JPH02173237A - Sintered alloy for surface hardening - Google Patents
Sintered alloy for surface hardeningInfo
- Publication number
- JPH02173237A JPH02173237A JP32775888A JP32775888A JPH02173237A JP H02173237 A JPH02173237 A JP H02173237A JP 32775888 A JP32775888 A JP 32775888A JP 32775888 A JP32775888 A JP 32775888A JP H02173237 A JPH02173237 A JP H02173237A
- Authority
- JP
- Japan
- Prior art keywords
- powdered
- alloy
- boron
- surface hardening
- sintered alloy
- 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
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 239000000956 alloy Substances 0.000 title claims abstract description 32
- 239000000843 powder Substances 0.000 claims abstract description 31
- 229910052796 boron Inorganic materials 0.000 claims abstract description 30
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 12
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 10
- 229910052726 zirconium Inorganic materials 0.000 claims abstract description 10
- 230000005496 eutectics Effects 0.000 claims abstract description 9
- 229910052735 hafnium Inorganic materials 0.000 claims abstract description 9
- 229910052715 tantalum Inorganic materials 0.000 claims abstract description 9
- 238000002156 mixing Methods 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 6
- 229910020630 Co Ni Inorganic materials 0.000 claims abstract description 5
- 229910002440 Co–Ni Inorganic materials 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 28
- 238000000465 moulding Methods 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 7
- 238000002844 melting Methods 0.000 abstract description 6
- 230000008018 melting Effects 0.000 abstract description 6
- 238000005336 cracking Methods 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 5
- 238000005245 sintering Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 description 13
- 239000002184 metal Substances 0.000 description 13
- 229910052760 oxygen Inorganic materials 0.000 description 8
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007751 thermal spraying Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910020676 Co—N Inorganic materials 0.000 description 1
- 229910001347 Stellite Inorganic materials 0.000 description 1
- AHICWQREWHDHHF-UHFFFAOYSA-N chromium;cobalt;iron;manganese;methane;molybdenum;nickel;silicon;tungsten Chemical group C.[Si].[Cr].[Mn].[Fe].[Co].[Ni].[Mo].[W] AHICWQREWHDHHF-UHFFFAOYSA-N 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明はＣｏ又はＮｉ基若しくはＣｏ−Ｎｉ合金基の
表面硬化用焼結合金の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to improvements in Co- or Ni-based or Co-Ni alloy-based sintered alloys for surface hardening.
［従来技術］
従来、Ｃｏ又はＮｉ基の表面硬化用合金としてＣｏ基に
ついては、例えば重量％でＣ：２．２Ｓｉ：０．８．Ｍ
ｎ：２．ＯＮｉ：３．ＯＣｒ：３０．Ｏ，Ｗ： １３．
Ｏ，Ｃｏ：４６．ＯＦｅ：２．Ｏ，その他く１のステラ
イト、Ｎｉ基については、例えば重量％でＣ：０．８．
Ｓｉ：４．Ｏ，Ｍｎ： １．Ｏ，Ｎｉ ニア２．Ｏ，Ｃ
ｒ：１４．Ｏ，Ｃｏ：２．Ｏ，Ｂ：４．Ｏ，Ｆｅ：３．
０．その他く１のコルモノイ等がよく知られている。[Prior Art] Conventionally, as a Co-based or Ni-based surface hardening alloy, for example, C:2.2Si:0.8. M
n:2. ONi:3. OCr: 30. O, W: 13.
O, Co: 46. OFe:2. Regarding O, other stellite and Ni groups, for example, C: 0.8.
Si:4. O, Mn: 1. O, Ni near 2. O,C
r:14. O, Co: 2. O, B: 4. O, Fe: 3.
0. Other well-known examples include Kolmonoi.
［発明が解決しようとする課題］
従来公知のＣｏ又はＮｉ基の合金は一般に融点が低く１
１００°Ｃ位に加熱されると溶解するので熔接や溶射な
どの加工によって容易に異種金属表面に接合できるとい
う利点を有する。[Problem to be solved by the invention] Conventionally known Co- or Ni-based alloys generally have a low melting point of 1
Since it melts when heated to about 100°C, it has the advantage that it can be easily joined to dissimilar metal surfaces by processes such as welding and thermal spraying.
