CN103590057B - A kind of acid washing method of aluminium-nickel base contained superalloy - Google Patents

A kind of acid washing method of aluminium-nickel base contained superalloy Download PDF

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Publication number
CN103590057B
CN103590057B CN201310560864.4A CN201310560864A CN103590057B CN 103590057 B CN103590057 B CN 103590057B CN 201310560864 A CN201310560864 A CN 201310560864A CN 103590057 B CN103590057 B CN 103590057B
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pickling
acid
nickel base
superalloy
aluminium
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CN103590057A (en
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郝文慧
罗刚
李阳
武敏
李华英
李莎
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Taiyuan Iron and Steel Group Co Ltd
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Taiyuan Iron and Steel Group Co Ltd
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Abstract

An acid washing method for aluminium-nickel base contained superalloy, is mainly used in removing aluminium-nickel base contained superalloy oxide skin, it is characterized in that the aluminium-nickel base contained superalloy pickle solution soak acid-cleaning 10 ~ 2.5 hours at 20 ~ 70 DEG C after by annealing ball blast; In described pickle solution, the concentration of each material is: nitric acid 190g/L ~ 280g/L, hydrofluoric acid 10g/L ~ 45g/L, hydrochloric acid 10g/L ~ 45g/L, hexamethylenetetramine 1 ~ 4g/L, and all the other are water.The present invention adopts a step acid wash, does not need reconstruction equipment; Pickling speed can be significantly improved, reduce environmental pollution; Pickled surface not easily produces local corrosion, ensures quality product.

Description

A kind of acid washing method of aluminium-nickel base contained superalloy
Technical field
The present invention is mainly used in removing aluminium-nickel base contained superalloy oxide skin, and special design is a kind of removes hot extrusion or hot rolling containing the technology of the nickel base superalloy oxide skin of aluminium, is specifically related to a kind of pickling of aluminium-nickel base contained superalloy.
Background technology
High temperature alloy is mainly used in aerospace field at first, due to its excellent performance such as high temperature resistant, corrosion-resistant, be applied to the industrial circles such as electric power, automobile, metallurgy, glass manufacture, nuclear power gradually, thus expand the Application Areas of high temperature alloy greatly.Along with the development of high temperature alloy, its market requirement is in and progressively expands and growth state.
Nickel base superalloy can form Cr in hot extrusion or course of hot rolling 2o 3, Ni-Cr-O spinel, the oxide compound such as NiO, wherein Cr 2o 3play main provide protection, and not easily react in oxidizing acid; Ni-Cr-O spinel is insoluble to conventional various acid, makes pickle solution be difficult to contact matrix metal.And can be formed containing the nickel base superalloy of aluminium with Al 2o 3be main internal oxidition, along crystal boundary distribution, inlay anchoring in the base, pickling difficulty is increased.
At present, the pickling both at home and abroad for nickel base superalloy adopts " combined type pickling " technique usually, namely before pickling, adds one pretreatment process, makes oxide skin become loose and easily removes.Conventional combined type pickling is mainly divided into three types: 1. sodium hydride process → pickling; 2. melting salt process → pickling; 3. alkaline permanganate process → pickling.Taiyuan Iron and Steel Co. is at present to produce stainless steel, and pickling mode is single formula pickling, does not possess pretreatment condition, causes nickel base superalloy pickling speed slow, is badly in need of improving acid washing method.
Summary of the invention
For the deficiencies in the prior art, the invention provides a kind of acid washing method of aluminium-nickel base contained superalloy, its objective is to make existing installation be applicable to produce nickel-base alloy, putting forward heavy alloyed production efficiency, saving production cost.
Technical scheme of the present invention is: a kind of acid washing method of aluminium-nickel base contained superalloy, comprises the steps:
(1) the aluminium-nickel base contained superalloy chemical pickling liquid after annealing ball blast is soaked 10 ~ 2.5 hours at 20 ~ 70 DEG C; Described alloy comprises precipitation strength type nickel base superalloy Inconel718, Inconel740H, solution strengthening type nickel base superalloy Inconel617 and similar to aluminium superalloy;
In described pickle solution, the concentration of each material is: nitric acid 190g/L ~ 280g/L, hydrofluoric acid 10g/L ~ 45g/L, hydrochloric acid 10g/L ~ 45g/L, hexamethylenetetramine 1 ~ 4g/L, and all the other are water.
(2) again the alloy nylon brush after pickling or roller brush are scrubbed clean, then wash, dry.
Pickle solution of the present invention removes aluminium-nickel base contained high-temperature alloy surface oxide skin within the scope of 20 ~ 70 DEG C, and the speed raising scale removal along with pickling temperature is accelerated.
The present invention adopts a step acid wash, does not use the pre-treatment such as sodium hydride, can produce on the basis of not reconstructing production line; Can pickling speed be significantly improved, reduce environmental pollution; Pickled surface not easily produces local corrosion, ensures quality product.
Embodiment
Describe the embodiment of the acid washing method of a kind of aluminium-nickel base contained superalloy of the present invention below in conjunction with embodiment in detail, but be not limited to following embodiment.
Embodiment one
The present embodiment is the pickling to Inconel617 hot extrusion hollow forging.
Directly immersed in pickle solution by Inconel617 hot extrusion hollow forging after annealing ball blast and carry out pickling, in pickle solution, the concentration of each material is: nitric acid 250g/L, hydrofluoric acid 35g/L, hydrochloric acid 35g/L, hexamethylenetetramine 2g/L, and all the other are water.Pickling temperature is 70 DEG C, and the pickling residence time is 2.5 hours; Scrub the waste effective nylon brush of the Inconel617 hot extrusion after pickling, then washing removing remained on surface acid solution, dries.After pickling, hollow forging surface scale is cleaned completely and occurs without local corrosion.
Embodiment two
The present embodiment is the pickling to Inconel617 hot extrusion hollow forging.
Directly immersed in pickle solution by Inconel617 hot extrusion hollow forging after annealing ball blast and carry out pickling, in pickle solution, the concentration of each material is: nitric acid 200g/L, hydrofluoric acid 20g/L, hydrochloric acid 45g/L, hexamethylenetetramine 2g/L, and all the other are water.Pickling temperature is 20 DEG C, and the pickling residence time is 10 hours; Scrub the waste effective nylon brush of the Inconel617 hot extrusion after pickling, then washing removing remained on surface acid solution, dries.After pickling, hollow forging surface scale is cleaned completely and occurs without local corrosion.
Embodiment three
The present embodiment is the pickling to Inconel718 hot-rolled sheet.
Directly entered in pickle solution by Inconel718 hot-rolled sheet after annealing ball blast and carry out pickling, in pickle solution, the concentration of each material is: nitric acid 230g/L, hydrofluoric acid 25g/L, hydrochloric acid 30g/L, hexamethylenetetramine 3g/L, and all the other are water.Pickling temperature is 50 DEG C, and the pickling residence time is 5 hours; Scrub the Inconel718 hot-rolled sheet roller brush after pickling, then washing removing remained on surface acid solution, dries.After pickling, surface of steel plate oxide skin is cleaned completely and occurs without local corrosion.
Embodiment four
The present embodiment is the pickling to Inconel740H hot extrusion hollow forging super austenitic stainless steel hot-rolled sheet.
Directly entered in pickle solution by Inconel740H hot extrusion hollow forging after annealing ball blast and carry out pickling, in pickle solution, the concentration of each material is: nitric acid 280g/L, hydrofluoric acid 45g/L, hydrochloric acid 30g/L, hexamethylenetetramine 4g/L, and all the other are water.Pickling temperature is 50 DEG C, and the pickling residence time is 5 hours; Scrub the waste effective nylon brush of the Inconel740H hot extrusion after pickling or roller brush, then washing removing remained on surface acid solution, dries.After pickling, hollow forging surface scale is cleaned completely and occurs without local corrosion.

