在避免烧穿的前提下增大焊接电流能够减小硬度、减少上贝氏体，从而降低氢致开裂敏感性。
The increase of weld current can reduce the hardness and the content of upper bainite, and lower the sensibility of hydrogen cracking of the joints.
对比研究了不同退火温度对贝氏体球铁辊环组织和硬度的影响，提出了贝氏体球铁辊环合适的退火温度。
The influences of different annealing temperature on the structure and hardness was compared and investigated. The proper annealing temperature for the bainite nodular iron roller ring was proposed.
研究结果表明，钒使贝氏体转变所要求的奥氏体化温度范围增大，并使贝氏体球铁的硬度提高。
The results show that the range of austenitizing temperature required for bainite hardening and the hardness of bainite ductile cast iron is increased as vanadium is added.
应用推荐