| met. |
灰口铸铁; 灰铸铁 (【技】通常指 w(C)2. 7% ~ 4. 0%, w(Si)0.5% -3% 和 Mn + P + S≤2% 的铁碳合金。碳量的75% ~ 90%为片状石墨，断口呈暗灰色，故由此得名。灰铸铁以其良好的铸造性能、减震性能、自润滑性能、加工性能、最小的缺口敏感性以及价格低廉等优点，广泛应用于中等负荷下的结构件、复杂的薄壁件以及润滑条件下的耐磨件等。: ① Many varieties of cast iron can be produced, by selection of different pig irons, by variations of the melting conditions in the cupola, and by special alloying additions, but in general the two main classifications are into white cast irons and grey cast irons. 通过选用不同的生铁、化铁炉中不同的化铁条件以及添加专用合金剂等，可以生产出多种铸铁；但一般而言，铸铁分为两大类 --- 白口铸铁和灰铸铁。② The small nodules of spheroidal graphite, however, allow the cast iron to be much stronger and tougher and more shock-resistant than ordinary grey cast iron. 然而小石墨球能使这种铸铁比普通灰铸铁强度更高、韧性更好、抗震性能更为优良。) |
