Crucible for titanium alloy smelting

A titanium alloy and crucible technology, which is applied in the field of refractory materials, can solve the problems of high cost of titanium alloy, uneven structure of titanium alloy, low alloy yield, etc., and achieve improved corrosion resistance, uniform thermal field, and organizational structure uniform effect

Inactive Publication Date: 2017-12-08
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most industries use consumable electrode electric arc furnaces with forced water-cooled copper crucibles to smelt titanium alloys, and cold crucible induction shell melting with forced water-cooled copper crucibles is also used, but there are the following problems: the thermal conductivity of copper is very high, pure copper The thermal conductivity is 401 W / (m·K), plus the forced cooling of water, so the use of water-cooled copper crucible to smelt titanium alloy will take away a lot of heat, resulting in uneven thermal field, resulting in uneven structure of titanium alloy and alloy shrinkage. Low yield, serious waste of energy, low efficiency, resulting in high cost of titanium alloys

Method used

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  • Crucible for titanium alloy smelting

Examples

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Effect test

Embodiment 1

[0014] A crucible for smelting titanium alloys, the weight percentage of ingredients is: 30% zirconium diboride, 40% fused calcium oxide stabilized zirconia, 20% yttrium oxide, 10% titanium nitride, and the binder is polyvinyl alcohol. The added amount is 5% of the total amount of raw materials. After weighing all the raw materials according to the proportion, add the binder, mix them evenly with a kneader, shape them with an isostatic press at 120MPa, dry at 200°C for 5 hours, then heat-treat at 1700°C and keep warm for 5 hours to obtain a finished crucible.

Embodiment 2

[0016] A crucible for smelting titanium alloys, the weight percentage of the ingredients is: 40% zirconium diboride, 30% fused calcium oxide stabilized zirconia, 20% yttrium oxide, 10% titanium nitride, and the binder is carboxymethyl fiber element, the additional addition is 5% of the total amount of raw materials. After weighing all the raw materials according to the proportion, add the binder, mix them evenly with a kneader, shape them with an isostatic press at 120MPa, dry at 200°C for 5 hours, then heat-treat at 1700°C and keep warm for 5 hours to obtain a finished crucible.

Embodiment 3

[0018] A crucible for smelting titanium alloys, the weight percentage of ingredients is: zirconium diboride 50%, fused calcium oxide stabilized zirconia 30%, yttrium oxide 15%, titanium nitride 5%, binder is carboxymethyl fiber element, the additional addition is 5% of the total amount of raw materials. After weighing all the raw materials according to the proportion, add the binder, mix them evenly with a kneader, shape them with an isostatic press at 120MPa, dry at 200°C for 5 hours, then heat-treat at 1700°C and keep warm for 5 hours to obtain a finished crucible.

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Abstract

The invention belongs to the technical field of fireproof materials and in particular relates to a crucible for titanium alloy smelting. The crucible for titanium alloy smelting is characterized by being prepared from the following raw materials in percentages by weight: 30-50% of zirconium diboride, 20-40% of electric smelted zirconium oxide, 10-20% of yttrium oxide and 5-10% of titanium nitride, wherein a binding agent accounting for 5% of the total weight of the raw materials is further added. According to the crucible provided by the invention, the energy consumption is reduced greatly, the alloy yield is increased, and meanwhile, molten metal is not polluted.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a crucible for melting titanium alloys. Background technique [0002] Titanium and its alloys have excellent properties, such as high specific strength, corrosion resistance, high temperature resistance, and good comprehensive process performance, etc., and are increasingly becoming attractive materials in the fields of modern industry and science and technology. It has been applied in many departments such as chemical industry, light industry, metallurgy, machinery and energy. Compared with stainless steel, copper alloy, and nickel-based alloys used in the same field, people have long believed that titanium and titanium alloys do not have cost advantages, thus delaying the speed and scope of promotion and application of titanium and titanium alloy materials. Titanium alloys cannot be widely used, mainly due to its high price. Among its cost components,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/48C04B35/58C04B35/622C22C1/02
CPCC04B35/48C04B35/58078C04B35/622C04B35/66C04B2235/3208C04B2235/3225C04B2235/3246C04B2235/3813C04B2235/3886C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/94C22C1/02
Inventor 刘国齐杨文刚李红霞钱凡于建宾马天飞马渭奎
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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