一方、これらの合金は主として熔接及び溶射工程におけ
る作業性の観点から融点を上昇させないためにバナジウ
ムやタングステンなどの硬くて融点の高い炭化物や硼化
物を生成する元素の添加物が厳しく制限されている。On the other hand, in order not to raise the melting point of these alloys, mainly from the viewpoint of workability during welding and thermal spraying processes, the addition of elements such as vanadium and tungsten that produce hard carbides and borides with high melting points is strictly limited. .
本発明の目的は融点の高い硼化物を生成する元素量をで
きるだけ多く含有するＣｏ又はＮｉ基若しくはＣｏ−Ｎ
ｉ合金基の表面硬化用焼結合金を提供することにある。The object of the present invention is to use Co or Ni bases or Co-N
An object of the present invention is to provide a sintered alloy for surface hardening based on i-alloy.
［課題を解決するための手段］
本発明によれは硼素を４−６重量％含有するＣｏ又はＣ
ｏ−Ｎｉ合金粉末にＴｉ、Ｖ及びＣｒの粉末のうち１種
以上をその合計量が硼素の４倍以下及びＺｒ、Ｎｂ、Ｍ
ｏ、Ｈｆ、Ｔａ及びＷの粉末のうち１種以上をその合計
量が硼素の２倍以下となるように配合して混合した後、
成形して１０６０〜１１４０°Ｃの共晶温度に加熱する
こと、或いは硼素を４−６重量％含有するＮｉ合金粉末
にＴｉ、Ｖ及びＣｒの粉末のうち１種以上をその合計量
が硼素の４倍以下及びＺｒ、Ｎｂ、Ｍｏ。[Means for solving the problem] According to the present invention, Co or C containing 4-6% by weight of boron
Add one or more of Ti, V and Cr powders to the o-Ni alloy powder in a total amount of not more than 4 times that of boron, and Zr, Nb, M
After blending and mixing one or more of O, Hf, Ta, and W powders such that the total amount is not more than twice that of boron,
By molding and heating to a eutectic temperature of 1060-1140°C, or by adding one or more of Ti, V and Cr powder to Ni alloy powder containing 4-6% by weight of boron, the total amount of which is less than that of boron. 4 times or less and Zr, Nb, Mo.
Ｈｆ、Ｔａ及びＷの粉末のうち１種以上をその合計量が
硼素の２倍以下となるように配合して混合した後、成形
して１０６０〜１１４０℃の共晶温度に加熱することに
よって表面硬化が高く、しかも靭性が大きくて割れにも
強い表面硬化用合金が得られる。After mixing one or more of Hf, Ta, and W powders so that the total amount is less than twice that of boron, the surface is A surface hardening alloy that is highly hardened, has high toughness, and is resistant to cracking can be obtained.
［発明の作用］
一般的に硼素は室温においてＣｏ及びＮｉとは互いに溶
は合わない性質を持っているが、硼素を含むＣｏ又はＮ
ｉの溶液若しくはＣｏ−Ｎｉの混合溶液はそれぞれ１１
４０℃又は１０６０℃の共晶温度において硼化物と共晶
体をつくるから、予めこれらの共晶体から成る粉末をつ
くり、これらの粉末にＶ、Ｔｉ、ＣｒやＺｒ、Ｎｂ、Ｍ
ｏ。[Operation of the invention] Generally, boron has the property of not being soluble with Co and Ni at room temperature, but Co or N containing boron
The solution of i or the mixed solution of Co-Ni is 11, respectively.
Since a boride and eutectic are formed at a eutectic temperature of 40°C or 1060°C, powders made of these eutectics are prepared in advance, and V, Ti, Cr, Zr, Nb, and M are added to these powders.
o.
