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锻造beplay全站app安卓加工时其热处理工艺是什么?

来源:http://www.jnhjgs.cn     发布时间:2020-07-06 17:57:48    点击:

  一、油淬后再回火,是典型的锻造beplay全站app安卓用钢热处理工艺。
  1、 Tempering after oil quenching is a typical heat treatment process for forging die steel.
  二、钢的淬火是将钢加热到临界温度Ac3(亚共析钢)或Ac1(过共析钢)以上温度,保温一段时间,使之整体或或者部分奥氏体化,然后以大于临界冷却速度的冷速快冷到Ms以下(或Ms附近等温)进行马氏体(或贝氏体)转变的热处理工艺。通常也将铝合金、铜合金、钛合金、钢化玻璃等材料的固溶处理或带有快速冷却过程的热处理工艺称为淬火。
  2、 Quenching of steel is a heat treatment process in which the steel is heated to the critical temperature AC3 (hypoeutectoid steel) or AC1 (hypereutectoid steel), holding for a period of time to make it whole or partially austenitized, and then rapidly cooled to below MS (or isothermal near MS) at a cooling rate greater than the critical cooling rate for martensite (or bainite) transformation. Generally, the solution treatment of aluminum alloy, copper alloy, titanium alloy, tempered glass and other materials or the heat treatment process with rapid cooling process is called quenching.
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  三、回火是将经过淬火的工件重新加热到低于下临界温度AC1(加热时珠光体向奥氏体转变的开始温度)的适当温度,保温一段时间后在空气或水、油等介质中冷却的金属热处理工艺。或将淬火后的合金工件加热到适当温度,保温若干时间,然后缓慢或快速冷却。一般用于减小或消除淬火钢件中的内应力,或者降低其硬度和强度,以提高其延性或韧性。淬火后的工件应及时回火,通过淬火和回火的相配合,才可以获得所需的力学性能。
  3、 Tempering is a metal heat treatment process in which the quenched workpiece is reheated to an appropriate temperature lower than the lower critical temperature AC1 (the starting temperature of pearlite to austenite transformation during heating), and then cooled in air, water, oil and other media after holding for a period of time. Or the quenched alloy workpiece is heated to a proper temperature, held for a certain time, and then cooled slowly or rapidly. It is generally used to reduce or eliminate the internal stress in quenched steel parts, or reduce its hardness and strength to improve its ductility or toughness. After quenching, the workpiece should be tempered in time, and the required mechanical properties can be obtained through the combination of quenching and tempering.
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