2013年10月7日星期一

Wear alloy saw major factor

A phase change alloy blades wear friction in certain high-speed cutting process, substrate or material at temperatures above the phase transition temperature , makes the alloy saw blade with accelerated wear , and thus lose cutting ability . Such as high speed steels 500-600 °, ordinary  masonry drill bits steel 100 °, alloy steels 300-350 °, 65 manganese steel 200 ° temperature inside will result in the matrix phase transitions.
2 , the alloy microstructure in the welding temperature or other factors in the destruction of high -density ultra- fine particles in the welding alloy cold and hot temperatures , or high temperature , resulting in thicker alloy crystal , alloy cracking, deformation of the matrix alloy strength reduction and abrasion resistance .
3 , tool wear, cutting angle design and material discrepancies due to different hardness and various types of plastic stone drill bits materials not targeted under the appropriate choice of alloy , and no matter according to the hardness of the cutting dry cutting angle of each side effect which reduces tool life .
4 , the oxidation of the alloy blade wear oxidation wear at 800 ° C or higher friction temperature, oxygen in the air and alloys of cobalt , tungsten carbide, titanium, tool wear due to oxidation occurs .
5, the impact of technology and precision grinding wear, alloy circular saw blades are precision cutting tools, any main and sub- edge blade with tape, face cutting straight face , or radial cutting rather than a cutting line, each one formed alloy cutting point or depth , and many other factors that reduce their effectiveness .
6 , diffusion wear diffusion is cutting discs a chemical wear, diffusion wear is at a high cutting tool and the workpiece between the mutual diffusion of alloying elements , the tool material physical and mechanical properties of reduced lead increased tool wear . Carbide, titanium carbide increased in the tantalum carbide or other additives can be added to improve the matrix alloy and the temperature of diffusion and thus improve tool wear resistance and heat resistance.
7 , adhesive wear in the cutting of plastic material , the cutting and the rake face after the cutting work viscosity, the tool surface or partially lower strength adhesive particles or the workpiece to be cut so that the tool with grinding brush wear.
8 , improper maintenance or improper operation caused by wear and tear , each cutting equipment, cutting feed rate is not the same , while the alloy saw blade is designed according to different cutting material various angles , with inappropriate will reduce its effectiveness.

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