CN103757584B - A kind of preparation method of rare earth catalytic cementation surface abrasion resistance Fe-W alloy - Google Patents
A kind of preparation method of rare earth catalytic cementation surface abrasion resistance Fe-W alloy Download PDFInfo
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- CN103757584B CN103757584B CN201410038504.2A CN201410038504A CN103757584B CN 103757584 B CN103757584 B CN 103757584B CN 201410038504 A CN201410038504 A CN 201410038504A CN 103757584 B CN103757584 B CN 103757584B
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- 229910001080 W alloy Inorganic materials 0.000 title claims abstract description 19
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 229910052761 rare earth metal Inorganic materials 0.000 title claims description 13
- 150000002910 rare earth metals Chemical class 0.000 title claims description 10
- 238000005299 abrasion Methods 0.000 title 1
- 230000003197 catalytic effect Effects 0.000 title 1
- 238000005255 carburizing Methods 0.000 claims abstract description 31
- 238000010791 quenching Methods 0.000 claims abstract description 6
- 230000000171 quenching effect Effects 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000008595 infiltration Effects 0.000 claims description 7
- 238000001764 infiltration Methods 0.000 claims description 7
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 229910002056 binary alloy Inorganic materials 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims description 3
- 239000012153 distilled water Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 229910001404 rare earth metal oxide Inorganic materials 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims description 2
- 229910021193 La 2 O 3 Inorganic materials 0.000 claims 1
- 229910045601 alloy Inorganic materials 0.000 abstract description 7
- 239000000956 alloy Substances 0.000 abstract description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 2
- 239000010431 corundum Substances 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum oxide Inorganic materials [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- KTUFCUMIWABKDW-UHFFFAOYSA-N oxo(oxolanthaniooxy)lanthanum Chemical compound O=[La]O[La]=O KTUFCUMIWABKDW-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
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Abstract
本发明公开了一种稀土催渗表面耐磨Fe‑W合金的制备方法，包括固体渗碳步骤，将Fe‑W二元合金置于含稀土的渗碳剂中，在890～930℃保温4～9小时进行渗碳处理，渗碳结束后取出渗碳件进行淬火处理。本发明所制备的合金既能保持整体的塑韧性和可加工性，又能具有较好的耐磨性和硬度。
The invention discloses a preparation method of a wear-resistant Fe-W alloy on a rare-earth-infiltrated surface. ~9 hours for carburizing treatment, after carburizing, take out the carburized parts for quenching treatment. The alloy prepared by the invention can not only maintain the overall plastic toughness and workability, but also have good wear resistance and hardness.
Description
技术领域 technical field
本发明涉及一种稀土催渗表面耐磨Fe-W合金的制备方法，属于合金钢和表面热处理领域。 The invention relates to a preparation method of a wear-resistant Fe-W alloy on a rare earth-promoted infiltration surface, belonging to the field of alloy steel and surface heat treatment.
背景技术 Background technique
钢铁材料在成分设计中，为了达到较高的耐磨性和硬度，通常会加入C、W和Cr等元素，通过形成碳化物、固溶强化等手段达到强化的目的。 In the composition design of steel materials, in order to achieve higher wear resistance and hardness, elements such as C, W and Cr are usually added, and the purpose of strengthening is achieved by forming carbides and solid solution strengthening.
然而，随着硬度的提高，材料的可加工性也变差。在有些应用场合，仅需要部件的某些表面的硬度和耐磨性提高，与此同时要求部件的整体保持较好的塑韧性。 However, as the hardness increases, the machinability of the material also deteriorates. In some applications, it is only necessary to increase the hardness and wear resistance of some surfaces of the component, while at the same time, it is required to maintain good plasticity and toughness of the component as a whole.
为满足以上需求，有必要开发一种合金，既能保持材料整体的塑韧性和可加工性，又能具有较好的耐磨性和硬度。 In order to meet the above requirements, it is necessary to develop an alloy that can not only maintain the overall plasticity, toughness and machinability of the material, but also have good wear resistance and hardness.
含W铁基二元合金造价低廉，且塑韧性好，渗碳后会在表层形成Fe3C和WC，使表面的硬度和耐磨性大大增加，然而在渗碳后，其表层的渗碳层硬度梯度较大，且渗碳耗时较长。 The W-containing iron-based binary alloy is cheap and has good plasticity and toughness. After carburizing, Fe 3 C and WC will be formed on the surface, which greatly increases the hardness and wear resistance of the surface. However, after carburizing, the carburizing of the surface The hardness gradient of the layer is large, and the carburization takes a long time.
