CN114807543A - 一种轴承铸铁毛坯的表面处理方法 - Google Patents
一种轴承铸铁毛坯的表面处理方法 Download PDFInfo
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- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 84
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000004381 surface treatment Methods 0.000 title claims abstract description 11
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 20
- 239000000956 alloy Substances 0.000 claims abstract description 20
- 238000005406 washing Methods 0.000 claims abstract description 18
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002253 acid Substances 0.000 claims abstract description 12
- 238000005266 casting Methods 0.000 claims abstract description 12
- 239000003513 alkali Substances 0.000 claims abstract description 11
- 238000005261 decarburization Methods 0.000 claims abstract description 11
- 238000005480 shot peening Methods 0.000 claims abstract description 7
- 238000005728 strengthening Methods 0.000 claims abstract description 7
- 238000004321 preservation Methods 0.000 claims abstract description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 238000004140 cleaning Methods 0.000 claims description 7
- 238000005554 pickling Methods 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 5
- 239000011159 matrix material Substances 0.000 abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910002804 graphite Inorganic materials 0.000 abstract description 8
- 239000010439 graphite Substances 0.000 abstract description 8
- 238000005422 blasting Methods 0.000 description 10
- 239000010410 layer Substances 0.000 description 8
- 239000002344 surface layer Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D3/00—Diffusion processes for extraction of non-metals; Furnaces therefor
- C21D3/02—Extraction of non-metals
- C21D3/04—Decarburising
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D5/00—Heat treatments of cast-iron
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D7/00—Modifying the physical properties of iron or steel by deformation
- C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