Claims (2)

1. the acid washing method of a precipitation strength type nickel base superalloy Inconel718 hot-rolled sheet, it is characterized in that the Inconel718 hot-rolled sheet after by annealing ball blast directly enters in pickle solution and carry out pickling, in pickle solution, the concentration of each material is: nitric acid 230g/L, hydrofluoric acid 25g/L, hydrochloric acid 30g/L, hexamethylenetetramine 3g/L, all the other are water; Pickling temperature is 50 DEG C, and the pickling residence time is 5 hours; Scrub the Inconel718 hot-rolled sheet roller brush after pickling, then washing removing remained on surface acid solution, dries.
2. the acid washing method of a solution strengthening type nickel base superalloy Inconel617 hot extrusion hollow forging; it is characterized in that the Inconel617 hot extrusion hollow forging after by annealing ball blast directly immerses in pickle solution and carry out pickling; in pickle solution, the concentration of each material is: nitric acid 200g/L; hydrofluoric acid 20g/L; hydrochloric acid 45g/L; hexamethylenetetramine 2g/L, all the other are water; Pickling temperature is 20 DEG C, and the pickling residence time is 10 hours; Scrub the waste effective nylon brush of the Inconel617 hot extrusion after pickling, then washing removing remained on surface acid solution, dries.
CN201310560864.4A 2013-11-12 2013-11-12 A kind of acid washing method of aluminium-nickel base contained superalloy Active CN103590057B (en)

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CN107267989A (en) * 2016-04-08 2017-10-20 贵州黎阳航空动力有限公司 A kind of chemical solution for being used to remove high-temperature alloy surface aluminum silicon infiltration layer
CN106381499A (en) * 2016-10-26 2017-02-08 江苏省沙钢钢铁研究院有限公司 Acid pickling method of anti-corrosion steel bars
CN108760452B (en) * 2018-05-30 2019-05-14 山东大学 Nickel base superalloy γ ' phase show and quantitative evaluation method
CN111139488A (en) * 2020-03-03 2020-05-12 广东富行洗涤剂科技有限公司 Chemical demolding liquid for high-temperature alloy and demolding treatment method thereof
CN112962104A (en) * 2021-02-02 2021-06-15 乐普(北京)医疗器械股份有限公司 Method for removing laser processing slag on metal surface and application
CN113334256A (en) * 2021-06-11 2021-09-03 贵州永红航空机械有限责任公司 Method for cleaning nickel-based high-temperature alloy before welding

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CN100557084C (en) * 2007-04-02 2009-11-04 李青 Direct chromium stainless-steel pickling agent
CN102181874A (en) * 2011-03-31 2011-09-14 山西太钢不锈钢股份有限公司 Acid-washing method of stainless steel wire for welding

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