Dual-alloy cladding layer wear plate and preparation method

Abstract

A dual-alloy cladding layer wear plate and a preparation method relate to the field of wear plate of a concrete pumper. Bores of a wear plate matrix and inner rings of glasses are cladded with ferrous alloy by laser; and outer rings of the glasses are cladded with nickel tungsten alloy by laser. The ferrous alloy comprises chemical components of 0.40-0.70 wt% of C, 2.0-3.0 wt% of B, 20-24 wt% of Cr, 4-7 wt% of Ni, 1.8-3.0 wt% of Si and the balance of Fe. The nickel tungsten alloy comprises chemical components of 2.2-2.7 wt% of C, 10-13 wt% of Cr, 1.8-2.8 wt% of Si, 50-60 wt% of W, 1.5-2.4 wt%of B and the balance of Ni. In order to prolong a service life of the wear plate and according to failure characteristics of different working positions, different alloy materials are cladded by laser to reach the goal of saving precious metal materials and reducing processing cost.

Description

technical field [0001] The invention relates to a spectacle plate of a concrete pump truck and laser cladding surface technology, and belongs to the technical field of laser processing. Background technique [0002] The S-shaped pumping distribution valve is a key part of the concrete pump. It is a mechanism that connects the delivery cylinder and the delivery pipe and coordinates the actions of each component, which directly affects the performance of the concrete pump. The spectacle plate is an easy-wearing part in the S valve, which communicates with the concrete delivery cylinder. The moving part, the S tube, is driven by the swing cylinder to switch the concrete from one side of the concrete cylinder port to the other side of the concrete cylinder port. The cutting ring follows the S tube It moves against the spectacle plate and forms a switching friction pair with the spectacle plate. Since the working medium is concrete, the rapid swing of the cutting ring causes str...

AI Technical Summary

Problems solved by technology

Based on the above failure factors, the usage of spectacle panels is only 30,000m 3 left and right, far from meeting actual needs

[0004] Chinese patent 03114161.7 uses casting to complete the combination of the spectacle plate matrix and the hard alloy, but the hard alloy has a significant thermal shock during the casting process

Chinese patent 201010186989.1 uses nickel-coated diamond or cubic boron nitride composite coating to prepare spectacle plates and cutting rings, but the material cost is high

[0005] The above traditional conventional methods are still unsatisfactory, and the service life of the spectacle plate needs to be further improved

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