- C21D7/04—Modifying the physical properties of iron or steel by deformation by cold working of the surface
- C21D7/06—Modifying the physical properties of iron or steel by deformation by cold working of the surface by shot-peening or the like
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D2211/00—Microstructure comprising significant phases
- C21D2211/005—Ferrite
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Abstract
本发明公开了一种轴承铸铁毛坯的表面处理方法,其包括如下步骤:步骤一,将轴承铸铁毛坯置于温度为700~800℃的条件下保温2~5h,对轴承铸铁毛坯表面进行脱碳处理;步骤二,将脱碳处理后的轴承铸铁毛坯进行喷丸强化;步骤三,进行碱洗除油、酸洗除锈,得到满足白合金浇铸要求的轴承铸铁毛坯表面。其能够有效去除轴承铸铁毛坯表面的石墨,提高后续铸铁基体浇铸白合金的结合强度。
Description
技术领域
本发明涉及轴承制造技术领域,具体涉及轴承铸铁毛坯的表面处理方法。
背景技术
石油机械用压缩机的十字头、船用柴油机的推力块等滑动部件作为设备的关重件及摩擦副零件,一般采用铸铁基体表面浇铸白合金的制造工艺方法,使滑动表面形成良好的摩擦特性,满足了滑动运行时减摩和承载的工况需求。为保证部件的承载,则要求白合金轴承材料与铸铁基体具有良好的结合强度。但是由于铸铁基体含有大量的片状或球状石墨,石墨与白合金不发生任何反应,也不固溶,使铸铁基体的石墨与白合金结合部位由于未结合而形成气孔、疏松等,石墨的存在降低了白合金与基体的结合面积,使结合强度显著降低,不能满足部件的使用寿命要求。因此,为提高铸铁浇铸白合金轴承的使用寿命,提高铸铁基体浇铸白合金结合强度的制造工艺是一个亟待解决的技术问题。
发明内容
本发明的目的是提供一种轴承铸铁毛坯的表面处理方法,其能够有效去除轴承铸铁毛坯表面的石墨,提高后续铸铁基体浇铸白合金的结合强度。
本发明所述的轴承铸铁毛坯的表面处理方法,其包括如下步骤:
步骤一,将轴承铸铁毛坯置于温度为700~800℃的条件下保温2~5h,对轴承铸铁毛坯表面进行脱碳处理;
步骤二,将脱碳处理后的轴承铸铁毛坯进行喷丸强化;
步骤三,进行碱洗除油、酸洗除锈,得到满足白合金浇铸要求的轴承铸铁毛坯表面。
进一步,所述碱洗除油具体为:将轴承铸铁毛坯放置于浓度为8~10%的NaOH水溶液中,所述NaOH水溶液的温度为60~100℃,浸泡清洗去除轴承铸铁毛坯表面的油污。
进一步,所述酸洗除锈具体为:将轴承铸铁毛坯放置于浓度为8~10%的HCl水溶液中酸洗,去除轴承铸铁毛坯表面的锈迹。
本发明先对轴承铸铁毛坯表面进行脱碳处理,然后进行喷丸强化,去除轴承铸铁毛坯表面脱碳处理的氧化层,使得轴承铸铁毛坯表面凹点密集,全部呈金属本色即银灰色。并且脱碳层经喷丸强化后组织变得更为致密,使得轴承铸铁毛坯表层全部为铁素体组织,进而不再有片状石墨或球状石墨的影响,即可进入浇铸白合金的后续工序。轴承铸铁毛坯表层新鲜的铁素体组织能够与白合金中的锡发生反应生成化合物,形成良好的冶金结合,避免了结合部位的疏松、气孔缺陷,使铸铁基体浇铸白合金的结合强度得到充分保证。
具体实施方式
下面结合具体实施例对本申请作详细说明。
实施例一,一种轴承铸铁毛坯的表面处理方法,其包括如下步骤:
步骤一,将材质为HT250的轴承铸铁毛坯置于保温炉中,在温度为700℃的条件下保温5h,对轴承铸铁毛坯表面进行脱碳处理。
步骤二,将脱碳处理后的轴承铸铁毛坯放置在喷丸机中进行喷丸强化,喷丸至轴承铸铁毛坯表面氧化层全部去除,使得轴承铸铁毛坯表面凹点密集,全部呈金属本色即银灰色。并且脱碳层经喷丸强化后组织变得更为致密,使得轴承铸铁毛坯表层全部为铁素体组织,
步骤三,进行碱洗除油、酸洗除锈,所述碱洗除油具体为:将轴承铸铁毛坯放置于浓度为8%的NaOH水溶液中,所述NaOH水溶液的温度为60℃,浸泡清洗去除轴承铸铁毛坯表面的油污。所述酸洗除锈具体为:将轴承铸铁毛坯放置于浓度为8%的HCl水溶液中酸洗,去除轴承铸铁毛坯表面的锈迹,得到满足白合金浇铸要求的轴承铸铁毛坯表面。
实施例二,一种轴承铸铁毛坯的表面处理方法,其包括如下步骤:
步骤一,将材质为HT250轴承铸铁毛坯置于保温炉中,在温度为750℃的条件下保温3h,对轴承铸铁毛坯表面进行脱碳处理。
