| 1. | Cementite graphitization in fe - 2 . 3 si - 3 . 7c alloy
合金中渗碳体的石墨化 |
| 2. | The results indicated that low graphite spheroidization rate and free cementite were the main causes of poor mechanical property
试验结果表明，控制碳当量和球化剂加入量，采用瞬时孕育等可提高球化率；采用预热砂型等可减少渗碳体。 |
| 3. | Excessive imperfections even sub - grained boundaries may be introduced in cementite . this makes the accelerating dissolution and spheroidization of cementite easy . 5
由于渗碳体的强烈塑性变形，在其内部导入了大量的晶体缺陷甚至亚晶界。 |
| 4. | The main causes which lead to tensile abnormal fracture of swrh82b steel rods are the network cementite sod the big brittle inclusion
摘要通过对swrh82b盘条的拉伸断口进行分析，认为网状渗碳体和大颗粒脆性夹杂物等缺陷是引起断口异常的主要原因。 |
| 5. | 3 . on the present deformation condition , the cementite in pearlitic steel has more severe plastic deformation capability t - he max shear strain up to 1 . 9 . 4
C方式ecap变形条件使珠光体钢65mn中的渗碳体可以表现出很强的塑性变形能力? ?观察到的最大切变形达到1 . 9的等效真应变。 |
| 6. | It is known that a pearlitic material is composed of numerous pearlitic colonies with randomly distributed orientations , and in each colony there are many parallel ferrite and cementite laminas arranged alternatively
珠光体材料为两相材料，它由大量随机取向的珠光体团组成，每一珠光体团由包含大量铁素体片和渗碳体片交互叠合而成。 |
| 7. | In ecap route c , in order to accommodate the severe shear deformation the deformation form of lamellae cementite in pearlitic steel include periodical bending , periodical shearing and shearing fracture etc
在c方式ecap变形中，珠光体钢65mn中的渗碳体以周期性的弯曲变形，周期性的剪切变形，剪切断裂等形式协调ecap的强烈塑性变形。 |
| 8. | The strength of extension of low carbon ductile cast iron can reach 750mpa in casting state , the impact ductility can reach 20j / cm2 . the diameter of graphite nodule is 5 - 20 ( am , the base body is consisted of pearlite -
低碳球铁在铸态下的抗拉强度可达750mpa ，冲击韧性可达20j cm ~ 2 ，其中石墨球直径在5 20 m ，基体以珠光体为主，有少量的铁素体与渗碳体。 |
| 9. | The microstructure of lamellae pearlite has evolved ultrafine cementite particles throughout the ferrite matrix uniformly after five passes . the ferrite matrix is homogeneous grains , average grain size is - 0 . 3 m . 2
变形五道次后，片层状的珠光体组织演变成了超细的渗碳体颗粒均匀分布于铁素体基体的组织，铁素体基体为均匀的等轴晶，平均晶粒大小为0 . 3 m 。 |
| 10. | The main results are as the following : ( 1 ) the microstructure of lamellae pearlite has evolved ultrafine cementite particles throughout the ferrite matrix uniformly after four passes . the ferrite matrix is homogeneous grains , and average grain size is - 0 . 3um
主要结果如下： ( 1 ) ecap变形四道次后，片层状的珠光体组织演变为了超细的渗碳体颗粒均匀分布于亚微晶铁素体基体的组织。 |
