JPS634094A - Boriding treatment of iron and steel - Google Patents
Boriding treatment of iron and steelInfo
- Publication number
- JPS634094A JPS634094A JP14621786A JP14621786A JPS634094A JP S634094 A JPS634094 A JP S634094A JP 14621786 A JP14621786 A JP 14621786A JP 14621786 A JP14621786 A JP 14621786A JP S634094 A JPS634094 A JP S634094A
- Authority
- JP
- Japan
- Prior art keywords
- salt
- treatment
- iron
- steel
- molten salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 16
- 239000010959 steel Substances 0.000 title claims abstract description 16
- 150000003839 salts Chemical class 0.000 claims abstract description 50
- 238000000034 method Methods 0.000 claims abstract description 34
- 238000002844 melting Methods 0.000 claims abstract description 13
- 230000008018 melting Effects 0.000 claims abstract description 13
- 238000007654 immersion Methods 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 10
- 239000012535 impurity Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 8
- FUJCRWPEOMXPAD-UHFFFAOYSA-N Li2O Inorganic materials [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 abstract description 4
- XUCJHNOBJLKZNU-UHFFFAOYSA-M dilithium;hydroxide Chemical compound [Li+].[Li+].[OH-] XUCJHNOBJLKZNU-UHFFFAOYSA-M 0.000 abstract description 4
- KKCBUQHMOMHUOY-UHFFFAOYSA-N Na2O Inorganic materials [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 abstract description 3
- 238000007598 dipping method Methods 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 12
- 229910052796 boron Inorganic materials 0.000 description 11
- 239000010410 layer Substances 0.000 description 8
- 238000012545 processing Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- 101100348017 Drosophila melanogaster Nazo gene Proteins 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 2
- 229910052580 B4C Inorganic materials 0.000 description 1
- 241000566113 Branta sandvicensis Species 0.000 description 1
- 229910001323 Li2O2 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 235000019270 ammonium chloride Nutrition 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、鉄および鋼の浸硼処理に関し、特に低温での
浸硼処理を可能とし、寸法変化、硬さ変化が少なくかつ
浸硼処理後、被処理物に付着する浸硼剤の洗浄除去が容
易な鉄および鋼の浸硼処理方法に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to the borening treatment of iron and steel, and in particular enables the borening treatment at low temperatures, reduces dimensional changes and hardness changes, and improves the hardness of iron and steel. The present invention also relates to a method for impregnating iron and steel in which it is easy to wash and remove the impregnating agent adhering to the object to be treated.
（従来の技術）
鉄および鋼の表面に硼素を浸硼させ、表面層の硬さを高
くして耐摩耗性を向上し、また緻密なボロン化層によっ
て耐食性を付与させることを目的とする浸硼処理方法と
しては、塩化硼素と水素などを用いるガス法、塩化硼素
と塩化アンモニウムなどを用いる粉末パンク法、硼素と
炭化珪素などの混合溶融塩を用いて電解する電解法、硼
素と炭化珪素などの溶融塩を用いて浸漬する浸漬法など
が知られている。(Prior technology) Boron is infiltrated into the surface of iron and steel to increase the hardness of the surface layer and improve wear resistance, and also to provide corrosion resistance with a dense boron layer. Boron treatment methods include a gas method using boron chloride and hydrogen, a powder puncture method using boron chloride and ammonium chloride, an electrolytic method using a mixed molten salt of boron and silicon carbide, etc. A method of immersion using molten salt is known.
（発明が解決しようとする問題点）
前記ガス法は装置が複雑で操作に危険があり、原料も高
価で処理時間が長いなどの欠点があり殆ど実用化されな
い。(Problems to be Solved by the Invention) The gas method has drawbacks such as complicated equipment, dangerous operation, expensive raw materials, and long processing time, and is rarely put into practical use.
