Cobalt-chromium-molybdenum alloy smelting method capable of preventing remelting splashing

A cobalt-chromium-molybdenum alloy and remelting technology, which is applied in the direction of improving energy efficiency and process efficiency, can solve problems such as alloy composition and inhomogeneity of alloy liquid splashing, reduce metal liquid splashing, improve uniformity, and solve alloy The effect of uneven composition

Pending Publication Date: 2022-05-31
LUOYANG SUNRUI TI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of alloy liquid splashing and alloy composition inhomogeneity in the smelting process, the invention provides a cobalt-chromium-molybdenum alloy smelting method capable of preventing remelting spatter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 10Kg cobalt-chromium-molybdenum alloy ingot water-cooled copper crucible vacuum induction remelting casting casting.

[0042] The first step, ingot treatment: For a cobalt-chromium-molybdenum alloy ingot of φ80mm and a weight of 10kg, the surface is polished with a grinding wheel until the surface is bright.

[0043] The second step, pickling treatment: the pickling solution is prepared from water, nitric acid and hydrofluoric acid. The ratio of the three of them is as follows: water: nitric acid (65-68% nitric acid content): hydrofluoric acid (40% hydrofluoric acid content) = 6:3:2. In this ratio, 10kg of pickling solution is prepared in a rubber and plastic container, and 10Kg of the alloy material in step 1 is put into the pickling solution for 30 seconds, then taken out, and quickly rinsed with hot water at 100 degrees Celsius.

[0044] Step 3, cleaning treatment: use tap water to clean the alloy material after step 2 for 3 times to ensure that it is cleaned.

[0...

Embodiment 2

[0054] 10Kg cobalt-chromium-molybdenum alloy surplus material is recovered and remelted.

[0055] The first step, remaining material treatment: use grinding wheels to polish the surface of the gating system, material head and other remaining materials of about 10kg after casting the cobalt-chromium-molybdenum alloy casting until the surface is bright.

[0056] The second step, pickling treatment: the pickling solution is prepared from water, nitric acid and hydrofluoric acid. The ratio of the three of them is as follows: water: nitric acid (65-68% nitric acid content): hydrofluoric acid (40% hydrofluoric acid content) = 6:3:2. In this proportion, 10kg of pickling solution is prepared in a rubber and plastic container, and 10Kg of the remaining alloy material in step 1 is put into the pickling solution for 30 seconds, then taken out, and quickly rinsed with hot water at 100 degrees Celsius.

[0057] The third step, cleaning treatment: use tap water to clean up the remaining al...

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PUM

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Abstract

A cobalt-chromium-molybdenum alloy smelting method capable of preventing remelting splashing comprises the steps of raw material pretreatment, vacuumizing, induction preheating, argon partial pressure, intermittent smelting, pressurized smelting and blowing-out pouring, in the intermittent smelting process, by continuously adjusting the power of a power source, an alloy material is in a molten state that the outer side edge part is molten, and the center part is solid, and the alloy material is in a molten state; the lasting time of subsequent pressurized smelting can be shortened, and the possibility of molten metal splashing is reduced; in the pressurized smelting process, due to the action of argon backfilling pressure, liquid can be effectively prevented from splashing under vacuum negative pressure, and alloy liquid is stirred and turned to be in a component uniform state through the electromagnetic action in vacuum induction smelting. By designing and formulating reasonable smelting power, smelting time, argon backfilling pressure and backfilling time, the uniformity of alloy components can be improved under the condition of preventing alloy smelting splashing, and the conditions of alloy liquid splashing and non-uniform alloy components in the smelting process are solved.

Description

technical field [0001] The invention relates to the field of cobalt-chromium-molybdenum alloy smelting, in particular to a cobalt-chromium-molybdenum alloy smelting method capable of preventing remelting spatter. Background technique [0002] At present, the smelting and casting of cobalt-chromium-molybdenum alloy mainly adopts the method of induction melting of magnesia ceramic crucible to prepare alloy ingots and castings. It is easy to collapse and has a relatively short service life, which affects the use efficiency of equipment and the production cycle of products to a certain extent. Cobalt-chromium-molybdenum alloys contain volatile elements such as carbon, nitrogen, and manganese. The water-cooled copper crucible suspension smelting preparation technology is prone to severe metal splashes during the alloy smelting process, resulting in difficult control of the alloy composition and scrapped materials. Contents of the invention [0003] In order to solve the proble...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/00C22B9/16
CPCC22B9/16C22B9/006C22B9/003Y02P10/25
Inventor 李伟东刘茵琪齐辉曹恒李渤渤
Owner LUOYANG SUNRUI TI PRECISION CASTING
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