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.
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.
熔敷金属组织主要是针状铁素体，少量的先共析铁素体。
Microstructure of the deposited metals is composed of acicular ferrite and a little proeutectoid ferrite.
熔敷金属组织主要是针状铁素体，少量的先共析铁素体。
The microstructure is composed of acicular ferrite and a little proeutectoid ferrite.
提高冷却速度和降低终冷温度可以增加针状铁素体的比例。
The ratio of acicular ferrite may increase by raising cooling speed and decreasing final cooling temperature.
焊缝组织主要由晶界铁素体、侧板条铁素体和针状铁素体组成；
The welded metal consists of grain boundary ferrite, ferrite side plate and acicular ferrite.
随着焊缝铜含量的增加，针状铁素体数量增加，焊缝显微硬度增大。
The amount of the acicular ferrite and hardness of the weld metal increase as cu content increasing.
结果表明，当获得针状铁素体组织时，钢板具有最佳的综合力学性能。
The results show that the steel plate has excellent integrated mechanical properties, when it obtain the acicular ferrite.
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.
相变区的冷却速度减慢，晶界铁素体数量增多，针状铁素体的尺寸显著增大。
The amount of ferrite in grain boundaries and the size of acicular ferrite is increased with the increase of cooling rate during phase formation.
随着热输入增大，焊缝柱状晶宽度增大，焊缝中针状铁素体板条有粗化的趋势；
With the increasing of heat input, the width of columnar crystal is increased, the dimension of acicular ferrite of weld metal is increased.
其征一束针状铁素体由许多位相相同，厚度大约200纳米的薄铁素体片组成。
Every its bunch ferrite consists of many phase-equal ferrite thin slices with thickness of about 200nm.
焊缝金属区晶粒分布均匀，焊缝金属区多为针状铁素体，能够提高焊缝区的韧性。
Weld metal zone are mostly acicular ferrite which can improve the weld zone toughness.
结果表明，锆的加入增加了焊缝金属中针状铁素体的含量，改善了焊缝金属的微观组织。
The results show that the addition of Zr increases the content of acicular ferrite and improves the microstructure of weld metal.
结果表明：随钼的质量分数增加，针状铁素体的含量增加，并且出现了M - A组织。
The results show that, with the increase of Mo content, the acicular ferrite's content increases, and M-A microstructure appears.
其优良的性能得益于具有与细小析出相交互作用的高密度位错的超低碳针状铁素体组织。
The excellent properties of this steel are resulted from ultra-low carbon acicular ferrite with interaction of very fine precipitated particles and high-den…
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.
其优良的性能得益于具有与细小析出相交互作用的高密度位错的超低碳针状铁素体组织。
The excellent properties of this steel are resulted from ultra-low carbon acicular ferrite with interaction of very fine preci…
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.
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.
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.
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.
结果表明，随冷却速率的增大，先共析铁素体的晶粒尺寸减小，体积分数增大，针状铁素体增多；
The results show that with the increase of cooling rate, the grain size of proeutectoid ferrite decreases, the volume fraction of proeutectoid ferrite and acicular ferrite increases.
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.
研究结果表明，铌含量的提高抑制了珠光体的形成，促进了针状铁素体的形成，细小的碳氮化铌析出相增多；
The results show that niobium increment retains the formation of pearlite and makes fraction of acicular ferrite and fine niobium carbonitride niobium increase.
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.
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：CGHAZ中复合夹杂物可促进针状铁素体的形成，针状铁素体的数量与输入线能量有关并显著影响CGHAZ的力学性能。
The complex inclusions in CGHAZ promote the acicular ferrite formation, which is associated with heat input and affects the mechanical properties of CGHAZ.
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.
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.
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