分析了带状碳化物的形成原因及影响带状碳化物显露的因素。
This paper analyses the reason for forming the zonal carbonide, the factors which have influenced on manifesting the zonal carbonide.
用金相显微镜两种不同倍数观察带状碳化物，为正确评定钢材质量提供依据。
Using two kinds of magnification of the metaloscope to observe the zonal carbonide, scientific basis for evaluating correctly the quality of the steel is provided.
结果表明，由于球化不良而产生的不均匀带状碳化物是造成气门电镦质量问题的重要因素之一。
The results show that the uneven distribution banded carbide due to abnormal spheroidization is one of important factors causing the quality problems of the valves after electric upsetting.
介绍了冷作模具钢中带状碳化物组织存在的原因，以及不均匀的碳化物组织对机械性能的影响。
The reason of existence of banding Carbide structure in Cr12 cold-worked die steel and the influence of asymmetric carbide structure on mechanical behaviour were introduced.
结果表明，辊身心部较高的内应力和在带状碳化物中存在严重的网状碳化物是造成大型支承辊置裂的主要原因。
The results showed that the higher internal stress and serious carbide network in the banded carbide in the inner roll body were the main causes of heavy back-up roll stationary cracking.
提出了避免碳化物带状偏析的有效措施。
The effective measures are presented bo avoid zonal segregation of carbide.
结果表明，原材料质量差，在锻打过程中锻打不充分致碳化物呈带状分布、碳化物粗大且呈棱角状，使材料力学性能差。
The result shows that the poor mechanical property of the material is due to insufficient forge which results in stout and angular carbide with zonal distribution.
观察显微组织发现，失效模具的显微组织中明显存在不均匀带状分布的碳化物。
The cause of fracture failure was researched. The results show that many uneven carbide belts obviously distribute in the microstructure.
结果表明，碳化物分布不均匀导致调质处理后在钻杆接头中产生“带状组织”。
The results revealed that the non homogeneous distribution of the carbide caused the "zonal structure" appeared in the joint of drill rod which is hardened and hightemperature tempered.
结果表明，碳化物分布不均匀导致调质处理后在钻杆接头中产生“带状组织”。
The results revealed that the non homogeneous distribution of the carbide caused the "zonal structure" appeared in the joint of drill rod which is hardened and high temperature tempered.
模具组织中存在不均匀带状分布的碳化物是产生断裂失效的内在原因，而模具在冷挤压成型过程中形成的应力积累是导致模具断裂失效的外在诱因。
The existence of uneven carbide belts is the inner reason of fracture failure and the stress accumulation during the process of cold extruding is its external incentives.
结果表明，碳化物分布均匀性提高，碳化物网状级别及碳化物带状级别降低，奥氏体晶粒尺寸减小。
The experimental results show that the uniformity of spherical carbide can be increased, the grade of network carbide and banded carbide can be decreased, the austenite grain can be refined.
严重的碳化物带状偏析，使拉刀产生局部淬火过热和回火不足，造成内应力急剧增高，最终导致拉刀断裂。
It was found that the broach was locally overheated due to band segregation of carbide, and under-tempered. These factors caused fracture of broach as a result of high internal stress.
结果表明：轧材的碳化物颗粒度较小，但碳化物分布略呈带状；
The results show that the carbide particle size in rolled products is smaller, but carbide distribution tends slightly to band;
结果表明：轧材的碳化物颗粒度较小，但碳化物分布略呈带状；
The results show that the carbide particle size in rolled products is smaller, but carbide distribution tends slightly to band;
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