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SUS430不锈钢成形性能分析及控制
Formability Analysis and Control of SUS430 Stainless Steel
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- DOI:
- 作者:
- 郭蓉 刘天增 杨瑞成
GUO Rong;LIU Tianzeng;YANG Ruicheng
- 作者单位:
- 酒泉钢铁集团 兰州理工大学
Jiuquan Iron and Steel of Group Co.,Ltd.,Jiayuguan 735100,China;Lanzhou University of Technology,Lanzhou 730000,China
- 关键词:
- SUS430 成形性能 开裂 r
SUS430 formability cracking r
- 摘要:
- 对提升SUS430铁素体不锈钢冲压成形性能进行了研究,高等轴晶率钢卷的r值为0.905。结果表明,降低开轧温度的钢卷抗拉强度比正常工艺卷抗拉强度略高,低开轧温度钢卷r为0.858。两轧程试验卷与对比卷相比,屈服强度、抗拉强度和伸长率分别提高24.17 MPa,8.25 MPa和1.81%,r值高0.57,△r值高0.094。两轧程试验卷与大压下卷相比,屈服强度比大压下小10 MPa左右,抗拉强度值相差不大,伸长率高1.72%,r值高0.16,△r值高0.175。二轧程钢卷的伸长率和r都得到了提升,二轧程钢卷具有良好的成形性能,但是二轧程增加了△r值,材料的各向异性提高。生产过程中,针对冲压性能高一些的可以选择大压下工艺,轧程压下率控制在70%以上;对于结构复杂,冲压要求较高的采取二轧程工艺。
The stamping formability of SUS430 ferritic stainless steel was studied.The value of high axial crystallinity coil r was 0.905.The results show that the tensile strength of coils with lower open rolling temperature is slightly higher than that of coils with normal rolling temperature,and the tensile strength of coils with lower open rolling temperature r is 0.858.The yield strength,tensile strength and elongation of test rolls increased by 24.17 MPa,8.25 MPa and 1.81%,respectively,and the values r and△r is higher by 0.57 and 0.094,respectively.The yield strength of the test roll is about 10 MPa lower than that of the test roll under high pressure,and the tensile strength value is not different from that of the test roll under high pressure.The elongation is 1.72%higher,and the values r and△r is 0.16 and△r is 0.175 higher.Both the elongation and the formability of the coil are improved,but the anisotropy of the material is improved by increasing the value of△r during the second rolling process.In the production process,for the stamping performance of some can choose a large pressure down process,rolling process pressure down rate control in more than 70%;For complex structure,high stamping requirements to adopt two rolling process.