−方、前記粉末パック法、電解法、浸漬法はいずれも８
００℃以上の高温で処理される方法である。鉄および鋼
の加熱、冷却による変形は、７５０℃以下では単純な膨
張収縮があるのみで変形は極めて少ないが、７５０℃を
上廻って加熱するとＡ。- method, the powder pack method, electrolytic method, and immersion method are all rated 8.
This method involves processing at a high temperature of 00°C or higher. Deformation of iron and steel due to heating and cooling is extremely small, with only simple expansion and contraction occurring below 750°C, but when heated above 750°C, A.
変態を生じ、冷却に際し不可逆的な変形を住し、変形量
が大きくなる。また８５０”Ｃ以上の高温で処理する従
来の方法によれば、変形率０．２〜０．３％でブリネル
硬さも３０〜５０上昇し、寸法変化。A transformation occurs, and upon cooling, irreversible deformation occurs, and the amount of deformation increases. Furthermore, according to the conventional method of processing at a high temperature of 850"C or higher, the Brinell hardness increases by 30 to 50 at a deformation rate of 0.2 to 0.3%, resulting in dimensional changes.
硬さ変化を生ずる欠点がある。浸硼処理した鉄および鋼
の表面層はマイクロブイ７カース硬さ１５００以上とな
るため、表面加工は極めて困難である。It has the disadvantage of causing changes in hardness. The surface layer of iron and steel subjected to boring treatment has a microbuoy 7-curse hardness of 1500 or more, making surface processing extremely difficult.
−方、寸法調整のための加工を施すと、浸硼層が削りと
られて薄くなり、浸硼効果が著しく減少するほか、浸硼
層が使用時に剥離する危険がある。- On the other hand, when processing for dimensional adjustment is performed, the boron layer is scraped off and becomes thinner, which significantly reduces the boron effect, and there is a risk that the boron layer may peel off during use.
さらに従来法によれば、硼砂を主成分とし炭化珪素など
を混合した溶融塩が用いられるが、この種の溶融塩は水
に対する溶解度が少なく、電解法。Furthermore, according to the conventional method, a molten salt containing borax as a main component and mixed with silicon carbide, etc. is used, but this type of molten salt has low solubility in water, so the electrolytic method is required.
浸漬法の処理を行った後に被処理物に付着した塩は容易
に除去することができず、酸処理を施すと酸によって分
解した塩は再使用不能であり、コスト高となるのみなら
ずこれを廃棄すれば公害の原因となる問題がある。Salt that adheres to the object after immersion treatment cannot be easily removed, and when acid treatment is applied, the salt decomposed by the acid cannot be reused, which not only increases costs but also If they are disposed of, there is a problem of causing pollution.
（問題点を解決するための手段）
本発明は、従来技術の有する前記問題点を除去・改善す
ることのできる浸硼処理方法を提供することを目的とす
るものであり、特許請求の範囲記載の方法を提供するこ
とによって、前記目的を達成することができる。すなわ
ち、
１、 Ｎａ２Ｏ １０〜２５％、に２Ｏ１５〜３０％
とさらにＬｉ２Ｏ２〜２４％を含有し、残部不可避的不
純物とＢ２Ｏ３とからなる溶融塩を用い、前記溶融塩を
構成する塩が揮発する温度より低く、かつ前記溶融塩の
溶融温度以上の温度において、浸漬法、電解法のいずれ
か一つの方法により鉄および鋼を浸硼することを特徴と
する処理後被処理物の寸法変化、硬さ変化が少なく、付
着した塩を容易に除去することができる鉄および綱の浸
硼処理方法、
２、上記電解法は、７５０℃を上廻らない温度の上記成
分組成の溶融塩を用い、鉄および鋼を陰極、るつぼを陽
極として電解することにより浸硼させることを特徴とす
る特許請求の範囲第１項記載の方法に関するものである
。(Means for Solving the Problems) The present invention aims to provide a borening treatment method that can eliminate and improve the above-mentioned problems of the prior art. The above object can be achieved by providing a method. That is, 1. Na2O 10-25%, 2O 15-30%
Furthermore, using a molten salt containing 24% of Li2O2 and the remainder consisting of inevitable impurities and B2O3, at a temperature lower than the temperature at which the salt constituting the molten salt volatilizes and higher than the melting temperature of the molten salt, Iron and steel are impregnated by either the immersion method or the electrolytic method.After treatment, there is little change in the dimensions or hardness of the treated object, and attached salts can be easily removed. Method for impregnating iron and steel; 2. The electrolytic method uses a molten salt having the above-mentioned composition at a temperature not exceeding 750°C, and conducts impregnation by electrolyzing iron and steel as a cathode and a crucible as an anode. The present invention relates to a method according to claim 1, characterized in that:
次に本発明の詳細な説明する。Next, the present invention will be explained in detail.
