Cutting and machining characteristics of stainless steel for CNC machining parts Medical Equipment

Stainless steel lamp hardware processing non-standard parts turning and milling composite CNC lathe processing.

She is engaged in precision machinery core parts processing and manufacturing, mainly including communication equipment, photoelectric equipment, ceramic machinery, woodworking machinery, medical machinery, packaging machinery processing manufacturing, and sales, processing aluminum precision parts, non-standard precision parts, stainless steel precision parts, automotive precision parts, communication equipment precision parts, medical equipment precision parts, etc. High-precision parts can be completed simultaneously, turning and milling, without secondary processing, to ensure concentricity and precision.

Cutting and machining characteristics of stainless steel for CNC machining parts Medical Equipment.

The processing difficulty of stainless steel from easy to complex order is ferritic → martensitic → austenitic → austenitic plus ferritic → precipitation hardening. The cutting and machining characteristics of stainless steel are described as follows:

1. The trend of machining hardening is profound: the processing of stainless steel, a machining hardening tendency, especially austenitic and austenitic plus ferritic stainless steel, is particularly prominent. The hardness of the hardened layer can reach HV560, more than twice the hardness of the raw material, and the depth of the hardened layer can get 1/3 of the depth of cut or greater. The reason for the hardening is the good plasticity of stainless steel (§ > 35%), such as 0Cr18Ni9, 1Cr18Ni9Ti, 2Cr18Ni19, Cr18Mn10Ni5M03 elongation are greater than 40%, is 210-240% of 40Cr, is more than 150% of 45# steel, so in plastic deformation lattice distortion is severe, the strengthening factor is significant.

2. Small thermal conductivity: the thermal conductivity of stainless steel is small; that is, poor thermal conductivity such as austenitic stainless steel is only about 28% of the general steel, so the cutting process in the cutting can not be timely through the workpiece chip conduction out, and cause a large number of cutting heat concentrated near the cutting edge, so that the cutting temperature is significantly increased, such as 18-8 type stainless steel cutting temperature up to The cutting temperature of 45# steel is only 700~7500C.

3. Cutting force: high-temperature strength of stainless steel, high hardness, such as austenitic stainless steel, for example, its temperature up to 7000C, its comprehensive mechanical properties are still higher than the general structural steel, coupled with its plasticity, good toughness, more energy consumed in the cutting process, so that the cutting force increases, such as turning 1Cr18Ni19Ti unit cutting force than 45# steel unit cutting force of 25% higher.

Four chips are not easy to break, and it is easy to produce chip tumors: due to the toughness of stainless steel, plasticity is significant, so in the turning process, the chip is continuous, which not only affects the smooth operation, causing safety accidents but also has a processed surface. Stainless steel contains Cr, Ni, Ti, Mo, and other elements; these elements and other metals are new and robust, and they efficiently produce adhesion phenomena and the formation of chip tumors. Such as, the austenitic stainless steel Lang brittle zone occurs at about 2000C or lower temperature, while the carbon steel Lang brittle zone occurs at about 3000C, which means that cutting austenitic stainless steel chip tumor temperature is lower than that of carbon steel.