Manufacturing method of CuNi90/10 alloy socket welding flange

Abstract

The invention discloses a manufacturing method of a CuNi90 / 10 alloy socket welding flange. The manufacturing method comprises the following steps that S1, die manufacturing is conducted, specifically,an outer die and a punch are manufactured according to the boundary dimension of the CuNi90 / 10 alloy socket welding flange; S2, heating and blank making are conducted, specifically, a CuNi90 / 10 alloyingot is heated to a forging temperature, the temperature is kept for a certain period of time according to the diameter of the ingot, and the ingot is forged on a forging hammer into a blank capableof being put into the outer die; S4, die preheating is conducted, specifically, the die manufactured in the step S1 is preheated in a heating furnace, and the blank manufactured in the step S2 is putinto the outer die for die pressing until a die cavity is filled with CuNi90 / 10 alloy; S5, punching is conducted, specifically, blind hole punching and through hole punching are sequentially conducted on the die-pressed CuNi90 / 10 alloy through the punch; and S6, cooling is conducted, specifically, after die forging, the CuNi90 / 10 alloy material is withdrawn from the die cavity, cooling treatmentis conducted on the CuNi90 / 10 alloy material, and then the CuNi90 / 10 alloy socket welding flange is obtained through turning. The manufacturing method is reasonable and effective, and has the advantages of raw material saving, small cutting amount, low production cost, high performance of manufactured products and the like.

Description

technical field [0001] The invention relates to the technical field of design and forging of petroleum pipeline connectors, in particular to a method for manufacturing CuNi90 / 10 alloy socket welding flanges. Background technique [0002] In shipbuilding and oil transportation, pipe connections are required. The commonly used pipe connection method is flange connection. Due to its highly corrosive environment, flanges are required to have high corrosion resistance and wear resistance; In the process, socket welding flanges are required. Cu-Ni-Fe alloy has high corrosion resistance and wear resistance, and is suitable for manufacturing shipbuilding and oil transportation socket welding flanges. [0003] Nowadays, there are two common manufacturing methods of socket welding flanges: 1) casting, which has a small amount of cutting and high material utilization rate, but has poor mechanical properties, poor air tightness of materials, and great potential safety hazards; 2) free ...

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Problems solved by technology

[0003] Nowadays, there are two common manufacturing methods for socket welding flanges: 1) casting, which has a small amount of cutting and high material utilization, but has poor mechanical properties, poor air tightness of materials, and great potential safety hazards; 2) free casting Ring forging, in this forging method, the diameter of the flange flange is used as the diameter of the ring, and the overall height is the height of the ring. This method wastes a lot of raw materials, requires a lot of turning processing, and the production cost is relatively high, and the core of the material is deformed. The amount is small, the surface deformation is large, and the performance consistency is poor

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