High-performance alloys make springs hot stuff
A
Harris Springs product story
Edited by the Engineeringtalk editorial team
Feb 14, 2002
Versatile design and manufacturing facilities at Harris Springs ensure that no matter how complex the spring configuration of how demanding the application, a solution can usually be provided.
The versatility of design and manufacturing facilities at Harris Springs ensures that no matter how complex the spring configuration of how demanding the application, a solution can usually be provided.
This also includes the manufacture of springs for use in extreme temperatures of 500C or more which demand the use of exotic materials.
Such springs typically find carbon brush applications in the aerospace and nuclear industries.
Springs are also provided for highly corrosive marine environments.
To provide this service, Harris sources material from Alloy Wire International, the leading UK wire company specialising in the production of high-performance alloys including nickel and cobalt alloys.
Inconel X750 is the principal alloy purchased by Harris in quantities of 1-10kg at a time, used to meet the need of companies such as Morganite Special Carbons and Castell Safety.
Reliability of supply is an essential element of the relationship between the two companies as Harris has to fulfil its own customer needs quickly.
The ability to satisfy demanding production schedules throughout the supply chain is critical.
The quality of the material is also essential and Alloy Wire International's ISO certification and CAA approval is vital.
The checking of the raw material through tensile strength tests, proof tests, elongation, hardness and post heat treatment tests is essential.
Then of course there are the additional tests of the finished spring made by Harris.
These include tests performed on computer controlled length monitoring and adjusting equipment which is attached to spring coiling machines and allow full SPC analysis to ISO 9002.
The system also features an automatic sorting system which rejects out of tolerance springs at source and provides 100% in tolerance delivery to the customer.
Inconel X750 is a precipitation hardened alloy for high temperature applications such as in gas turbines, jet engine parts, nuclear power plant and heat treating fixtures.
It is also highly resistant to chemical corrosion and oxidation, as well as resistance to chloride ion stress-corrosion cracking.
Concluding, Philip Harris said, "Reliability of supply and the quality of material supplied by Alloy Wire International combined with our own spring making expertise ensures that Harris Springs remains number one for exacting applications".
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