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| 不同锻造比和Q值对身管横向力学性能的影响 |
| Effects of Different Forging Ratios and Q Values on Lateral Performance of Barrel |
| Received:August 09, 2018 Revised:November 10, 2018 |
| DOI：10.3969/j.issn.1674-6457.2018.06.013 |
| 中文关键词: 径向锻造 Q值 锻造比 身管 横向胀形 力学性能 |
| 英文关键词: radial forging Q value forging ratio barrel plasticit mechanical properties |
| 基金项目:国防基础科研项目 |
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| 中文摘要: |
| 目的 针对传统轻武器身管材料30SiMn2MoVA，研究不同锻造比和Q值对身管横向力学性能的影响。方法 通过弹线膛同锻工艺，径向锻造身管加工成试件，在胀形实验中采用固体不可压缩材料，获得身管横向力学性能。结果 身管材料锻后塑性变形量越大胀破裂纹越长，且未去应力试件准解理特征断口上出现轴向裂纹缺陷，胀破后沿着裂纹扩展而出现两侧开裂现象，去应力后均无此特征。结论 锻前身管材料塑性伸长率最高，随着变形量锻造比和Q值增大，锻后身管的横向塑性伸长率越低，胀破裂纹的长度增长；当锻造比为41%，Q值为0.46状态下，去应力前塑性消耗最大，伸长率降低6.9%；身管减壁厚阶段（Q≥0.26，锻造比大于34%），其横向屈服极限和抗拉强度均随着Q值的变大而增大。 |
| 英文摘要: |
| The paper aims to study effects of different forging ratios and Q values on transverse mechanical properties of barrel in traditional light weapon barrel material 30SiMn2MoVA. The tubular body was forged into a test piece by the elastic wire forging process. The transverse mechanical properties of the barrel were obtained by the bulging experiment applied by the solid incompressible material in the bulging die. The larger the plastic deformation of barrel material after forging, the longer the expansion and rupture marks, and the axial crack defects appeared on the fractures of the quasi-cleavage characteristics of the specimen before the stress was removed. There was no such feature after stress removal. The forging material has the highest plastic elongation rate before forging. The forging ratio and Q value of the barrel increase with the deformation. The lower the transverse plastic elongation of the barrel after forging, the longer the length of the expansion and rupture pattern; when the forging ratio is 41%, the Q value is 0.46 state, the plastic consumption before stress is the largest, the elongation is reduced by 6.9%; the tube thickness reduction stage (Q≥0.26, forging ratio is more than 34%), and the transverse yield limit and tensile strength increase with the increase of Q value. |
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