极限拉深比用直观的方式反映了薄板材料的压延性能，它的测试可以用Swift试验方法完成，也可以用Engelhardt试验方法完成，且试验结果受润滑方式影响较大。采用两种试验方法、两种润滑方式测试了不锈钢薄板的极限拉深比，并对试验结果进行了分析。结果表明：拉深油润滑方式下测得的极限拉深比远远高于凡士林润滑方式，并且试验结果稳定；不发生剪裂时，拉深油润滑方式下两种试验方法测试的极限拉深比相差很小，相对偏差小于1％。
Limit drawing ratio straightly reflect drawability of metallic material sheet. Swift test method or Engelhardt test method can be employed for test and test results can be deeply affected by lubricating method. Using two test methods and two lubricating methods, drawing test was done on stainless steel sheet. The results showed that 1 ） limit drawing ratio lubricated by drawing oil is far bigger than that by Vaseline and the test result is provided with better stability, and 2） while lengthways crack doesn＇t appear, limit drawing ratio lubricated by drawing oil has very small discrepancy under two test methods, relative deviation is less than 1%.
参考文献
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| [2] | GB/T15825.3—2008.金属薄板成形性能与试验方法拉深与拉深载荷试验[S].北京:中国标准出版社,2009. |
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