）１ｆ、Ｔａ、Ｗ粉末を均一に混合し、圧粉、成形の後
、それぞれの共晶温度に加熱すればＣｏ又はＮｉ中の硼
素はより親和性の高い■やＷなどと反応焼結し、これら
の硼化物を生成する。) If 1f, Ta, and W powders are uniformly mixed, compacted, and then heated to their respective eutectic temperatures, boron in Co or Ni will react and sinter with the more compatible materials such as ■ and W. , produce these borides.
生成した■やＷなどの硼化物は共晶体より融点がかなり
高いので、加熱時間と共に溶融体は減少し、Ｃｏ又はＮ
ｉ中の硼素量に見合う量の■やＷなどを配合しておけば
硼素はこれらの添加元素の硼化物となって固化する。こ
のときの硼化物の体積率はＣｏまたはＮｉ硼化物の密度
と■やＷなどの添加する金属粉末がつくる硼化物との密
度の差によって変化する。The melting points of the produced borides such as
If an amount of (2), W, etc. corresponding to the amount of boron in i is blended, boron will solidify as a boride of these additional elements. The volume fraction of the boride at this time changes depending on the difference in the density of the Co or Ni boride and the density of the boride formed by the metal powder added such as (2) or W.
一般に粉末冶金でつくられる焼結合金は焼結時に体積収
縮が起こるので表面硬化合金として実用するためにはで
きるだけ体積収縮を少なくする必要がある。Generally, sintered alloys made by powder metallurgy undergo volumetric shrinkage during sintering, so in order to be used as a surface-hardened alloy, it is necessary to reduce volumetric shrinkage as much as possible.
従って、本発明ではこれらの点を考慮して添加する金属
粉末の種類量を特定しているから、この成分範囲のもの
であれば実際に表面硬化用合金として使用したときに割
れが生じることはない。Therefore, in the present invention, the type and amount of metal powder to be added is specified in consideration of these points, so if the metal powder is within this range, cracks will not occur when actually used as a surface hardening alloy. do not have.
［実施例］
本発明の表面硬化用合金の硬化の原因は主にＴｔ、Ｖ、
Ｃｒ、Ｚｒ、Ｎｂ、Ｍｏ、Ｈｆ、Ｔａ及びＷが硬質の硼
化物を形成することによる。[Example] The hardening of the surface hardening alloy of the present invention is mainly caused by Tt, V,
This is because Cr, Zr, Nb, Mo, Hf, Ta, and W form hard borides.
即ち、表面硬化用焼結合金としての硬さは硼化物の体積
率、換言すれば硼素量によって決定される。That is, the hardness of the sintered alloy for surface hardening is determined by the volume fraction of boride, in other words, the amount of boron.
従って、本発明では硼素量の下限をＣｏ及びＮｉ基の実
用表面硬化用合金に於いて保障される４重量％とじてい
る。Therefore, in the present invention, the lower limit of the amount of boron is set at 4% by weight, which is guaranteed for practical surface hardening alloys based on Co and Ni.
即ち、硼素量がこれ以下では表面硬化用合金として十分
な硬さをえることが出来ない。That is, if the amount of boron is less than this, sufficient hardness cannot be obtained as a surface hardening alloy.
一方、硼素量の上限は添加する金属粉末の種類と添加量
により生じる体積収縮との関連から決定した。即ち、本
発明で添加される金属粉末の中で最もその硼化物の密度
の高いものはＷでり、Ｃｏ−やＮｉの場合に比べて約２
倍の密度を持っている。このことは同じ体積率を持たせ
るためには２倍の硼素量即ち、少なくとも８重量％が必
要であるが、本発明では硼化物の密度の高い元素の使用
量を金属粉末全添加量の１／３以下に制限しているので
、硼素量の上限を６％としている。On the other hand, the upper limit of the amount of boron was determined based on the relationship between the type of metal powder to be added and the volume shrinkage caused by the amount added. That is, among the metal powders added in the present invention, W has the highest boride density, which is approximately 2% higher than that of Co- and Ni.
