拉伸变形对船用5083铝合金挤压带筋板性能的影响

Effects of tensile deformation on the performance of marine sheet with ribs of extruded 5083 aluminum alloy

5083铝合金应用领域甚广,但是较低的屈服强度限制了5083铝合金挤压型材的使用范围。试验采用不同的拉伸变形量、调整合金成分来提高船用5083铝合金挤压大宽幅带筋壁板的强度;通过对5083铝合金挤压带筋板材进行1%~6%范围内的拉伸处理,表明当拉伸变形率为2.5%~4.5%时,Rp0.2=210 N/mm^2~220 N/mm^2、Rm=295N/mm^2~310 N/mm^2、A50=19%~22%,产品的晶间腐蚀失重为4.5 mg/cm^2~6 mg/cm^2,耐剥落腐蚀等级为N级,产品各项性能够满足《CCS材料与焊接规范》中5083-H116标准值的要求。

Though 5083 aluminum alloys are widely used,they are still restricted due to their relatively low yield strength. The strength of ribbed wide-walled sheets of extruded 5083 aluminum alloys has been improved in the experiment with different tensile deformations and alloy compositions. The sheet was stretched in 1%-6%. When the tensile deformation rate is 2. 5%-4. 5%,Rp0. 2 is 210 N/mm2-220 N/mm2,Rmis 295 N/mm2-310 N/mm2,and A50 is 19%-22%,the intergranular corrosion mass loss is 4. 5 mg/cm2-6 mg/cm2 and spalling corrosion resistant level is N. All the performances of the product meet the requirements of 5083-H116 standard values in CCS Materials and Welding Specification.