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本文针对热挤压不锈管抗拉强度偏低的情况,以高温形变热处理原理为依据,在模拟试验的基础上,通过220系列和260系列两次生产性试验,重点探讨了以1Cr18Ni9Ti 钢为代表的热挤压不锈管抗拉强度偏低的机理。用 x 射线衍射法测定了挤后水冷条件下材料内部的微观应力和嵌镶块结构,这些微观变化引起 x 射线衍射峰积分宽度变宽,对应的材料宏观抗拉强度提高,从而解释了原来挤后水冷工艺由于材料发生再结晶而使强度偏低的机理。同时展示了挤后水冷工艺用于生产的广阔前景。
In this paper, the hot extrusion stainless steel tube tensile strength is low, based on the theory of high temperature deformation heat treatment, based on the simulation test, through the 220 series and 260 series of two production tests, focusing on the 1Cr18Ni9Ti steel for the The mechanism of the low tensile strength of the hot-extruded stainless steel tube is represented. X-ray diffraction method was used to determine the micro-stress and the embedded block structure of the material under squeezed water-cooling conditions. These micro-changes caused the broadening of the integral width of the X-ray diffraction peak and the corresponding macroscopic tensile strength of the material to increase, After the water cooling process due to recrystallization of the material so that the intensity of the mechanism. At the same time shows the squeeze water cooling process for the production of broad prospects.