序适当降低高频频率，热处理工序适当采用较高的预热温度均可以消除这种现象，保证产品质量。
생산중발현부분찬두존재내상단구자정，저충정립몰유완전발육성내상단구대정립형태，본질의연시고속강적이차재결정。통과장기적근종발현，자정대고속강찬두적인성조성불리영향，도치산품출현단렬、배인현상。통과원재료충분퇴화，알제공서괄당강저고빈빈솔，열처리공서괄당채용교고적예열온도균가이소제저충현상，보증산품질량。
Part of the drill appeared incomplete development naphthalene fracture during the production , the grain was not fully developed into naphthalene fracture large grain , the nature was still secondary recrystallization of HSS .After long-term follow-up found that incomplete development caused adverse effect to the toughness of HSS drill , and lead to prod-ucts appear rupture , break off the blade .The phenomenon can eliminate effectively to ensure the quality of products through raw materials fully annealed , rolling process decreased the frequency of high frequency suitably , heat treatment process suitably used higher preheating temperature .