发明内容 Contents of the invention
本发明需要解决的技术问题就在于克服现有技术的缺陷，提供一种稀土催渗表面耐磨Fe-W合金的制备方法，它制备的合金既能保持整体的塑韧性和可加工性，又能具有较好的耐磨性和硬度。 The technical problem to be solved in the present invention is to overcome the defects of the prior art and provide a method for preparing a wear-resistant Fe-W alloy on the surface of rare earth infiltration. The alloy prepared by it can not only maintain the overall plastic toughness and workability, but also Can have good wear resistance and hardness.
为解决上述问题，本发明采用如下技术方案： In order to solve the above problems, the present invention adopts the following technical solutions:
本发明提供了一种稀土催渗表面耐磨Fe-W合金的制备方法，包括固体渗碳步骤，将Fe-W二元合金置于含稀土的渗碳剂中，在890～930℃保温4～9小时进行渗碳处理，渗碳结束后取出渗碳件进行淬火处理。 The invention provides a preparation method of rare earth catalyzed surface wear-resistant Fe-W alloy, which includes a solid carburizing step, placing the Fe-W binary alloy in a carburizing agent containing rare earth, and keeping it warm at 890-930°C for 4 ~9 hours for carburizing treatment, after carburizing, take out the carburized parts for quenching treatment.
本发明中，Fe-W合金化学成分的质量百分比为：W4.3～6.0%，余量为Fe。 In the present invention, the mass percentage of the chemical composition of the Fe-W alloy is: W4.3-6.0%, and the balance is Fe.
本发明，Fe-W合金在埋入渗碳剂前依次用240#、800#和1200#水砂纸将表面打磨光亮，并在蒸馏水中用超声清洗后吹干。 In the present invention, before embedding the carburizing agent, the surface of the Fe-W alloy is polished with 240#, 800# and 1200# water sandpaper in sequence, and then cleaned with ultrasonic waves in distilled water and then blown dry.
本发明中，渗碳剂成分的质量份配比为：木炭55～75份，碳化硅5～10份，稀土氧化物CeO2或La2O3 3～11份，和碳酸钡8～12份。 In the present invention, the mass ratio of the carburizing agent components is: 55-75 parts of charcoal, 5-10 parts of silicon carbide, 3-11 parts of rare earth oxide CeO2 or La2O3 , and 8-12 parts of barium carbonate .
本发明中，在渗碳前将渗碳炉预热至850℃，再将装好渗碳剂和Fe-W合金的密封箱体放入渗碳炉5分钟后，将炉温升至890～930℃后保温4～9小时。 In the present invention, the carburizing furnace is preheated to 850°C before carburizing, and then the sealed box containing the carburizing agent and Fe-W alloy is put into the carburizing furnace for 5 minutes, and the furnace temperature is raised to 890-800°C. Keep warm at 930°C for 4 to 9 hours.
本发明中，淬火所用介质为水。 In the present invention, the medium used for quenching is water.
稀土元素具有特殊的化学活性，在渗碳剂中加入稀土元素后，可以加快组分的分解速度并净化金属表面，可以显著提高渗透速度，同时可以提高渗层的耐磨性，改善渗层的组织，降低其脆性。 Rare earth elements have special chemical activity. Adding rare earth elements to the carburizing agent can speed up the decomposition rate of the components and purify the metal surface, which can significantly increase the penetration rate, and at the same time improve the wear resistance of the carburized layer and improve the wear resistance of the carburized layer. tissue, reducing its fragility.
因而，本发明的有益效果在于：所用的Fe-W合金成分简单，稀土元素的加入，有效的缩短了渗碳时间，并能增加渗碳层深度，降低渗碳层硬度梯度，并使渗碳层组织细化，碳化物弥散度增加，在保持高硬度的同时具有较好的韧性。 Therefore, the beneficial effects of the present invention are: the Fe-W alloy used is simple in composition, and the addition of rare earth elements effectively shortens the carburizing time, increases the depth of the carburized layer, reduces the hardness gradient of the carburized layer, and makes the carburized layer The layer structure is refined, the carbide dispersion is increased, and it has good toughness while maintaining high hardness.
附图说明 Description of drawings
图1为 Fe-5.5W合金在910℃渗碳4小时的纵向截面金相组织。 Figure 1 shows the metallographic structure of the longitudinal section of the Fe-5.5W alloy carburized at 910°C for 4 hours.
