发明名称 ARTICOLI METALLICI CON SUPERFICI AL BORO RESISTENTI AD USURA PARTI COLARMENTE PER PUNTE PER PERFORA ZIONI GEOLOGICHE E RELATIVO PROCE DIMENTO DI FABBRICAZIONE
摘要 Disclosed herein are treatments for the manufacture of wear resistant steel surfaces, which are carburized, boronized, quenched and tempered for extreme surface hardness, with a strong, tough supporting base that minimizes fracturing of the brittle boronized case.
申请公布号 IT1017921(B) 申请公布日期 1977.08.10
申请号 IT19740026005 申请日期 1974.08.06
申请人 HUGHES TOOL CO 发明人
分类号 C23C8/00;E21B10/22;(IPC1-7):21B/ 主分类号 C23C8/00
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