Continued Developments in Easily Carburizable High Speed Steel Alloys

Electrical Discharge Machining (EDM) is extensively used to manufacture different conductive materials, including difficult to machine materials with intricate profiles. Powder Mixed Electro-Discharge Machining (PMEDM) is a modern innovation in promoting the capabilities of conventional EDM. In this process, suitable materials in fine powder form are mixed in the dielectric fluid. An equal percentage of graphite and silicon carbide powders have been mixed together with the transformer oil and used as the dielectric media in this work. The aim of this study is to investigate the effect of some process parameters such as peak current, pulse-on time, and powder concentration of machining High-speed steel (HSS)/(M2) on the material removal rate (MRR), tool wear rate (TWR) and the surface roughness (Ra). Experiments have been designed and analyzed using Response Surface Methodology (RSM) approach by adopting a face-centered central composite design (FCCD). It is found that added graphite-silicon carbide mixing powder to the dielectric fluid enhanced the MRR and Ra as well as reduced the TWR at various conditions. Maximum MRR was (0.492 g/min) obtained at a peak current of (24 A), pulse on (100 µs), and powder concentration (10 g/l), minimum TWR was (0.00126 g/min) at (10 A, 100 µs, and 10 g/l), and better Ra was (3.51 µm) at (10 A, 50 µs, and 10 g/l).

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Enhancement of EDM Performance by Using Copper-Silver Composite Electrode

Engineering and Technology Journal ◽

10.30684/etj.v38i9a.1549 ◽

2020 ◽

Vol 38 (9A) ◽

pp. 1352-1358

Author(s):

Saad K. Shather ◽

Abbas A. Ibrahim ◽

Zainab H. Mohsein ◽

Omar H. Hassoon

Keyword(s):

Surface Roughness ◽

Material Removal Rate ◽

Material Removal ◽

High Speed ◽

Composite Electrode ◽

Removal Rate ◽

Pure Copper ◽

High Speed Steel ◽

Pulse On Time ◽

Pulse Off Time

Discharge Machining is a non-traditional machining technique and usually applied for hard metals and complex shapes that difficult to machining in the traditional cutting process. This process depends on different parameters that can affect the material removal rate and surface roughness. The electrode material is one of the important parameters in Electro –Discharge Machining (EDM). In this paper, the experimental work carried out by using a composite material electrode and the workpiece material from a high-speed steel plate. The cutting conditions: current (10 Amps, 12 Amps, 14 Amps), pulse on time (100 µs, 150 µs, 200 µs), pulse off time 25 µs, casting technique has been carried out to prepare the composite electrodes copper-sliver. The experimental results showed that Copper-Sliver (weight ratio70:30) gives better results than commonly electrode copper, Material Removal Rate (MRR) Copper-Sliver composite electrode reach to 0.225 gm/min higher than the pure Copper electrode. The lower value of the tool wear rate achieved with the composite electrode is 0.0001 gm/min. The surface roughness of the workpiece improved with a composite electrode compared with the pure electrode.

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MUSTANG-LC

Alloy Digest ◽

10.31399/asm.ad.ts0192 ◽

1967 ◽

Vol 16 (4) ◽

Keyword(s):

Physical Properties ◽

High Speed ◽

High Speed Steel ◽

Hot Extrusion ◽

Heat Treating ◽

Hot Forming ◽

Steel Company ◽

Extrusion Dies ◽

Die Life

Abstract Mustang-LC is a tungsten-molybdenum high-speed steel specially developed for hot work applications requiring long die life. It is recommended for hot forming and swaging dies, hot extrusion dies, hot punches, etc. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, machining, and joining. Filing Code: TS-192. Producer or source: Jessop Steel Company.

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UNS T12001

Alloy Digest ◽

10.31399/asm.ad.ts0495 ◽

1989 ◽

Vol 38 (1) ◽

Keyword(s):

Heat Treatment ◽

Physical Properties ◽

Tool Steel ◽

High Speed ◽

High Speed Steel ◽

Heat Treating ◽

General Purpose ◽

Steel Mills

Abstract UNS T12001 is a general-purpose, tungsten, high-speed steel containing nominally 18% tungsten, 4% chromium and 1% vanadium. It is suitable for practically all high-speed applications. This steel has been the standard of the industry for many years because of its cutting ability, ease of heat treatment and minimum tendency to decarburize. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on forming, heat treating, and machining. Filing Code: TS-495. Producer or source: Tool steel mills.

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UNS T11310

Alloy Digest ◽

10.31399/asm.ad.ts0490 ◽

1988 ◽

Vol 37 (5) ◽

Keyword(s):

Physical Properties ◽

Tensile Properties ◽

Tool Steel ◽

High Speed ◽

Cutting Tools ◽

High Speed Steel ◽

Heat Treating ◽

General Purpose ◽

Steel Mills

Abstract UNS No. T11310 is the high vanadium type of molybdenum high-speed steel. It is a deep-hardening steel and offers high cutting ability and excellent finishing properties. It is a general-purpose steel for cutting tools and is used in such applications as taps, lathe tools and reamers. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on heat treating and machining. Filing Code: TS-490. Producer or source: Tool steel mills.

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