With the development of aerospace modernization machinery industry, aerospace industry, chemical industry and electronic industry, there are various high-level requirements for the performance of product parts and materials. For example: high temperature resistance, high stress resistance, corrosion resistance, wear resistance, high conductivity and so on. The types used are more and more extensive, such as: ordinary carbon structural steels, high-strength steels, ultrahigh-strength alloy structural steels, high manganese steels, and stainless steels; and ferrous metals, titanium alloys, copper alloys, aluminum alloys, and Other non-ferrous metals and so on. Medical Equipment Accessories,Medical Infusion Holder Parts,316L Medical Infusion Holder Parts,304 Medical Infusion Holder Parts Dongguan New Decoration Material Technology Co., Ltd. , https://www.xsjmim.com
The characteristics of the new engineering material can generally increase the cutting force in the cutting process, increase the cutting temperature, and reduce the tool life; sometimes the quality of the processed surface is deteriorated and the chips are difficult to control; finally, the processing efficiency and processing quality are achieved. reduce. It is very difficult to process. Mainly reflected in the following characteristics of the new engineering materials: 1, high hardness; 2, high strength; 3, high plasticity and high toughness; 4, low plasticity and high brittleness; 5, low thermal conductivity; 6, there are microscopic hard spots Or hard inclusions; 7, lively chemical properties.
Characteristics of high-strength and ultra-high-strength steels: Structural steels with tempered σs> 1 000 MPa or σb> 1 100 MPa are called high-strength steels. Structural steels with σs>1 200 MPa or σb>1 500 MPa after quenching and tempering are called ultra-high strength steels. In this kind of steel, where the carbon content is between 0.30% and 0.50%, and the total amount of alloying elements does not exceed 6%, it is a low-alloy high-strength, ultra-high-strength steel that is used most in production.
Compared with ordinary carbon structural steels, high-strength, ultra-high-strength steels have higher hardness and strength (about 1 or more times higher than 45 steels). The impact value is larger and the thermal conductivity is lower, so the cutting force is higher. Larger, higher cutting temperature. When processing high-strength, ultra-high-strength steels, the same tool materials as ordinary carbon steels can be selected.
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The reason why high-strength steel is difficult to process