利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN104087737A 34CrNi3Mo钢长轴锻件的热处理方法 无效 - 撤回

34CrNi3Mo钢长轴锻件的热处理方法
摘要：
本发明公开了一种34CrNi3Mo钢长轴锻件的热处理方法，为了将34CrNi3Mo钢长轴锻件的抗拉强度控制在使用范围内，其工艺步骤为：将所述34CrNi3Mo长轴锻件加热至870℃±10℃，保温340～350分钟，空冷；再加热至650℃±10℃，保温400～410分钟，随炉冷却；再加热至860℃±10℃，保温340～350分钟，油冷；再加热至595℃±10℃，保温400～410分钟，随炉冷却；再加热至625℃±10℃，保温400～410分钟，随炉冷却至400℃，出炉空冷至室温；如果抗拉强度还是超出使用范围，则需要进行再次补充回火。该方法主要适用于长轴锻件的热处理。
摘要（英）：

The invention discloses a heat treatment method of a long-shaft forging made of steel 34CrNi3Mo, and aims to control the tensile strength of the long-shaft forging made of steel 34CrNi3Mo within an application range. The method comprises the following process steps: heating the long-shaft forging made of steel 34CrNi3Mo to 870+/-10 DEG C, carrying out heat preservation for 340 to 350 minutes and air cooling; reheating to 650+/-10 DEG C, carrying out heat preservation for 400 to 410 minutes and cooling along with a furnace; reheating to 860+/-10 DEG C, and carrying out heat preservation for 340 to 350 minutes and oil cooling; reheating to 595+/-10 DEG C, carrying out heat preservation for 400 to 410 minutes and cooling along with the furnace; reheating to 625+/-10 DEG C, carrying out heat preservation for 400 to 410 minutes and cooling along with the furnace to reach 400 DEG C; and discharging the long-shaft forging from the furnace and carrying out the air cooling until reaching a room temperature. If the tensile strength of the long-shaft forging also exceeds the application range, the complementary tempering on the long-shaft forging needs to be carried out again. The method is mainly suitable for the heat treatment of the long-shaft forging.

0/0