图2为 Fe-5.5W合金在910℃渗碳4小时的纵向截面显微硬度变化。 Figure 2 shows the microhardness change of the longitudinal section of the Fe-5.5W alloy carburized at 910°C for 4 hours.
具体实施方式 detailed description
实施例Example 11
Fe-W合金成分质量百分比为：W5.5%，Fe94.5%。渗碳剂成分质量百分比为：木炭75%，碳化硅10，CeO2 5%，碳酸钡10%。将Fe-W合金试样用线切割机制成20×20×50mm试样，依次用240#、800#和1200#水砂纸打磨光亮，在蒸馏水中用超声清洗后吹干。在刚玉坩埚底部铺上20mm厚的渗碳剂，放入制作好的试样，并使试样距离刚玉坩埚壁大于20mm，之后用渗碳剂填满坩埚内剩余空间并压实，将坩埚盖与坩埚盖合后用高温密封胶，在此过程中保证坩埚内部空间充满压实的渗碳剂。将高温炉温度加热至850℃后保温，放入密封好的坩埚，5分钟后升温至910℃，保温4小时后取出坩埚，将试样放入水中淬火。 The mass percentage of Fe-W alloy composition is: W5.5%, Fe94.5%. The mass percentage of the carburizing agent is: 75% charcoal, 10% silicon carbide, 5% CeO 2 , and 10% barium carbonate. The Fe-W alloy sample was made into a 20×20×50mm sample with a wire cutting machine, polished with 240#, 800# and 1200# water sandpaper in turn, cleaned with ultrasonic waves in distilled water, and then dried. Spread a 20mm thick carburizing agent on the bottom of the corundum crucible, put in the prepared sample, and make the sample distance from the corundum crucible wall greater than 20mm, then fill the remaining space in the crucible with carburizing agent and compact it, and cover the crucible After the crucible is closed, a high-temperature sealant is used to ensure that the inner space of the crucible is filled with compacted carburizing agent during the process. Heat the temperature of the high-temperature furnace to 850°C and keep it warm, put it into a sealed crucible, raise the temperature to 910°C after 5 minutes, take out the crucible after keeping it warm for 4 hours, and put the sample into water to quench.
图1为 Fe-5.5W合金在910℃渗碳4小时的纵向截面金相组织。图2为 Fe-5.5W合金在910℃渗碳4小时的纵向截面显微硬度变化。 Figure 1 shows the metallographic structure of the longitudinal section of the Fe-5.5W alloy carburized at 910°C for 4 hours. Figure 2 shows the microhardness change of the longitudinal section of the Fe-5.5W alloy carburized at 910°C for 4 hours.
最后应说明的是：显然，上述实施例仅仅是为清楚地说明本发明所作的举例，而并非对实施方式的限定。对于所属领域的普通技术人员来说，在上述说明的基础上还可以做出其它不同形式的变化或变动。这里无需也无法对所有的实施方式予以穷举。而由此所引申出的显而易见的变化或变动仍处于本发明的保护范围之中。 Finally, it should be noted that obviously, the above-mentioned embodiments are only examples for clearly illustrating the present invention, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or variations derived therefrom are still within the protection scope of the present invention.
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Citations (3)
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| GB471792A (en) * | 1936-01-09 | 1937-09-09 | Follsain Syndicate Ltd | Improvements in processes for the production of metal carbides |
| CN1036232A (en) * | 1989-03-04 | 1989-10-11 | 国家机械工业委员会武汉材料保护研究所 | A kind of complex carburizer |
| CN1061443A (en) * | 1990-11-13 | 1992-05-27 | 哈尔滨工业大学 | Rare earth low temperature high concentration gas carburizing method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB471792A (en) * | 1936-01-09 | 1937-09-09 | Follsain Syndicate Ltd | Improvements in processes for the production of metal carbides |
| CN1036232A (en) * | 1989-03-04 | 1989-10-11 | 国家机械工业委员会武汉材料保护研究所 | A kind of complex carburizer |
| CN1061443A (en) * | 1990-11-13 | 1992-05-27 | 哈尔滨工业大学 | Rare earth low temperature high concentration gas carburizing method |
Non-Patent Citations (3)
| Title |
|---|
| Study on Formation Mechanism of WC in Carburized Layer of Fe-1.57W Binary Alloy;Junyou Liu et al.;《Advanced Materials Research》;20101027;第154-155卷;第11-12页，"Solid Carburized Mechanism","Experimental Procedure" * |
| 稀土催渗剂的配制及其催渗机理的探讨;李彬;《热处理》;20011231;第16卷(第4期);第17页左栏 * |
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