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研究了电炉工艺和电渣工艺生产的8Cr20SiZNi钢中碳化物类型、形貌、分布特征及其室温性能随温度的变化。在Philips CM12电子显微镜中观察到1050℃加热时晶内块状和粒状M_(23)C_6数量最多,尺寸最大,冷却时原奥氏体晶界块状M_(23)C_6之间还析出少量精细颗粒和薄片M_7C_3;随着加热温度的升高,块状M_(23)C_6数量减少,粒状M_(23)C_6 精细颗粒和薄片枝晶M_7C_3的数量增多,在高于1150℃加热和加热后的冷却过程中,枝晶薄片和精细颗粒M_7C_3聚集长大、增多。
The carbide types, morphology, distribution characteristics and room temperature properties of 8Cr20SiZNi steel produced by electric furnace and electroslag process were studied with the change of temperature. In the microwave CM12 electron microscope, the number of massive and granular M_ (23) C_6 in the crystal is the largest and the size is the largest when it is heated at 1050 ℃. A small amount of fine precipitates are also precipitated between the original austenite grain boundaries M_ (23) C_6 during cooling Particles and flakes M_7C_3. With the increase of heating temperature, the amount of massive M_ (23) C_6 decreased and the amount of granular M_ (23) C_6 fine particles and dendrite M_7C_3 increased. After heating and heating above 1150 ℃ During cooling, dendrites and fine particles M_7C_3 aggregated and grew up.