Free-machining steels containing tin, antimony, and/or arsenic
作者： Anthony J. Deardo , C. Isaac Garcia
DOI:
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摘要: The invention relates to free-machining steels which do not rely on lead for enhancing machinability. These employ concentrations of tin, arsenic, and/or antimony at ferrite grain boundaries replicate a role in This is cause an embrittlement the localized cutting zone temperatures by changing fracture mode from transgranular intergranular those temperatures. use steel's permits machinability-enhancing effect be obtained while employing bulk contents below levels hot tearing becomes problematic. improves over lead-bearing, that produced concentrating both controllable and reversible. also methods producing described products processes.
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