本発明者らは数多くの実験を行い、ＮａｔＯ１０〜２５
％、ＫｚＯ１５〜３０％、残部Ｂ ｔ ＯｓにＬｉ、Ｏ
を２〜２４％添加することにより、溶融塩の融点を下げ
た結果、７５０度を上廻らぬ温度で浸漬法または電解法
によって鉄および鋼に浸硼処理を施すことができ、しか
も前記成分組成の塩は水に対する溶解度が極めて大きい
ことを知見し本発明を完成した。The inventors conducted numerous experiments and found that NatO10-25
%, KzO 15-30%, balance B t Os with Li, O
As a result of lowering the melting point of the molten salt by adding 2 to 24% of The present invention was completed based on the discovery that the salt has extremely high solubility in water.
本発明による前記成分組成の塩は前記のごとく水に対す
る溶解度が極めて大きいので、浸硼処理後冷却した被処
理物を水中または温水に投入し、ブラシなどで表面を処
理することにより容易に付着した塩を洗いおとすことが
できる。また洗滌後の洗滌液に含まれる塩は洗滌液を蒸
発させることにより回収可能であり、本発明による浸硼
処理は極めて有利である。なお本発明の塩が水溶性であ
る機構、理由は不詳である。Since the salt having the above-mentioned composition according to the present invention has extremely high solubility in water as described above, it can be easily adhered to by placing the cooled object to be treated in water or hot water after the immersion treatment and treating the surface with a brush or the like. You can wash away the salt. Furthermore, the salts contained in the washing solution after washing can be recovered by evaporating the washing solution, making the boring treatment according to the present invention extremely advantageous. The mechanism and reason why the salt of the present invention is water-soluble is unknown.
さらに本発明による浸硼処理方法は、７５０℃を超えな
い温度で浸硼処理を施すことができるため、変形率０．
１％以下で硬化も殆ど認められず、寸法変化、硬度変化
を少なくすることができた。Further, in the borizing treatment method according to the present invention, the boring treatment can be performed at a temperature not exceeding 750°C, so that the deformation rate is 0.
At 1% or less, almost no curing was observed, and dimensional changes and hardness changes could be reduced.
次に塩成分の限定理由について述べる。Next, the reason for limiting the salt component will be described.
鉄および鋼の浸硼処理塩に８．０３を主成分とし、Ｎａ
、Ｏ，に、Ｏを用いることは知られている。The main component is 8.03 in the iron and steel boron treatment salt, and Na
, O, is known to be used.
Ｎａ、ＯとＢ２Ｏ３の状態図からＮ ａ ｚ Ｂ ４０
？ （Ｎ ａ ２０３３％）は溶融点が７３０℃であ
り、浸硼処理温度は７５０℃以上である。ＮａｚＯＢ２
０３ （ＮａｚＯ７３％）は溶融点６７５℃で低融点の
組成のものであるが、この種の塩を用いて電解を行って
も浸硼されない。またＮ ａ ２ Ｂ ａ ０７は水に
対する溶解度が低いため浸硼処理後に付着した塩の除去
に問題があり、Ｎａｚ０９Ｂ２０３ （Ｎａｎ０１０％
）は溶融点６８２℃で低融点となっているが、ガラス質
のためＮ ８２ Ｂ ａ Ｏ？より塩の除去が困難であ
り、ＮａｚＯＢ２Ｏ２系の塩のみでは不適である。From the phase diagram of Na, O and B2O3, N a z B 40
? (N a 2033%) has a melting point of 730°C and a boron immersion treatment temperature of 750°C or higher. NazOB2
Although 03 (NazO 73%) has a low melting point composition with a melting point of 675°C, it is not eroded even if electrolysis is performed using this type of salt. In addition, Na 2 B a 07 has a low solubility in water, so there is a problem in removing the salts attached after the boronic treatment.
