The test results showed that Nb could prevent recrystallization of deformed lath martensite structure at 600 ~ 680 ℃, and the aged structure was tempered sorbite kept lath martensite phase direction with no ferrite particles discovered. 试验结果得出在600~680℃范围内,Nb能阻止变形马氏体组织的再结晶,时效组织主要为保持板条马氏体位向的回火索氏体,未发现粒状铁素体。
No pro-eutectoid ferrite appears when steel is loaded in 800 ℃. 在800℃加载时可以避免先共析铁素体的产生。
It is pointed out that the structures of high toughness weld seams contain over 90 % needle-like ferrite, few or no proeutectic ferrite and flank plates or laths ferrite. 指出,高韧性焊缝组织特征是90%以上的针状铁素体,少量或没有先析铁素体和侧板条铁素体。
There's no space even for a shock-resistant resin ferrite. 即使抗震树脂铁酸盐也无法容下。