Definition of work-harden in English:

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work-harden

Pronunciation: /wərkˈhärdn/

verb

[with object] (often as noun work-hardening) Metallurgy
Toughen (a metal) by cold-working.
Example sentences
  • Repeated expansion and sizing work-hardens the case and overtime makes it less resilient.
  • The rest of the strength is generated by work-hardening.
  • Machining operations are normally limited to turning and milling because manganese steel work-hardens under load.

For editors and proofreaders

Syllabification: work-hard·en

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