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用于制作液压元件等重要部件的无缝钢管,对力学性能、尺寸公差和表面光洁度等的要求极为严格。目前采用的常规生产工艺是将低合金热轧厚壁钢管进行调质处理、内镗(或外剥皮)、磨削和抛光等。这一工艺的缺点是金属切削量大、生产周期长、产量低、成本高。成都无缝钢管厂采用钢管冷形变多边化热处理新工艺试制高精度液压元件用无缝钢管获得了成功。用于制作缸体的钢管加工工序已由原来的11道次减少至4道,金属收得率由72%提高到88～89%。经用这种新工艺处理的碳素钢可以代替低合金钢使用,而且镀
Seamless steel pipes used to make important components such as hydraulic components are extremely demanding for their mechanical properties, dimensional tolerances and surface finishes. The current conventional production process is the low-alloy hot-rolled thick-walled steel pipe quenched and tempered, boring (or peeling), grinding and polishing. The disadvantage of this process is a large amount of metal cutting, long production cycle, low output and high cost. Chengdu Seamless Steel Tube Plant cold deformation of steel with a new heat treatment process of high-precision hydraulic components trial of the seamless steel pipe has been successful. For the production of steel cylinder processing processes have been reduced from the original 11 to 4, metal recovery rate increased from 72% to 88 ~ 89%. Carbon steel treated with this new process can be used instead of low alloy steel and plated