Stainless steel seamless oil pipe for automobile

Abstract

The invention discloses a stainless steel seamless oil pipe for an automobile. A manufacturing method of the stainless steel seamless oil pipe for the automobile comprises the steps that PVC resin with the polymerization degree being about 2500 is selected, buna-N rubber is used as modified resin, a tricarboxymethyl propane triacrylate (TMPA) monomer is used as a cross-linking agent, an electronicbeam is adopted for carrying out irradiation modification on mixed rubber of the PVC resin and the buna-N rubber, and the outer surfaces of the two ends of a straight pipe are coated with the mixed rubber. The inner wall smoothness and inner structure of the steel pipe for the automobile are uniform, the internal smoothness problem is solved through the principle that the outer diameter is matched with the wall thickness, capillary cracks of the inner wall brought by original blank materials of the steel pipe are eliminated, steel pipe internal structure uniformity is achieved, the fine grainstructure is obtained, the outer surface of the straight pipe is evenly coated with the mixed rubber of the PVC resin and the NBR, the oil resistance of the TP304 stainless steel seamless steel pipeis improved, the shrinkage deformation rate is small, and long-term use is facilitated.

Description

technical field [0001] The invention relates to a pipe for automobiles, in particular to a stainless steel seamless oil pipe for automobiles. Background technique [0002] Stainless steel seamless steel pipe is a long strip of steel with a hollow section and no seams around it. The characteristics of stainless steel seamless pipe: First, the product is economical and practical. The thinner the wall thickness, the lower its processing cost. Second, the process of the product determines its limited performance. Generally, the precision of seamless steel pipes is low: uneven wall thickness, low brightness inside and outside the tube, high cost of sizing, and there are pits and black spots on the inside and outside. It is not easy to remove; third, its detection and shaping must be processed off-line, so it reflects its superiority in high-pressure, high-strength, and mechanical structural materials. The types of stainless steel pipes: hot rolling and hot extrusion And cold dra...

AI Technical Summary

Problems solved by technology

[0002] Stainless steel seamless steel pipe is a long strip of steel with a hollow section and no seams around it. The characteristics of stainless steel seamless pipe: First, the product is economical and practical. The thinner the wall thickness, the lower its processing cost Second, the process of the product determines its limited performance. Generally, the precision of seamless steel pipes is low: uneven wall thickness, low brightness inside and outside the tube, high cost of sizing, and there are pits and black spots on the inside and outside. It is not easy to remove; third, its detection and shaping must be processed off-line, so it reflects its superiority in high-pressure, high-strength, and mechanical structural materials. The types of stainless steel pipes: hot rolling and hot extrusion And cold drawn (rolled) stainless steel tubes, according to the metallographic structure of stainless steel, it can be divided into semi-ferritic and semi-martensitic stainless steel tubes, martensitic stainless steel tubes, austenitic stainless steel tubes, and austenitic-ferritic stainless steel tubes However, after the general stainless steel seamless steel pipe is used as an automobile oil pipe for a long time, micro-cracks will appear on the surface after the pressure is applied, the sealing performance and fracture resistance are poor, and the inner wall of the steel pipe is not smooth enough.