Laser cutting machine for cutting the difficulties of high temperature alloy

High temperature alloy because of its high hardness, high temperature resistance of the unique characteristics, so when using the laser cutting machine for cutting hard to ensure the accuracy of laser cutting, so high temperature aluminum alloy compared with those of general steel using laser cutting machine processing and what are the difficulties? 1. Work hardening tendency big such as not strengthen treatment of GH4169 was investigated about HRC37 matrix hardness, metal laser cutting machine after cutting surface will produce a 0. 3 mm or so of hardening layer, hardness is increased to about HRC47, hardening degree as high as 27%. And work hardening phenomenon on oxidation apex tap life is there will be a great impact, the boundary of this often have serious wear and tear. 2. Materials thermal conductivity of high temperature alloy cutting will produce large amounts of heat cutting by oxidation apex tap, under point under the cutting temperature is as high as 800 ~ 1000 ℃, under the effect of high temperature and large cutting force, it can produce plastic deformation, thus will lead to a cutting edge bonding and diffusion wear. 3. Big intensity of high temperature alloy cutting force is higher than steam turbine steel materials commonly used by more than 30%, under the cutting temperature above 600 ℃, the strength of the material nickel-based superalloy is still higher than ordinary steel materials. Not improved processing units of high temperature alloy cutting force in more than 4000 n/was, and ordinary alloy steel 2500 n/was only. 4. Wear large nickel base alloy ingredient for nickel and chromium, also have small amounts of other elements added: tungsten, molybdenum, tantalum, niobium, etc. , it is worth noting that the tantalum, niobium, tungsten, etc. Is also used to produce cemented carbide ( Or high speed steel) The main components of oxidation apex tap with the oxidation apex tap processing and high temperature alloy resulting diffusion wear and abrasive wear.