采用针状铁素体的管线钢具有较好的成形性能。
Pipeline steel adopting the spicular ferrite owns the better properties of forming.
鉴于针状铁素体型管道钢具有优异的综合性能，重要高压输气管道应采用针状铁素体管道钢。
The acicular ferrite pipeline steels have the excellent comprehensive properties and should be used for the key high-pressure gas transmitting pipelines.
钢的组织主要由针状铁素体和马氏体两相组成。
Mainly its metallographic structure consists of acicular ferrite and martensite.
简要介绍了宝钢试制的以针状铁素体组织为特征的X80级管线钢热轧板卷。
It represents the trial manufacture of grade X80 pipelines steel hot rolled coil with characteristic of acicular ferrite at BaoSteel Mill.
合理控制低合金高强钢焊缝中针状铁素体的转变行为，对获得理想的焊缝性能具有重要意义。
It is of great importance for obtaining the perfect welding properties to control the AF transformation behavior reasonably in HSLA steel weld.
其中针状铁素体之间细小的马氏体的存在与数量对钢的抗拉强度和低温冲击韧性起关键作用。
The existence and amount of small isolated martensite between the acicular ferrite play an important role in determining the tensile strength and low temperature impact toughness of the steels.
钢中的非金属夹杂物，对促进晶内针状铁素体的形成，提高焊缝金属韧性有显著的作用。
The role of inclusions on the nucleation of acicular ferrite in Ti-B containing weld metal was discussed.
试验钢由针状铁素体和少量块状铁素体组成，焊缝为典型的针状铁素体组织，焊接热影响区粗晶区以粒状贝氏体为主。
The toughness of weld metal is the highest while the coarse grained region in the HAZ is the lowest because of welding thermal cycle and formation of brittle microstructure.
结果表明：试验钢的组织由细小岛状马氏体与针状铁素体为主构成，马氏体体积分数为27．6%。
The results showed that the microstructure of the steel was mainly composed of fine island-like martensite and acicular ferrite, with a 27.6% of martensite volume fraction.
由于低屈强比和组织均匀，管线钢采用针状铁素体组织可以具有较好的（管）成型性及耐腐蚀性。 用针状铁素体管线钢平板或卷板制造的焊管的力学性能彼此相差不大。
Pipeline steel adopting the spicular ferrite owns the better properties of forming and anti corrosion for its low ratio of yield strength and tensile strength and uniform microstructure.
采用合适的TMCP工艺，可以在低碳合金管线钢中获得不同组成比的针状铁素体复相组织。
By using appropriate TMCP process, complex phase of acicular ferrite with different compositions could be obtained in low carbon alloy pipeline steel.
结果表明，该低碳贝氏体钢的微观组织主要为板条贝氏体、粒状贝氏体、准多边形铁素体及针状铁素体的复合组织。
The results indicate that the microstructure of specimen is mainly lathe bainite, granular bainite, quasi-polygonal ferrite and acicular ferrite.
结果表明，该低碳贝氏体钢的微观组织主要为板条贝氏体、粒状贝氏体、准多边形铁素体及针状铁素体的复合组织。
The results indicate that the microstructure of specimen is mainly lathe bainite, granular bainite, quasi-polygonal ferrite and acicular ferrite.
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