发明名称 |
Rock drill product and method. |
摘要 |
A threaded rock drill element for percussive rock drilling includes a body forming a center axis and having a hardened thread. The thread includes thread crests and thread bottoms and a hardened zone having increased hardness. The hardened zone includes first and second hardened areas extending radially from a crest and bottom (valley), respectively, of the thread, to a boundary curve of the hardened zone. The boundary curve has convex portions extending along the thread crests, and concave portions extending along the thread bottoms. |
申请公布号 |
ZA200408784(B) |
申请公布日期 |
2005.09.13 |
申请号 |
ZA20040008784 |
申请日期 |
2004.10.29 |
申请人 |
SANDVIK INTELLECTUAL PROPERTY HB. |
发明人 |
ANN-CATHRIN HEDLUND;AGNE LUNDQUIST;GOERAN HAGELIN |
分类号 |
C21D1/10;C21D1/42;C21D9/22 |
主分类号 |
C21D1/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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