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采取外层先离心浇注10#钢,内层浇注1Cr18Ni9Ti进行离心复合,空心管坯机加工后,经过热挤压和冷轧,试制了准47mm×4.5mm的碳钢/不锈钢复合钢管,从而对离心复合浇注-挤压-轧制不锈钢复合钢管的生产工艺进行了研究。检测结果表明,外层碳钢与内层不锈钢冶金结合良好,不锈钢内层厚度相对均匀,化学成分稳定;离心管坯经挤压轧制后晶粒明显细化,复合钢管抗拉强度、屈服强度比标准1Cr18Ni9Ti高,伸长率有所降低,压扁、弯曲、晶腐检验合格。因此离心复合浇铸-挤压-轧制工艺生产不锈钢复合钢管工艺是可行的。
Centrifugal cast outer layer 10 # steel, the inner layer of 1Cr18Ni9Ti pouring centrifugal composite hollow tube processing, after hot extrusion and cold-rolled, trial-made 47mm × 4.5mm carbon steel / stainless steel composite pipe, so that Centrifugal compound casting - extrusion - rolling of stainless steel composite pipe production process was studied. The test results show that the outer layer of carbon steel and the inner stainless steel metallurgical bonding well, the inner layer of stainless steel is relatively uniform thickness, chemical composition and stability; centrifugal tube after extrusion rolling significantly refined grain, tensile strength of composite pipe, yield strength Higher than the standard 1Cr18Ni9Ti, the elongation decreased, flattening, bending, crystal rot test pass. Therefore, centrifugal compound casting - extrusion - rolling process of stainless steel composite pipe technology is feasible.