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利用Gleeble-3800热模拟试验机研究了一种新型硫-铅-碲复合易切削不锈钢热塑性,并对变形前后试样进行了光镜和电镜观察。结果表明,钢基体中存在大量Mn S、Pb及其Mn S-Pb-Te共同形成的复合夹杂物。温度对材料的热塑性产生重要影响,在大于900℃、小于1200℃区间断面收缩率大于60%,具有好的热塑性。φ350电渣锭从钢锭表面至心部,热塑性差异不大,但呈逐渐递减趋势,且与夹杂物大小和间距存在密切关系。
A new type of sulfur-lead-tellurium composite cutting stainless steel was investigated by Gleeble-3800 thermal simulator. The specimens before and after deformation were observed under light and electron microscopes. The results show that a large amount of MnS, Pb and MnS-Pb-Te composite inclusions exist in the steel matrix. The temperature has an important influence on the thermoplasticity of the material, and the cross-section shrinkage is greater than 60% when the temperature is greater than 900 ° C and less than 1200 ° C, and has good thermoplasticity. φ350 electroslag ingot from the ingot surface to the heart, the thermoplastic little difference, but showed a gradual downward trend, and with inclusion size and spacing are closely related.