CAJ | 학술논문

对电冶熔铸钢结硬质合金DGJW30进行了热处理。借助光学显微镜、扫描电镜、能谱分析和X射线衍射等方法研究了DGJW30合金的显微组织。分析了淬火温度对组织、硬度和抗弯强度的影响。结果表明，DGJW30合金淬火态的基体组织为隐晶马氏体，硬质相中既有未溶的碳化钨颗粒又有再结晶的碳化物。随着淬火温度升高至1050℃，DGJW30合金的硬度上升，但淬火温度再高（1100℃）时，将使合金的硬度显著下降，而抗弯强度随着淬火温度的升高而不断升高。
대전야용주강결경질합금DGJW30진행료열처리。차조광학현미경、소묘전경、능보분석화X사선연사등방법연구료DGJW30합금적현미조직。분석료쉬화온도대조직、경도화항만강도적영향。결과표명，DGJW30합금쉬화태적기체조직위은정마씨체，경질상중기유미용적탄화오과립우유재결정적탄화물。수착쉬화온도승고지1050℃，DGJW30합금적경도상승，단쉬화온도재고（1100℃）시，장사합금적경도현저하강，이항만강도수착쉬화온도적승고이불단승고。
The electromelted and cast DGJW30 steel-bonded carbide was heat treated and subjected to microstructure survey by means of OM,SEM,EDS,and XRD.The effect of austenitizing temperature on the microstructure,hardness and bending strength of the DGJW30 carbide was investigated.The results show that matrix structure of as-quenched DGJW30 carbide is crypto-crystalline martensite,and that the hard phase contains both the undissolved tungsten carbide and recrystallized carbide.Besides,as the austenitizing temperature rises up to 1050 ℃ hardness of the DGJW30 carbide increases and,however,the quenching from still temperature of 1 100 ℃ will render hardness of the DGJW30 carbide much lower.The bending strength increases progressively with the elevation of the austenitizing temperature up to 1 100 ℃.