Explosive welding forming method of titanium and common low alloy steel composite seal head

Abstract

An explosive welding forming method of titanium and common low alloy steel composite seal heads includes: thermal treating common low alloy steel to form a seal head base layer placed on a sand base layer, placing a seal head composite layer made of titanium on the seal head base layer, allowing a hanging plate welded to the seal head composite layer to be placed on the support plate of the seal head base layer, and allowing the seal head composite layer and the seal head base layer to have a reasonable and even mounting gap; placing a buffer layer on the inner surface of the seal head composite layer and fitting the two, placing a special-shaped explosive bag on the inner surface of the buffer layer and fitting the two, detonating a primer and high explosives to allow the bottom of the seal head composite layer to be welded to the bottom of the seal head base layer, and gradually welding the other parts of the seal head composite layer under the action of main explosive; performing conventional machining. The method has the advantages that welding of the seal head base layer and the seal head composite layer is achieved through explosive welding, no thermal influence areas exist in a combining area, good connector performance is achieved, and excellent performance can be kept without strict protection of the seal head composite layer during explosive welding.

Description

technical field [0001] The invention belongs to the technical field of process equipment manufacturing, and in particular relates to an explosive welding forming method of a composite head made of titanium material and common low-alloy steel. Background technique [0002] Titanium and its alloys have many excellent properties, such as low density, high melting point, high specific strength, corrosion resistance, good high and low temperature performance, etc., so they are called "space metal" and "ocean metal". , chemical industry, metallurgy, electric power and other fields have more and more widely used. [0003] However, titanium can quickly absorb hydrogen above 300°C; quickly absorb oxygen above 600°C; quickly absorb nitrogen above 700°C; therefore, when titanium is processed above 650°C, if it cannot be effectively protected, it will cause titanium The plasticity and toughness of the material are reduced, and the corrosion resistance is reduced. It is advisable to us...

AI Technical Summary

Problems solved by technology

When the head of petrochemical equipment is made of titanium and ordinary low-alloy steel composite head, it can be directly formed by the composite plate of titanium cladding and ordinary low-alloy steel base. If the thickness of the ordinary low-alloy steel base is not very thick, It is often manufactured by cold forming at room temperature or medium temperature forming at 550-650°C; however, under normal circumstances, ordinary low-alloy steel bases generally require high-temperature heat treatment after forming, and a larger heat treatment furnace must be used for heat treatment in vacuum or inert gas protection. Responsible for high-temperature heat treatment will inevitably seriously affect the performance of the titanium clad layer; if the thickness of the ordinary low-alloy steel base layer is large, (using cold forming at room temperature, 550-650 °C forming may not be able to

Images