WC-Co-Si-Ti nanometer coating and preparing method thereof

Abstract

The invention relates to a WC-Co-Si-Ti nanometer coating and a preparing method thereof. The WC-Co-Si-Ti nanometer coating comprises, by mass, 20-45 parts of Ni60A, 45-55 parts of TiO2, 0.5-2 parts of Al2O3 and 1-2 parts of trace elements. The preparing method comprises the following steps that firstly, a WC-Co-Si-Ti nanometer ball is prepared through a dry type pulverizing method; secondly, the nanometer ball prepared in the first step is mixed with ground B, Cr, Mn and C through a surface active agent protection method to prepare mixed powder; and thirdly, the nanometer powder prepared in the second step is utilized for preparing a WC-Co-Si-Ti nanometer welding layer on the surface of a workpiece through a plasma spraying technology. The prepared nanometer material is uniform in feature, particles are integral, and a good organization structure and good macroscopic properties are achieved; and hardness is high, abrasion resistance is good, the high-temperature oxidation resistance and other properties are good, the bonding strength is good, and the structure density is good.

Description

technical field

[0001] The invention relates to the technical field of thermal spraying materials, in particular to a WC-Co-Si-Ti nano coating and a preparation method thereof. Background technique

[0002] Thermal spraying is a surface strengthening technology and an important part of surface engineering technology. It has always been a new technology project that has been promoted in my country. It uses some kind of heat source (such as electric arc, plasma spraying or combustion flame, etc.) to heat powdery or filamentous metal or non-metallic materials to a molten or semi-molten state, and then sprays them at a certain speed by means of the flame itself or compressed air. A technique of depositing a pretreated substrate surface to form a surface coating with various functions.

[0003] With the advancement of spraying technology, the equipment is more advanced and the quality is getting higher and higher. The development of existing spraying materials is relatively lagg...