CAJ | 학술논문

借助金相分析、扫描电镜及能谱分析、硬度和性能测定研究了淬火后回火温度对电冶熔铸钢结硬质合金DGJW30显微组织、硬度和抗弯强度的影响。结果表明，经200℃、450℃和650℃回火后， DGJW30钢结合金的显微组织分别为马氏体和残留奥氏体、回火托氏体和回火索氏体；随着回火温度的升高，DGJW30钢结合金的硬度下降，抗弯强度则先升高后下降。
차조금상분석、소묘전경급능보분석、경도화성능측정연구료쉬화후회화온도대전야용주강결경질합금DGJW30현미조직、경도화항만강도적영향。결과표명，경200℃、450℃화650℃회화후， DGJW30강결합금적현미조직분별위마씨체화잔류오씨체、회화탁씨체화회화색씨체；수착회화온도적승고，DGJW30강결합금적경도하강，항만강도칙선승고후하강。
The microstructure , hardness and bending strength of an electro-slag melting and casting steel-bonded carbide DGJW30 quenched and tempered at different temperatures were investigated by means of metallographic examination , hardness and property measurements , SEM and EDS .The results show that the microstructures of the DGJW30 steel-bonded carbide tempered at 200 ℃, 450 ℃ or 650 ℃ are martensite plus residual austenite , tempered troostite and tempered sorbite respectively , and that with the rise in tempering temperature , the hardness of the steel-bonded carbide decreases , and the bending strength first increase and then decrease .