步骤二,将脱碳处理后的轴承铸铁毛坯放置在喷丸机中进行喷丸强化,喷丸至轴承铸铁毛坯表面氧化层全部去除,使得轴承铸铁毛坯表面凹点密集,全部呈金属本色即银灰色。并且脱碳层经喷丸强化后组织变得更为致密,使得轴承铸铁毛坯表层全部为铁素体组织,
步骤三,进行碱洗除油、酸洗除锈,所述碱洗除油具体为:将轴承铸铁毛坯放置于浓度为9%的NaOH水溶液中,所述NaOH水溶液的温度为80℃,浸泡清洗去除轴承铸铁毛坯表面的油污。所述酸洗除锈具体为:将轴承铸铁毛坯放置于浓度为9%的HCl水溶液中酸洗,去除轴承铸铁毛坯表面的锈迹,得到满足白合金浇铸要求的轴承铸铁毛坯表面。
实施例三,一种轴承铸铁毛坯的表面处理方法,其包括如下步骤:
步骤一,将材质为HT250轴承铸铁毛坯置于保温炉中,在温度为800℃的条件下保温2h,对轴承铸铁毛坯表面进行脱碳处理。
步骤二,将脱碳处理后的轴承铸铁毛坯放置在喷丸机中进行喷丸强化,喷丸至轴承铸铁毛坯表面氧化层全部去除,使得轴承铸铁毛坯表面凹点密集,全部呈金属本色即银灰色。并且脱碳层经喷丸强化后组织变得更为致密,使得轴承铸铁毛坯表层全部为铁素体组织,
步骤三,进行碱洗除油、酸洗除锈,所述碱洗除油具体为:将轴承铸铁毛坯放置于浓度为10%的NaOH水溶液中,所述NaOH水溶液的温度为100℃,浸泡清洗去除轴承铸铁毛坯表面的油污。所述酸洗除锈具体为:将轴承铸铁毛坯放置于浓度为10%的HCl水溶液中酸洗,去除轴承铸铁毛坯表面的锈迹,得到满足白合金浇铸要求的轴承铸铁毛坯表面。
将实施例一表面处理后的轴承铸铁毛坯作为铸铁基体,浇铸白合金为ZSnSb11Cu6,得到对应的轴承产品。按GB/T1174-92标准对得到的轴承产品进行超声波探伤,铸铁基体和白合金结合质量合格。按GB/T1174-92标准对得到的轴承产品进行结合强度定量检测,在万能材料试验机上,进行结合强度试验,多个测点的结合强度绝对值平均达到63.6N/mm2,常规表面处理的产品绝对结合强度值仅达到26.6N/mm2。制造的产品满足了石油机械、船用柴油机等设备的设计要求,结合强度等性能好,可应用在高可靠性要求的设备上。
以上所述仅为本申请的较佳实施例而已,并不用以限制本申请,凡在本申请的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本申请的保护范围之内。
Claims (3)
1.一种轴承铸铁毛坯的表面处理方法,其特征在于,包括如下步骤:
步骤一,将轴承铸铁毛坯置于温度为700~800℃的条件下保温2~5h,对轴承铸铁毛坯表面进行脱碳处理;
步骤二,将脱碳处理后的轴承铸铁毛坯进行喷丸强化;
步骤三,进行碱洗除油、酸洗除锈,得到满足白合金浇铸要求的轴承铸铁毛坯表面。
2.根据权利要求1所述的轴承铸铁毛坯的表面处理方法,其特征在于,所述碱洗除油具体为:将轴承铸铁毛坯放置于浓度为8~10%的NaOH水溶液中,所述NaOH水溶液的温度为60~100℃,浸泡清洗去除轴承铸铁毛坯表面的油污。
3.根据权利要求1或2所述的轴承铸铁毛坯的表面处理方法,其特征在于,所述酸洗除锈具体为:将轴承铸铁毛坯放置于浓度为8~10%的HCl水溶液中酸洗,去除轴承铸铁毛坯表面的锈迹。
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Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH02270933A (ja) * | 1989-04-13 | 1990-11-06 | Hitachi Metals Ltd | 高靭性球状黒鉛鋳物鋳物およびその製造方法 |
CN101225856A (zh) * | 2008-01-22 | 2008-07-23 | 重庆跃进机械厂 | 大功率低速柴油机高碳钢推力滑动轴承的制造工艺 |
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Publication number | Priority date | Publication date | Assignee | Title |
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JPH02270933A (ja) * | 1989-04-13 | 1990-11-06 | Hitachi Metals Ltd | 高靭性球状黒鉛鋳物鋳物およびその製造方法 |
CN101225856A (zh) * | 2008-01-22 | 2008-07-23 | 重庆跃进机械厂 | 大功率低速柴油机高碳钢推力滑动轴承的制造工艺 |
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