Effect of niobium and austenitizing temperature on the microstructures and properties of spray-deposited AISI M3:2 high speed steel

The microstructure and properties of niobium-containing AISI M3:2 high speed steels (HSSs) fabricated by spray forming and traditional casting have been investigated. The results show that fine and uniformly-distributed grains without macrosegregation appeared in the as-deposited HSSs that differ from those of as-cast HSSs. Nb mostly appears in primary MC carbides, whereas it contributes less to the formation of M6C carbides. The high stabilization of Nb-rich MC carbides can pin the grain boundaries during high-temperature austenitizing process, thus conferring a fine grains and raising the content of dissolved alloying elements. Enhanced precipitation strengthening and fine dispersion of NbC carbides throughout the matrix contribute to the high hardness and red hardness of Nb-containing HSS.

CRUCIBLE CPM REX 54 HS

Crucible CPM Rex 54 HS is a cobalt-bearing high speed tool steel that is produced by the proprietary Crucible Particle Metallurgy (CPM) process. It combines the wear properties of the popular high vanadium M4 grade with the red hardness of the cobalt-bearing M35/Crucible CPM Rex 45 HS grades. Crucible CPM Rex 54 HS may be used as an upgrade for improved red hardness over M3 or M4 without giving up the abrasion resistance, or as an upgrade for improved wear resistance over M35 or Crucible CPM Rex 45 HS without giving up the red hardness. This datasheet provides information on composition, physical properties, microstructure, hardness, and elasticity. It also includes information on wear resistance as well as heat treating and surface treatment. Filing Code: TS-818. Producer or source: Crucible Industries LLC.

Morphology, Hardness and Wear Properties of Plasma Cladding NiCrCu Coating on M2 High-Speed Steel

To improve the cutting performance, the red hardness and wear resistance of M2 high-speed steel, as well as expand the application field, in this work, a coating was fabricated via plasma cladding on M2 high-speed steel using Ni, Cr and Cu alloy elements as precursor materials. The distribution and composition of alloying elements, microhardness and wear resistance of the coating were studied. The results show that the NiCrCu cladding layer contains many types of carbides. The secondary hardening caused by the dispersion of carbides can significantly improve the hardness, red hardness and wear resistance of material. The hardness of cladding layer is above 950 HV, after holding at 600 °C for 4 h, the hardness is above 932 HV. The alloy elements are evenly distributed, but, due to the rapid solidification after the cladding, there are composition fluctuations in the longitudinal direction. The wear resistance of the cladding layer is excellent; the wear rate is reduced from 1.75 to 1.44 × 10−6 mm3 N−1 m−1 or less; and the wear mechanism is a combination of abrasive wear and adhesive wear.

BÖHLER S700

Böhler (or Boehler) S700 tungsten-molybdenum high-speed tool steel has good wear resistance and red hardness. This datasheet provides information on composition and physical properties. It also includes information on forming, heat treating, and machining. Filing Code: TS-778. Producer or source: Voestalpine BÖHLER Edelstahl GmbH & Co KG.

BÖHLER S705

Böhler (or Boehler) S705 is cobalt alloyed, tungsten-molybdenum high-speed steel possessing high hardness, excellent cutting properties, high red hardness, and good toughness. See also Alloy Digest TS-776, September 2019. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on forming and heat treating. Filing Code: TS-761. Producer or source: Voestalpine High Performance Metals Corporation.

BÖHLER S393 MICROCLEAN

Böhler (or Boehler) S393 is a high-speed steel made by the powder metallurgy process with excellent toughness and red hardness. This datasheet provides information on composition, physical properties, and hardness. It also includes information on surface qualities as well as forming, heat treating, machining, and powder metal forms. Filing Code: TS-751. Producer or source: Voestalpine High Performance Metals Corporation.

BÖHLER S200

Böhler (or Boehler) S200 is a high-speed steel with good toughness and red hardness. This datasheet provides information on composition, physical properties, hardness, and elasticity. It also includes information on surface qualities as well as forming, heat treating, and machining. Filing Code: TS-741. Producer or source: Böhler-Uddeholm North America.

Comparative on Wear Behavior of Nitrocarburized Low-Cost GDL-4 High Speed Steel to the Vane of Air Conditioning

The manufacture materials of air conditioner compressor vane require the properties of proficient red hardness and wear behavior. So the surface nitriding treatment is usually used in the production process of the high speed steel. Under 300N, the wear behavior of low-cost GDL-4 high speed steel, M2 high speed steel, and 11Cr17 stainless steel have been soft nitride processed with the same way was studied. The results show that the wear behavior performance of GDL-4 steel is much superior to M2 steel and 11Cr17 stainless steel after soft nitriding process and the surface hardness of nitro-carburized steel has an important influence on wear behavior.

Process Optimization and Properties of Laser Cladding High Speed Steel Coatings on Nodular Cast Iron

Rolls in the steel industry withstand very high loads, thermal cycling leading to thermal fatigue, and severe environmental. How to improve the wear resistance and elongate the service life of rolls matters a lot in reducing the consumption of rolls. In recent years, because of its better red-hardness and wear property, high speed steel (HSS) was used to manufacture the new type composite rolls. As a surface treatment technology, laser cladding can fabricate coating to improve the wear resistance of substrate. In this paper, the substrates for laser cladding were nodular cast iron rolls, Nd:YAG solid pulsed laser and continuous wave CO2laser were both used to explore the feasibility of preparation HSS coatings. The Nd:YAG laser cladding results that the coated layers combined metallurgically with the substrate with a lot of microcracks. The average microhardness up to 600 HV is about 2 times as high as that of the substrate. The CO2laser cladding results that: fully dense and crack free clad surfaces of high speed steel with an excellent metallurgical bonding were deposited. The average microhardness up to 900 HV is about 3 times as high as that of the substrate. The high-temperature (500 °C) wear rate is 40% of nodular cast iron’s in 30 min.