| 摘要 |
<p>The present invention prevents operating problems that occur because of gelation inside trochoid toothed gear pumps used in kneading systems for alginate impression materials. In a kneading system for alginate impression materials, a pump main body (housing) and rotors (outer rotor and inner rotor) for a trochoid toothed gear pump for base material paste are manufactured of austenite stainless steel manufactured by a molten steel manufacturing method or a powder sintering method and formed from 0.08% by mass or less C, 1.00% by mass or less Si, 2.00% by mass or less Mn, 0.045% by mass or less P, 0.030% by mass or less S, 10.00 - 14.00% by mass Ni, 16.00 - 18.00 % by mass Cr, 2.00 - 3.00% by mass Mo, and the remainder being Fe as chemical components.</p> |
