Technology Innovation for the Manual Laser Cladding of High-Alloy Tool Steels

This paper presents the development and successful application of an inductive preheating system running simultaneously with the manual laser cladding process in order to enable the repair of high-alloy tool steels having a highly limited weldability. In this study, the design and optimization of a suitable inductor as well as the analysis of the welding process were carried out by means of FE-simulation in order to generate material deposition without imperfections. Parameter variation studies were conducted while parallel modifying the generator power resulting in different preheating temperatures. These examinations showed that by using appropriate process parameters and an inductive preheating temperature of 200 ∘C, crack- and pore-free deposition layers could be produced on the commercial high-alloyed PM steel Elmax. This result can be explained by FE-simulation demonstrating that the cooling rate was halved in the weld and in the heat-affected zone. In conclusion, this study shows the high potential of the developed technical innovation for the manual laser cladding of high-performance tools.

CARTECH MICRO-MELT 440-XH

CarTech Micro-Melt 440-XH is an air-hardening, high-carbon, high chromium, corrosion resistant alloy tool steel that is produced by the powder metallurgy process. It can be considered as either a high hardness Type 440C martensitic stainless steel or a corrosion- resistant Type D2 alloy tool steel. CarTech Micro-Melt 440-XH possesses corrosion resistance equivalent to that of Type 440C martensitic stainless steel and can attain a maximum hardness of 64 HRC. In addition, the composition of CarTech Micro-Melt 440-XH has been balanced so that it can attain a minimum hardness of 60 HRC when air cooled from the hardening temperature. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, and machining. Filing Code: TS-819. Producer or source: Carpenter Technology Corporation.

METHODS FOR ESTIMATING THERMFISICAL PROPERTIES OF THE "TOOL - STEEL WORKPIECE" CONTACT PAIR AND THE POSSIBILITY OF THEIR USE IN CALCULATION OF THE PARAMETERS OF THE TURNING PROCESS

The analysis of methods for assessing the properties of contact pairs "hard alloy tool - steel workpiece" with the aim of improving the reliability of the choice of turning modes in generations of CNC systems equipped with technical intelligence. The models for calculating the cutting speed, the cutting force, the value of roughness Ra, have been corrected by introducing into their structure an additional informative value about the properties of each contact pair - the thermoEMF of the trial cut.

CARTECH AERMET-FOR-TOOLING

CarTech AerMet-for-Tooling is a low-carbon, cobalt-nickel-chromium-molybdenum, alloy tool steel that exhibits high strength and high hardness together with exceptional ductility and toughness. This alloy is designed for components that require a hardness of about 53–55 HRC along with very high toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-813. Producer or source: Carpenter Technology Corporation.