The curves of weight losses of the specimens
against wear distance in both abrasive and adhesive
wear tests are shown in Fig. 5. It is obvious that the
weight losses decreased after the remelting process
in both tests. With the remelting-chilling process,
the crystalline grains in the top layer became fine
and crystallites formed. The forming of metallic
compound matrix and fine crystalline grains lowered
the weight losses of the remelting-chilling layer.
Furthermore, a large amount of borites, such as CrB2 and Ni3B, which possess great hardness, precipitated
in the layer. As a result, the wear resistance was
improved. In abrasive wear tests, specimens remelted
with a plasma torch of 880 W possessed higher wear
resistance than those remelted with a plasma torch of
440 W. This is because the 880 W plasma torch
produced a thicker remelting-chilling layer than the
440 W plasma torch.
The curves of weight losses of the specimensagainst wear distance in both abrasive and adhesivewear tests are shown in Fig. 5. It is obvious that theweight losses decreased after the remelting processin both tests. With the remelting-chilling process,the crystalline grains in the top layer became fineand crystallites formed. The forming of metalliccompound matrix and fine crystalline grains loweredthe weight losses of the remelting-chilling layer.Furthermore, a large amount of borites, such as CrB2 and Ni3B, which possess great hardness, precipitatedin the layer. As a result, the wear resistance wasimproved. In abrasive wear tests, specimens remeltedwith a plasma torch of 880 W possessed higher wearresistance than those remelted with a plasma torch of440 W. This is because the 880 W plasma torchproduced a thicker remelting-chilling layer than the440 W plasma torch.
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