Method for vacuum smelting and casting for Mar-M246 alloy

A vacuum smelting and alloying technology, applied in the direction of casting mold, casting mold composition, casting molding equipment, etc., can solve the problems of uncontrolled pouring temperature, poor turbine consistency, low production efficiency, etc., to improve production efficiency and product consistency Effect

Inactive Publication Date: 2016-04-13
DALIAN HUASHENG PRECISION CASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the main production methods of supercharger turbines are fast melting furnaces and traditional vacuum melting furnaces. The production efficiency is low, and the performance of the turbines is greatly affected by human factors. out of control

Method used

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Embodiment Construction

[0019] A method for vacuum melting and casting Mar-M246 alloy, comprising the following steps:

[0020] ①Processing Mar-M246 alloy bar stock according to weight percentage, the weight percentage of the chemical composition of described Mar-M246 alloy is: C: 0.13~0.17%, Cr: 8~10%, Co: 9~11%, W: 9 ~11%, Mo:2.25~2.75%, Ta:1.25~1.75%, Al:5.25~5.75%, Ti:1.25~1.75%, B:0.01~0.02%, Zr:0.03~0.08%, Fe:≤1.0 %, Cu≤0.1%, Mn≤0.2%, S≤0.015%, the rest is Ni and unavoidable impurities;

[0021] ② Press the wax model, and combine the wax model and the refractory crucible through bonding wax;

[0022] ③The wax mold combined with the refractory crucible is coated with the slurry and then dewaxed to make the mold shell;

[0023] ④ Roasting the formwork;

[0024] ⑤Put the Mar-M246 alloy rod into a refractory crucible, and melt and cast the Mar-M246 alloy rod.

[0025] Further, in step ①, the alloy is first configured according to the weight percentage, melted, refined and cast into rods under v...

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Abstract

The invention discloses a method for vacuum smelting and casting for a Mar-M246 alloy. The method comprises the following steps: (1) processing Mar-M246 alloy bars, and the Mar-M246 alloy comprising the following chemical ingredients in percentage by weight: 0.13-0.17% of C, 8-10% of Cr, 9-11% of Co, 9-11% of W, 2.25-2.75% of Mo, 1.25-1.75% of Ta, 5.25-5.75% of Al, 1.25-1.75% of Ti, 0.01-0.02% of B, 0.03-0.08% of Zr, not greater than 1.0% of Fe, not greater than 0.1% of Cu, not greater than 0.2% of Mn, not greater than 0.015% of S, and balance Ni and inevitable impurities; (2) pressing a wax pattern, and combining the wax pattern with a refractory crucible through bonding wax; (3) smearing the wax pattern combined with the refractory crucible, with a paste, and then dewaxing to produce a formwork; (4) roasting the formwork; and (5) filling the refractory crucible with the Mar-M246 alloy bars, and smelting and casting the Mar-M246 alloy bars.

Description

technical field [0001] The invention relates to a method for casting Mar-M246 alloy, in particular to a method for vacuum melting and casting Mar-M246 alloy. Background technique [0002] In recent years, as an environmentally friendly product with high efficiency, energy saving and high technological content, turbocharger is the most economical "green" environmental protection technology. The proportion of gasoline engines using turbochargers will gradually increase. As a precipitation hardening nickel-based alloy, Mar-M246 has high durability and creep strength in the range of 650-1040°C and has certain oxidation resistance. The alloy has good casting performance and good welding performance, which can be compared with stainless steel. The alloy can be used in general vacuum casting process to cast castings with complex shapes and integrally cast turbines. The alloy has a certain resistance to salt spray corrosion, and can also resist the erosion of corrosive media encou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/05C22C1/02B22C9/04
CPCC22C19/057B22C9/04C22C1/023
Inventor 李壮徐令东闫安
Owner DALIAN HUASHENG PRECISION CASTING CO LTD
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