Ray Ranjan: Iron group transition metal-refractory metal-boron glassy alloys.. Allied Chem, July 11, 1979: EP0002923-A1 (15 worldwide citation)

The invention deals with glassy alloys consisting essentially of about 5 to 12 atom per cent boron, one of the members selected from the group of 20 to 60 atom per cent molybdenum and about 13 to 40 atom per cent tungsten and the balance essentially one of the group consisting of cobalt, iron and ni ...

Ray Ranjan, Polk Donald E, Giessen Bill C: Improved tool steels which contain boron and have been processed using a rapid solidification process and method. Marko Materials, September 21, 1983: GB2116207-A (11 worldwide citation)

Alloys having compositions similar to commercial tool steels, but modified by the addition of 0.1 to 1.5 wt% boron are subjected to a rapid solidification processing (RSP) technique, producing cooling rates between 10-10 DEG C/sec. The asquenced RSP ribbon or powder, consists of a single phase with ...

Ray Ranjan, Tanner Lee E: Apparatus for casting metal filaments.. Allied, July 7, 1982: EP0055342-A1 (9 worldwide citation)

An apparatus and method are disclosed for casting high temperature and or reactive metallic alloys. The apparatus has a tiltable cooled crucible (2) for containing the molten alloy. The crucible has a spout (8) for extracting the molten alloy (4). The alloy is cast on an advanceable chilled surface ...


Polk Donald E, Ray Ranjan, Davis Lance A: Alliage amorphe de resistance amelioree a la fragilisation lors dun traitement thermique et procede delaboration. Allied Chem, February 23, 1979: FR2398809-A1 (5 worldwide citation)

La présente invention concerne un aillage amorphe de résistance améliorée à la fragilisation lors d'un traitement thernique.

Hasegawa Ryusuke, Ray Ranjan, Tanner Lee E: Beryllium-containing iron-boron glassy magnetic alloys.. Allied Chem, October 17, 1979: EP0004546-A2 (2 worldwide citation)

{PG,1 Introduction of beryllium into iron-boron base glassy alloys improves the thermal stability while substantially retaining the saturation moment of the base alloy. The alloys of the invention consist essentially of about 10 to 18 atom percent boron, about 2 to 10 atom percent beryllium and abou ...

Ray Ranjan: Metal alloys for making alloys with ultra-fine uniformly dispersed crystalline phase.. Allied, January 5, 1983: EP0068545-A2 (2 worldwide citation)

Boron-containing transition metal alloys based on one or more of iron, cobalt and nickel, and containing at least two metal components, which are at least 50 percent amorphous. These amorphous alloys can be devitrified under specific heat-treatment conditions to provide alloys having an ultrafine cr ...

Ray Ranjan, Scott Donald W: Casting of alloys with isotropic graphite molds. Santoku America, February 25, 2004: EP1390167-A1

Methods for making various metallic alloys such as nickel, cobalt and/or iron based superalloys, stainless steel alloys, titanium alloys and titanium aluminide alloys into engineering components by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent casting ...

Ray Ranjan, Scott Donald: Centrifugal casting of nickel base superalloys with inproved surface quality, structural integrity and mechanical properties in isotropic graphite moduls under vacuum. Santoku America, May 6, 2004: EP1414604-A2

Methods for making various nickel based superalloys into engineering components such as rings, tubes and pipes by melting of the alloys in a vacuum or under a low partial pressure of inert gas and subsequent centrifugal casting of the melt in the graphite molds rotating along its own axis under vacu ...

Ray Ranjan: Chill casting of metal strip employing a molybdenum chill surface.. Allied, October 1, 1980: EP0016006-A1

In the process of making metal strip directly from the melt by impinging molten metal onto the flat surface (3) of a rapidly moving chill body (1), the useful life of the chill body surface is prolonged, and strip surface properties are improved, by using a chill body having a surface of molybdenum.

Click the thumbnails below to visualize the patent trend.