It has twice the density. This means that in order to have the same volume fraction, twice the amount of boron, that is, at least 8% by weight, is required, but in the present invention, the amount of the element with high boride density is reduced to 1% of the total amount of metal powder added. Therefore, the upper limit of the boron content is set at 6%.
本発明で使用する添加金属粉末はいずれも硬い硼化物を
生成するので本発明焼結合金に対して有効な添加元素で
あるが、前述のようにそれぞれの金属硼化物の密度の違
いが体積収縮率に影響し、かつ体積収縮率の違いにより
実用に供する表面硬化用焼結合金での被処理材料との関
連で収縮による割れが生じる。All of the additive metal powders used in the present invention produce hard borides, so they are effective additive elements for the sintered alloy of the present invention, but as mentioned above, the difference in density of each metal boride causes volumetric shrinkage. cracking occurs due to shrinkage in relation to the material to be treated in surface hardening sintered alloys used in practical applications due to differences in volumetric shrinkage rates.
本発明ではこれらの関係を明確にするなめに一定量の硼
素を含有するＮｉ合金に硼素量の５倍の金属粉末をそれ
ぞれ配合して添加金属元素が体積収縮に及ぼす影響を調
べた結果、硼化物の密度が小さいＴｉ、Ｖ、Ｃｒは体積
収縮率は小さいが硼化物の密度が大きいＷ、Ｍｏ、Ｚｒ
、Ｎｂ。In the present invention, in order to clarify these relationships, we mixed metal powder with an amount of five times the amount of boron into a Ni alloy containing a certain amount of boron, and investigated the effect of the added metal element on volumetric shrinkage. Ti, V, and Cr, which have a small density of oxides, have a small volume shrinkage rate, but W, Mo, and Zr, which have a large density of borides.
, Nb.
Ｈｆ、Ｔａなどは体積収縮率が大きかった。Hf, Ta, etc. had a large volumetric shrinkage rate.
また、被処理材料の表面に一定量の硼素を含むＮｉ合金
と前記各種の金属粉末との混合粉末を置き、一定圧力で
一体に成形した後、共晶温度に加熱して反応焼結を行っ
たところ体積収縮率の大きなＷ、Ｍｏ、Ｈｆ、Ｎｂ、Ｔ
ａなどはいずれも焼結合金表面に割れの発生がみられた
が、硼化物の密度の小さいＴｉ、Ｖ、Ｃｒでは、いずれ
も焼結合金の表面に割れの発生は認められなかった。In addition, a mixed powder of a Ni alloy containing a certain amount of boron and the various metal powders mentioned above is placed on the surface of the material to be treated, and after being molded together under a certain pressure, reaction sintering is performed by heating to the eutectic temperature. W, Mo, Hf, Nb, and T have a large volumetric shrinkage rate.
Cracks were observed on the surface of the sintered alloys of samples a and the like, but no cracks were observed on the surfaces of the sintered alloys of Ti, V, and Cr, which have low boride densities.
これらの結果から、実用に供し得る表面硬化用の焼結合
金を得るためにはそれぞれの金属粉末の添加量の組合せ
を変えて体積収縮率と焼結合金表面の割れの発生状況を
調査したところ、Ｔｉ。Based on these results, in order to obtain a sintered alloy for surface hardening that can be put to practical use, we investigated the volumetric shrinkage rate and the occurrence of cracks on the surface of the sintered alloy by changing the combination of the amounts of each metal powder added. , Ti.
Ｖ、Ｃｒ粉末の添加量が合計で硼素量の４倍Ｚｒ、Ｎｂ
、Ｍｏ、Ｈｆ、Ｔａ及びＷ粉末の添加量が合計で硼素量
の２倍を超えない範囲であれば焼結合金の表面に割れの
発生しない表面硬化用焼結合金が得られた。The total amount of V, Cr powder added is 4 times the amount of boron, Zr, Nb
, Mo, Hf, Ta, and W powders were added in a range that did not exceed twice the amount of boron in total, a sintered alloy for surface hardening was obtained in which no cracking occurred on the surface of the sintered alloy.
