| 摘要 |
<p>The present invention relates to an element for percussive rock drilling with new and improved fatigue properties and production economy properties as well as to a method for manufacturing the element. The element comprises at least one connection means and a flush channel. At least the connection means is made in a steel with a structure comprising primarily martensite. The steel comprises at least one intentionally added substance intended to impede grain growth during heat-treatment.</p> |