) has a low melting point of 682°C, but because it is glassy, N 82 B a O? It is more difficult to remove the salt, and NazOB2O2-based salt alone is not suitable.
本発明による塩の組成は、数多くの結果発見されたもの
で、Ｎ ａ ｚ Ｏ−Ｋ ２０ Ｌ １ ｚ ＯＢ
ｚ Ｏ３系の各種組成の塩において、Ｎａ２Ｏ１０〜２
５％。The composition of the salt according to the invention was discovered as a result of a number of results:
z In O3-based salts of various compositions, Na2O10-2
5%.
ＫｚＯｉｓ〜３０％にＬｉ、Ｏを添加し、残部をＢ２Ｏ
３とする塩の溶融点を測定し、第１図にＬｉｚＯ（％）
と溶融点との関係を示した。これらの関係から溶融点が
低く、７００℃での浸硼が可能で、かつ水溶性の優れた
塩に含まれるべきＬｉ２Ｏの濃度は２〜２４％と規定さ
れる。従って、Ｎａ２Ｏ１０〜２５％、 Ｋ、ｏ １５
〜３０％、残部Ｂ２０゜に添加するＬｉ、Ｏの含有量は
２〜２４％の範囲内にする必要がある。Add Li and O to KzOis~30%, and add the rest to B2O
The melting point of the salt 3 was measured and shown in Figure 1 as LizO (%).
The relationship between this and the melting point is shown. From these relationships, the concentration of Li2O that should be included in a salt that has a low melting point, can be immersed at 700°C, and has excellent water solubility is specified to be 2 to 24%. Therefore, Na2O 10-25%, K, o 15
~30%, and the content of Li and O added to the remaining B20° needs to be within the range of 2 to 24%.
次に本発明を実施例について説明する。Next, the present invention will be explained with reference to examples.
（実施例１）
ＮａｔＯ１９，２７％、 Ｋ２Ｏ ２３．９９％、
Ｂ２Ｏ３５３，４５％、 ＬｉｚＯ３，２９％の組成
の塩を用い、５２ＳＣ材に対し、７００℃、電流密度０
．２ Ａｍｐ／ａｍ２゜１時間の電解条件で浸硼処理を
施した。第２図は浸硼処理後切断し、３％ナイタル腐食
した表面層組織の顕微鏡写真（Ｘ２５０）である。浸硼
層の硬さはマイクロビッカース硬さ１３００であり、浸
硼処理後７０℃の温水中で付着した塩を布で擦りとる程
度で完全に除去することができた。(Example 1) NatO 19.27%, K2O 23.99%,
Using salt with a composition of B2O353.45% and LizO3.29%, the temperature was 700℃ and the current density was 0 for 52SC material.
．． Boron immersion treatment was performed under electrolytic conditions of 2 Amp/am2° for 1 hour. FIG. 2 is a micrograph (X250) of the surface layer structure which was cut after the borening treatment and 3% nital corroded. The hardness of the boron-soaked layer was 1300 micro-Vickers hardness, and after the boron-soaking treatment, the adhering salt could be completely removed by rubbing it with a cloth in hot water at 70°C.
