Elektroschmelzwerk Kempten Gmbh

Plansee Se

Sinterstahl Gmbh

Wacker-chemie Gmbh

Pmg Fuessen Gmbh

Lorenz Sigl

Karl-Alexander Schwetz

Michael O'Sullivan

Günter Rau

Hubert Thaler

Thomas Kempf

Marco Brandner

Wolfgang Kraussler

Georg P Victor

Andreas Venskutonis

Dietrich Lange

Thomas Hosp

Helmut Kolker

Thomas Jungling

Rainer Oberacker

Fritz Thuemmler

Heinrich Wiedemann

Thomas Kalchschmid

A metal powder has a chromium content of at least 90 Ma %, a nanohardness according to EN ISO 14577-1 of &#x2264;4 GPa and/or a green strength measured according to ASTM B312-09 of at least 7 MPa at a compression pressure of 550 MPa.

Chromium metal powder

A powder or powder granulate includes a chromium content &#x3e;80 Ma %, which contains 2 to 20 Ma % iron, optionally up to 5 Ma % dopant, and optionally up to 2 Ma % oxygen, wherein the chromium-containing particles at least partially have pores. The powder displays significantly improved compression behavior and allows the production of sintered components having a very homogeneous distribution of the alloy elements.

Chromium-containing powder or granulated powder

A powder metallurgical component has a chromium content of at least 80% by weight and pores and/or oxide inclusions which are present in the component. The number per unit area of a sum of pores and oxide inclusions at a cut surface through the component in at least one region is at least 10,000 per mm.

Powdered metal component

A relatively economical process allows producing sintered shaped parts, such as sliding sleeves in motor vehicle transmissions. Open-pored undercut surfaces are formed at an internal toothing by hypocycloid milling of the part prior to its final hardening.

Process for mechanically forming undercuts on sintered shaped parts based on iron

A sliding collar has claw internal toothing and teeth projecting from at least one of the end surfaces. The individual teeth have lateral surfaces configured as lateral surfaces of a cone segment or as lateral surfaces of a cone segment and one or more truncated-cone segments. The novel geometry of the lateral surfaces which extend outward from the root circle results in both manufacturing technology and functional advantages over sliding collars with known tooth geometries.

Sliding collar produced by powder metallurgy

A sintered selector or sliding sleeve, or gear shift sleeve, has internal claw toothing. The individual teeth are delimited on their ends with secondary surfaces having ends that extend radially inward and outward from the root circle of the inner tooth surfaces. The novel geometry of the secondary surfaces extending radially outward from the root circle provide advantages in the manufacture of such selector sleeves by powder metallurgy, compared with those having prior art tooth geometries.

Sintered selector or sliding sleeve

The invention relates to a polycrystalline SiC shaped body, which consists of 96% by weight to 99.5% by weight of hard-material grains having a core/shell structure, 0 to 0.1% by weight free carbon, remainder a partially crystalline binder phase; having the following properties: density at least 99.5% of the theoretical density, dark green coloring of ground sections or polished surfaces through characteristic light absorption in the orange spectral region at 1.8 to 2.2 eV, resistivity of at least 10 ohm&middot;cm, and fracture toughness of at least 4.0 MPa.m , measured using the bridge method.

Liquid-phase-sintered SiC shaped bodies with improved fracture toughness and a high electric resistance

Pore-free sintered bodies on the basis of silicon carbide which are

A composite material includes boron carbide and titanium diboride in a volume ratio B.sub.4 C/TiB.sub.2 of from 90:10 to 10:90 parts and a proportion of elemental carbon greater than 2% by weight up to a maximum of 50% by weight, based on the boron carbide content. The composite material has a density greater than 92% TD, a hardness HK 0.1 greater than 2300, a four-point flexural strength greater than 400 MPa and a fracture toughness greater than 3.5 MPa.sqroot.m. The composite material is suitable for producing wear-resistant components or cutting tools.

Composite materials based on boron carbide, titanium diboride and

A process for producing shaped bodies of boron carbide, metal diboride and carbon, which includes

Process for producing bodies based on boron carbide by pressureless

Composite materials are provided based on titanium diboride and processes for their preparation. The composite materials contain

Composite materials based on titanium diboride

The invention relates to mixed sintered metal materials based on high-melting borides and nitrides and low-melting iron binder metals having the composition:

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Lechaschau, Austria

Lorenz Sigl