The multistage Technology for Heating Processing of the big ingot blank homogenization of composition of AQ80M magnesium alloys

The multistage Technology for Heating Processing of the big ingot blank homogenization of composition of AQ80M magnesium alloys

  • CN 107,022,689 A
  • Filed: 03/23/2017
  • Published: 08/08/2017
  • Est. Priority Date: 03/23/2017
  • Status: Active Application
First Claim
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1. one kind is applied to the multistage Technology for Heating Processing of the big ingot blank homogenization of composition of AQ80M magnesium alloys, it is characterised in that include successivelyFollowing steps:

  • A. electromagnetism semi-continuous casting:

    Put into high-purity magnesium-aluminum zinc ingot metal, MnCl successively in smelting furnace2In the middle of particle, Mg-RE, Mg-CaAlloy and high purity silver, fusion temperature are controlled at 650-800 DEG C;

    Skimmed wait after the fusing that feeds intake, melt bottom is passed through argon gas and enteredRow stirring refining 5-20min;

    Stood after refining and be cooled to 670-690 DEG C, be incubated 1-3h;

    Melt is pressed into electromagnetic crystallizer,Wait draw above the head of ingot melt solidification and crystallization and liquid level apart from crystallizer upper surface vertical height be 40-80mm when, start crystallizerInterior magnet coil starts casting machine and carries out vertical drawing ingot simultaneously, and in-furnace temperature is to be melted in 670-690 DEG C, shunting disk during stable castingTemperature is 645-665 DEG C, and it is 15-50mm/min to draw ingot speed degree, and cooling water flow is 25-42m3/ h, the electricity that crystallizer appliesMagnet rate is 10-20Hz, and low-frequency current is 100-120mA;

    A diameter of 300 ~ 650mm of Φ

    are obtained, length is 1500 ~ 3500mm'"'"'sThe big ingot blank of AQ80M magnesium alloys;

    B. the Ith grade homogenizes:

    AQ80M magnesium alloy ingot blanks are put into annealing furnace stage casing, fire door is closed and is warming up to 240 ~ 260 DEG C, literWarm 3 ~ 5 DEG C/min of speed, to temperature after be incubated 4 ~ 10h;

    C. the IIth grade homogenizes:

    Annealing furnace temperature rises to 410 ~ 420 DEG C, 2 ~ 3 DEG C/min of heating rate, to temperature after insulation 32 ~48h;

    D. cooling procedure:

    Annealing furnace stops being incubated and rising fire door, and ingot blank is cooled to 250 ~ 300 DEG C with stove, then ingot blank is pushed awayFlake hearth-tapping is air-cooled to room temperature.

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