（実施例２）
ＮａｚＯ１４，５０％、 Ｋ２Ｏ １８．０８％、
Ｂ２Ｏ２６０，８０％、 Ｌｉ２Ｏ６．６４％の組成
の塩を７５０℃に過熱し、この溶融塩にＳＫ３材を３時
間浸漬して浸硼処理を施した。第３図は浸硼処理後切断
し、３％ナイタル腐食した表面層組織の顕微鏡写真（Ｘ
２５０）である。浸硼層の硬さはマイクロピンカース硬
さ１５００であり、浸硼処理後５０℃の温水中に３０分
間被処理物を漬けた後付着した塩を布で拭きとることで
清浄なものとなった。(Example 2) NazO 14.50%, K2O 18.08%,
A salt having a composition of 60.80% B2O2 and 6.64% Li2O was heated to 750°C, and the SK3 material was immersed in this molten salt for 3 hours to perform a boron immersion treatment. Figure 3 is a micrograph (X
250). The hardness of the bored layer is Micropinkers hardness 1500, and after the bored treatment, it can be cleaned by immersing the object in warm water at 50°C for 30 minutes and wiping off the adhering salt with a cloth. Ta.
以上本発明は、上述のように溶融塩の成分組成を新規な
組成に調整することにより、７５０℃を上廻らない温度
で浸硼処理が施され、被処理物の寸法変化、硬さ変化が
少なく、付着した塩を容易に除去することができた。As described above, in the present invention, by adjusting the component composition of the molten salt to a new composition, the immersion treatment is performed at a temperature not exceeding 750°C, and the dimensional change and hardness change of the object to be treated are reduced. The attached salt could be easily removed.
（発明の効果）
近来、金属表面を改質し、高性能表面を有する金属材料
を製造する技術開発が行われており、鉄鋼の表面に硼素
を浸硼させる処理方法も多く提案されている。(Effects of the Invention) Recently, technological developments have been made to modify metal surfaces and produce metal materials with high performance surfaces, and many treatment methods have been proposed in which the surface of steel is impregnated with boron.
しかし従来法では処理による寸法変化が太き（、又浸硼
剤の除去が容易でないため実用化が遅れている。However, in the conventional method, practical application has been delayed because the dimensional change due to treatment is large (and the removal of the borizing agent is not easy).
本発明によれば上記諸欠点が解決されるため、安価な鉄
系材料にセラミックスに優る表面性能をあたえた複合材
料を容易に製造することができ、今後高性能機械部品な
どへの応用が期待される。According to the present invention, since the above-mentioned drawbacks are solved, it is possible to easily produce a composite material that provides surface performance superior to ceramics using inexpensive iron-based materials, and is expected to be applied to high-performance mechanical parts in the future. be done.
第１図はＬｉ２Ｏ％と溶融点との関係を示す図、第２図
、第３図は本発明方法により浸硼処理した浸硼層組織の
顕微鏡写真（ｘ ２５０）である。
特許出願人 岩手製鉄株式会社
代理人 弁理士 村 １）政 治
Ｌｉθ （’／、）
手続ネ甫正書（オＮ）
昭和６１年 ９月 ４日
特許庁長官 黒 １）明 雄 殿
１、事件の表示
昭和６１年特許願第１４６２１７号
２、発明の名称
鉄および綱の浸硼処理方法
３、補正をする者
事件との関係 特許出願人
住 所 宮城県仙台市人来田二丁目１１−１８氏 名
杉 本 克 久
住 所 岩手県和賀郡和賀町寝根１８地割１４番地名
称 岩手製鉄株式会社
代表者 小原康司
４、代理人 〒１０４
６、補正の対象 明細書の「図面の簡単な説明」の
欄、６層、；）
７、補正の内容
（１） 明細書第９頁第１３〜１４行の記載を下記の
とおりに訂正する。
「第２図、第３図はそれぞれ５２５Ｃ材、 ＳＫＳ材
に本発明方法により浸硼処理を施した浸硼層を有する金
属組織の顕微鏡写真（Ｘ ２５０）である。」FIG. 1 is a diagram showing the relationship between Li2O% and melting point, and FIGS. 2 and 3 are micrographs (x 250) of a bored layer structure treated by the method of the present invention. Patent Applicant Iwate Steel Co., Ltd. Agent Patent Attorney Mura 1) Politics Liθ ('/,) Procedure Neho Seisho (ON) September 4, 1986 Commissioner of the Patent Office Kuro 1) Akio Tono 1, Case Indication of 1986 Patent Application No. 146217 2, Name of the invention Method for impregnating iron and rope 3, Relationship with the case of the person making the amendment Patent applicant Address 2-11-18 Hitokita, Sendai City, Miyagi Prefecture Name Katsu Sugimoto Address: 14 Lot 18, Nene, Waga-cho, Waga-gun, Iwate Name: Iwate Steel Co., Ltd. Representative: Yasushi Ohara 4, Agent Address: 104-6, Subject of amendment: "Brief explanation of drawings" section of the description , 6 layers;) 7. Contents of amendment (1) The statement on page 9, lines 13 to 14 of the specification is corrected as follows. ``Figures 2 and 3 are micrographs (X 250) of metal structures with bored layers obtained by applying boring treatment to 525C material and SKS material by the method of the present invention, respectively.''