［発明の効果］
本発明の表面硬化用焼結合金は硬くて高融点の硼化物を
含んでいるので高温度での使用に適した耐摩耗材料を得
ることができる。[Effects of the Invention] Since the surface-hardening sintered alloy of the present invention contains a boride that is hard and has a high melting point, it is possible to obtain a wear-resistant material suitable for use at high temperatures.
Claims (1)
金粉末にＴｉ、Ｖ及びＣｒの粉末のうち１種以上をその
合計量が硼素の４倍以下及びＺｒ、Ｎｂ、Ｍｏ、Ｈｆ、
Ｔａ及びＷの粉末のうち１種以上をその合計量が硼素の
２倍以下となるように配合して混合した後、成形して共
晶温度に加熱して得られる表面硬化用焼結合金。 ２）硼素を４−６重量％含有するＮｉ合金粉末にＴｉ、
Ｖ及びＣｒの粉末のうち１種以上をその合計量が硼素の
４倍以下及びＺｒ、Ｎｂ、Ｍｏ、Ｈｆ、Ｔａ及びＷの粉
末のうち１種以上をその合計量が硼素の２倍以下となる
ように配合して混合した後、成形して共晶温度に加熱し
て得られる表面硬化用焼結合金。[Scope of Claims] 1) Co or Co-Ni alloy powder containing 4-6% by weight of boron and one or more of Ti, V and Cr powders in a total amount of not more than 4 times that of boron, and Zr, Nb, Mo, Hf,
A sintered alloy for surface hardening obtained by blending and mixing one or more of Ta and W powders so that the total amount is not more than twice that of boron, followed by molding and heating to the eutectic temperature. 2) Ni alloy powder containing 4-6% by weight of boron with Ti,
The total amount of one or more of V and Cr powders is not more than 4 times that of boron, and the total amount of one or more of Zr, Nb, Mo, Hf, Ta, and W powders is not more than 2 times that of boron. A sintered alloy for surface hardening that is obtained by blending and mixing so as to achieve the following, then molding and heating to the eutectic temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63327758A JP2560816B2 (en) | 1988-12-27 | 1988-12-27 | Method for producing reaction-bonded gold for surface hardening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63327758A JP2560816B2 (en) | 1988-12-27 | 1988-12-27 | Method for producing reaction-bonded gold for surface hardening |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02173237A true JPH02173237A (en) | 1990-07-04 |
| JP2560816B2 JP2560816B2 (en) | 1996-12-04 |
Family
ID=18202661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63327758A Expired - Lifetime JP2560816B2 (en) | 1988-12-27 | 1988-12-27 | Method for producing reaction-bonded gold for surface hardening |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2560816B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010018868A (en) * | 2008-07-14 | 2010-01-28 | Sumitomo Heavy Ind Ltd | Member provided with surface layer and method for producing the same |
| JP2010037598A (en) * | 2008-08-05 | 2010-02-18 | Sumitomo Heavy Ind Ltd | Method for manufacturing member having wear resistant inner peripheral surface |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5462118A (en) * | 1977-10-04 | 1979-05-18 | Rolls Royce | Hard surface alloy |
| JPS5867804A (en) * | 1981-10-20 | 1983-04-22 | Toshiba Corp | Method and apparatus for forming anti-wear film |
-
1988
- 1988-12-27 JP JP63327758A patent/JP2560816B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5462118A (en) * | 1977-10-04 | 1979-05-18 | Rolls Royce | Hard surface alloy |
| JPS5867804A (en) * | 1981-10-20 | 1983-04-22 | Toshiba Corp | Method and apparatus for forming anti-wear film |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010018868A (en) * | 2008-07-14 | 2010-01-28 | Sumitomo Heavy Ind Ltd | Member provided with surface layer and method for producing the same |
| JP2010037598A (en) * | 2008-08-05 | 2010-02-18 | Sumitomo Heavy Ind Ltd | Method for manufacturing member having wear resistant inner peripheral surface |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2560816B2 (en) | 1996-12-04 |
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