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- The microstructure of isothermally-quenched ductile iron (ADI) is a mixture structure consisting of austenite plus acicular ferrite. 摘要等温淬火球铁的显微组织由奥氏体加针状铁素体的混合组织组成。
- The result showed that the microstructure dominated by fine and homogeneous acicular ferrite had the better resistance to SSCC. 结果表明:均匀细小的针状铁素体为主的显微组织具有优良的抗SSCC性能;
- The microstructure of deposit is mainly acicular ferrite when Si content is low, and block ferrite when Si content is high. 低硅含量时，熔敷金属显微组织以针状铁素体为主，高硅含量时，则以块状铁素体为主；
- The steel can beof optimal in the toughness at low temperatre on condition that its structure is mainly composedOf cross-distributed acicular ferrite. 钢中显微组织如以交义分布针形铁素体为主要组织特征时,则将具有最佳的抗冷脆性能。
- The acicular ferrite morphology at the weld side is affected by welding parameter, and the inclusions are located at the boundaries of ferrite. 熔合区焊缝侧针状铁素体的形态与焊接线能量有关。氧化物夹杂大多位于针状铁素体边界。
- The results show that the X65 pipeline steel with acicular ferrite produced by Steckel mill rolling has excellent mechanical properties. 对X65管线钢的炉卷轧制工艺进行了实验室模拟研究,并采用光学、电子显微技术和力学分析等方法研究了X65管线钢的微观组织与性能。
- Metallographic analyses show that the ultrasonic welding significantly refines the grains with more acicular ferrite appears in the fusion zone. 金相分析表明，在电弧超声作用下，焊缝结晶组织明显细化，焊缝区针状铁索体增加。
- The results show that niobium increment retains the formation of pearlite and makes fraction of acicular ferrite and fine niobium carbonitride niobium increase. 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 complex inclusions in CGHAZ promote the acicular ferrite formation, which is associated with heat input and affects the mechanical properties of CGHAZ. 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。
- Both the high density tangled dislocation and carbonitride precipitated along with dislocation networks inducing acicular ferrite had the better resistance to SSCC. 针状铁素体内高密度缠结的位错和碳氮化物在位错网络上的沉淀析出是针状铁素体钢具有优良的抗SSCC性能的主要原因。
- By taking reasonable hot-rolling process,the microstructure of X70 production was mainly acicular ferrite,and its strength and toughness were good enough to satisfy the... 采取合理的热连轧工艺生产的X70钢,其组织以针状铁素体为主,强韧性优良,各项性能均满足“西气东输工程制管用热轧板卷技术条件”的要求。
- The effects of the size,distribution and chemical composition of inclusions on nucleation of acicular ferrite in deposited metals of micro-alloyed steel were studied. 研究了微合金钢熔敷金属中夹杂物大小、尺寸分布和化学成分对针状铁素体形核的影响。
- Mechanical properties and microstructural characters of hot-rolled plates of an acicular ferrite steel for line pipe were investigated by transmission electron micrographs (TEM). 摘要在透射电镜(TEM)下观测了一种管线用针状铁素体钢热轧板材的显微组织并研究了力学性能。
- The results show that higher Nb content is favorable for obtaining acicular ferrite (AF).Accelerated cooling promotes AF transformation, and refines lath size of AF. 结果表明，铌含量高有利于在极低的冷却速率下获得针状铁素体组织，提高冷却速率则能进一步促进针状铁素体转变，并使铁素体板条得到细化。
- The excellent properties of this steel are resulted from ultra-low carbon acicular ferrite with interaction of very fine precipitated particles and high-den... 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 results show that higher Nb content is favorable for obtaining acicular ferrite(AF).Accelerated cooling promotes AF transformation,and refines lath size of AF. 结果表明,铌含量高有利于在极低的冷却速率下获得针状铁素体组织,提高冷却速率则能进一步促进针状铁素体转变,并使铁素体板条得到细化。
- So far as the grain size order of magnitude is concerned, the thickness of the acicular ferrite is about 200nm, while the thickness of the austenite existing inside the ferrite is only several nm to 10 nm. 从晶粒尺寸数量级来说，针状铁素体的厚度约为200纳米，而铁索体内奥氏体的厚度仅为几到10纳米数量级。
- The microstructure of weld metal for SAW is acicular ferrite, and there is new type bainitic microstructure in heat-affected zone, grains are well-distributed and good joining in bond area. 埋弧焊焊后不热处理焊缝部分组织为针状铁素体，熔合线结合良好，组织分布均匀，晶粒细小，热影响区组织为新型贝氏体。
- Experimental results show that the high strength pipeline steel with acicular ferrite microstructure has higher ability to prevent impact cracking than that with ferrite pearlitic microstructure. 结果表明,针状铁素体型管线钢比多边形铁素体+少量珠光体型管线钢具有更高的冲击韧性。
- Role of CuS in Formation Nucleation of Acicular Ferrite CuS在针状铁素体形核过程中的作用
