Bimetal composite pipe and production method thereof

Abstract

The invention provides a production method for a bimetal composite pipe. The production method for the bimetal composite pipe comprises the following steps: centrifugally casting an alloy solution containing wear-resistant metal to form an inner pipe; heating an outer pipe with preset length to be in an expanding state; and pushing at least one inner pipe into the outer pipe, wherein the outer pipe is shrunk after being cooled to fasten the inner pipe, and the outer pipe and the inner pipe form the bimetal composite pipe. The invention also provides the bimetal composite pipe. The bimetal composite pipe comprises the outer pipe and at least one inner pipe, wherein the inner pipe is pushed into the outer pipe when the outer pipe is expanded with heat and is fastened by the outer pipe after the outer pipe is cooled; and the inner pipe is formed by centrifugally casting the alloy solution containing the wear-resistant metal. According to the bimetal composite pipe and the production method thereof, the length of the bimetal composite pipe is not limited by the inner pipe; high wear resistance and compressive property are achieved; the chromium content is ideal; and the inner pipe has thinner pipe wall and is longer.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a bimetal composite pipe and a production method thereof. Background technique [0002] Concrete pump truck is a machine that uses pressure to continuously transport concrete along pipelines. It is more common in construction operations and consists of concrete pumps and delivery pipes. When conveying concrete, a concrete pump provides appropriate power, so that the concrete is sent to the destination through the conveying pipe under appropriate pressure. [0003] When conveying concrete, the flowing concrete continuously scours and wears the inner wall of the conveying pipe. When the conveyed concrete reaches a certain volume, the conveying pipe will fail due to the continuous wear of the concrete. Slow and increased construction costs. Therefore, in order to reduce the damage and failure of the delivery pipe caused by concrete scouring, it is necessary to improv...

AI Technical Summary

Problems solved by technology

However, the wear resistance and compression resistance of the welded part cannot be guaranteed, and the probability of damage is relatively high due to the continuous abrasion and erosion of the concrete, which affects the wear resistance and compression resistance of the entire pipeline and reduces the wear resistance of the entire pipeline. service life

[0007] Therefore, the production process of the bimetallic composite delivery pipe of the prior art has the technical defect that the length of the composite pipe produced is relatively short due to the limitation of the length of the inner pipe.

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