초록 ▼

The present invention is a metallic composite which is resistant to erosion and corrosion at the high temperatures and pressures which are encountered in gun tubes, including projectile launchers. This composite comprises a ductile layer of rhenium or a rhenium alloy containing more than 20 percent

The present invention is a metallic composite which is resistant to erosion and corrosion at the high temperatures and pressures which are encountered in gun tubes, including projectile launchers. This composite comprises a ductile layer of rhenium or a rhenium alloy containing more than 20 percent rhenium, and a layer of a lower cost high strength material such as steel, nickel, nickel alloy, cobalt, or cobalt alloy. A solid solution of the two metals is formed between the two layers making a metallurgical bond. The metallurgical bond may be enhanced through the use of a bond promoter having solubility with both metallic layers.

대표청구항 ▼

[ What is claimed is:] [1.] A high temperature, high pressure, erosion and corrosion resistant composite gun tube structure comprising:a radially inner first layer having an effective amount of rhenium establishing a high temperature, erosion and corrosion resistant metal, said first layer being sel

[ What is claimed is:] [1.] A high temperature, high pressure, erosion and corrosion resistant composite gun tube structure comprising:a radially inner first layer having an effective amount of rhenium establishing a high temperature, erosion and corrosion resistant metal, said first layer being selected from the group consisting of rhenium, tungsten rhenium alloys and molybdenum rhenium alloys, and having an elongation in excess of about 4 percent;a radially outer second layer of structural metal having a tensile strength greater than approximately 100,000 pounds per square inch; anda transition layer forming a metallurgical bond between said first and said second layers, said transition layer including an effective amount of a bond promoting metal to promote bonding between said first and second layers, said transition layer comprising a solid solution of the metals of said first and second layers and said metallurgical bond promoting metal, said high temperature, high pressure, erosion and corrosion resistant composite gun tube structure being capable of repeatedly withstanding internal temperatures in excess of about 2000 degrees Celsius.