Claims (1)
さらにＬｉ＿２Ｏ２〜２４％を含有し、残部不可避的不
純物とＢ＿２Ｏ＿３とからなる溶融塩を用い、前記溶融
塩を構成する塩が揮発する温度より低く、かつ前記溶融
塩の溶融温度以上の温度において、浸漬法、電解法のい
ずれか一つの方法により鉄および鋼を浸硼することを特
徴とする処理後被処理物の寸法変化、硬さ変化が少なく
、付着した塩を容易に除去することができる鉄および鋼
の浸硼処理方法。 ２、上記電解法は、７５０℃を上廻らない温度の上記成
分組成の溶融塩を用い、鉄および鋼を陰極、るつぼを陽
極として電解することにより浸硼させることを特徴とす
る特許請求の範囲第１項記載の方法。[Claims] 1. Using a molten salt containing 10 to 25% of Na_2O, 15 to 30% of K_2O, and further 24% of Li_2O, with the remainder consisting of inevitable impurities and B_2O_3, the salt constituting the molten salt is volatile. dimensional change of the treated object after treatment, characterized in that iron and steel are impregnated by either an immersion method or an electrolytic method at a temperature lower than the melting temperature of the molten salt and higher than the melting temperature of the molten salt; A method for impregnating iron and steel that causes little change in hardness and allows for easy removal of adhering salts. 2. The above-mentioned electrolytic method is characterized in that ferrolysis is carried out by electrolyzing using a molten salt having the above-mentioned composition at a temperature not exceeding 750°C, with iron and steel used as a cathode and a crucible as an anode. The method described in paragraph 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14621786A JPH0830258B2 (en) | 1986-06-24 | 1986-06-24 | Boron treatment method for iron and steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14621786A JPH0830258B2 (en) | 1986-06-24 | 1986-06-24 | Boron treatment method for iron and steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS634094A true JPS634094A (en) | 1988-01-09 |
| JPH0830258B2 JPH0830258B2 (en) | 1996-03-27 |
Family
ID=15402757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14621786A Expired - Lifetime JPH0830258B2 (en) | 1986-06-24 | 1986-06-24 | Boron treatment method for iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0830258B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007529087A (en) * | 2003-07-10 | 2007-10-18 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Electric heating element including radiant tube |
| CN102517542A (en) * | 2011-12-16 | 2012-06-27 | 广西师范大学 | Boriding agent for boriding on metallic titanium surface and boriding technique |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110453237B (en) * | 2019-09-02 | 2021-08-20 | 江西理工大学 | A kind of method for preparing titanium diboride coating by molten salt electrolysis |
-
1986
- 1986-06-24 JP JP14621786A patent/JPH0830258B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007529087A (en) * | 2003-07-10 | 2007-10-18 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Electric heating element including radiant tube |
| CN102517542A (en) * | 2011-12-16 | 2012-06-27 | 广西师范大学 | Boriding agent for boriding on metallic titanium surface and boriding technique |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0830258B2 (en) | 1996-03-27 |
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