Syringe Mould Company

When the particle size is 4060 mesh, the composite material has good erosion resistance and the particle size is easy to be dug out and fall off from the matrix.. Therefore, the matrix material is well protected and its 'supporting effect' is fully exerted. Therefore, the particles are cast tungsten carbide particles in ceramic particles. Under the action of casting infiltration force, the molten metal penetrates into the interstices of the particles, and transfers heat to the high-carbon ferrochrome particles and WC particles added to adjust the volume fraction.3

The composite material preparation process adopts the negative pressure casting infiltration process, that is, the composite layer particles with a little binder are spread on the surface of the mold (sand core). The particles in the iron-based surface wear-resistant composite material of this design improve the wear resistance of the material by preventing or reducing the micro-cutting and furrow deformation of the abrasive to the substrate during use. The erosion resistance test results are shown in Table 4. The austenite in the matrix is ​​formed by the amount of chro

mium exceeding Syringe Mould Company particles, high chromium cast iron with the same particle size, and HT300 as the base material.　　 is the organization of the interface between the composite layer and the substrate. 2 The structure of the surface composite material uses 0. When the WC particle size is 4060 mesh and the volume fraction is 36, its erosion resistance performance is good, which is 3 times that of high chromium cast iron. It can be seen from the above results that the composite The erosion and wear resistance of the materials is better than the contrast material high chromium cast iron. The main reasons why WC particle reinforced iron-based composites have good erosion resistance are: (1) As a reinforcing phase, the hardness and rigidity of WC particles are much higher than that of quartz sand, and they have better resistance to abrasive particles.3 to 0.

There is a transition zone in the bonding zone. Carbides precipitate to form a matrix of high chromium cast iron. 3. When the substrate is recessed, although the WC particles have a certain shadow effect on the substrate, However, because abrasive particles can enter the particle gap to cut, furrow and impact the matrix, the matrix is ​​severely worn, and the overall erosion of the composite material is not high. 

Megosztás a facebookon