JPH04285287A - Mining and construction tool made of tungsten carbide hard alloy - Google Patents
Mining and construction tool made of tungsten carbide hard alloyInfo
- Publication number
- JPH04285287A JPH04285287A JP7383091A JP7383091A JPH04285287A JP H04285287 A JPH04285287 A JP H04285287A JP 7383091 A JP7383091 A JP 7383091A JP 7383091 A JP7383091 A JP 7383091A JP H04285287 A JPH04285287 A JP H04285287A
- Authority
- JP
- Japan
- Prior art keywords
- mining
- hardness
- cemented carbide
- construction tool
- based cemented
- 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.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 29
- 238000005065 mining Methods 0.000 title claims abstract description 25
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 239000000956 alloy Substances 0.000 title abstract 4
- 229910045601 alloy Inorganic materials 0.000 title abstract 4
- 238000009826 distribution Methods 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims abstract description 8
- 150000002739 metals Chemical class 0.000 claims abstract description 4
- 150000001247 metal acetylides Chemical class 0.000 claims abstract description 3
- 230000000737 periodic effect Effects 0.000 claims abstract description 3
- 239000011230 binding agent Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- -1 iron group metals Chemical class 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 235000019589 hardness Nutrition 0.000 description 21
- 239000000843 powder Substances 0.000 description 12
- 238000005553 drilling Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
Landscapes
- Earth Drilling (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、岩石やコンクリート
等の穿岩、切断等を行う炭化タングステン（以下、ＷＣ
と記す）基超硬合金製鉱山・建設用工具に関するもので
ある。[Industrial Application Field] The present invention is directed to tungsten carbide (hereinafter referred to as WC) for drilling and cutting rocks, concrete, etc.
This relates to mining and construction tools made of cemented carbide.
【０００２】0002
【従来の技術】各種ビットなどで代表される鉱山・建設
用工具は、ＷＣ硬質相および鉄族金属結合相からなるＷ
Ｃ基超硬合金で作製されることは知られている。このＷ
Ｃ基超硬合金製鉱山・建設用工具はビッカース硬さが８
００〜１５００の範囲の異った硬さを有しており、穿岩
または切断するための岩石およびコンクリートの種類に
よって、それに適する硬さの鉱山・建設用工具が選択さ
れ、使い分けされている。[Prior Art] Mining and construction tools, typified by various bits, are made of W, which consists of a WC hard phase and an iron group metal bonding phase.
It is known that it is made of C-based cemented carbide. This W
Mining and construction tools made of C-base cemented carbide have a Vickers hardness of 8.
Mining and construction tools have different hardnesses ranging from 0.00 to 1500, and mining and construction tools are selected and used depending on the type of rock and concrete to be drilled or cut.
【０００３】0003
【発明が解決しようとする課題】しかし、適正なビッカ
ース硬さの鉱山・建設用工具を岩石およびコンクリート
の種類によって選択し、使い分けすることは熟練を要す
ることであり、この適正な選択を誤ると工具使用の初期
段階において欠損，脱落などの異常損傷が発生しやすく
、さらに、いろいろなビッカース硬さの超硬合金製鉱山
・建設工具をそろえることはコストがかかるなどの課題
があった。[Problem to be solved by the invention] However, it requires skill to select and use mining and construction tools with appropriate Vickers hardness depending on the type of rock and concrete, and if this appropriate selection is incorrect, In the early stages of tool use, abnormal damage such as breakage and falling off tends to occur, and there are also problems in that it is costly to stock cemented carbide mining and construction tools of various Vickers hardnesses.
【０００４】0004
【課題を解決するための手段】そこで、本発明者等は、
かかる課題を解決し、一層改良された超硬合金製鉱山・
建設用工具を得るべく研究を行った結果、表面部の硬さ
を中心部の硬さより低くしたＷＣ基超硬合金製鉱山・建
設用工具は、従来のように穿岩または切断する岩石およ
びコンクリートの種類によってビッカース硬さの異なる
鉱山・建設用工具を選択する必要もなく、また、工具使
用の初期段階での欠損，脱落等の異常損傷が発生するこ
ともないという知見を得たのである。[Means for solving the problem] Therefore, the present inventors
We solved these problems and developed a further improved cemented carbide mine.
As a result of research to obtain construction tools, we found that mining and construction tools made of WC-based cemented carbide, whose surface hardness is lower than the core hardness, can be used to drill or cut rocks and concrete as in the past. It was discovered that there is no need to select mining and construction tools with different Vickers hardness depending on the type of tool, and that abnormal damage such as chipping or falling off during the initial stage of tool use does not occur.
【０００５】この発明は、かかる知見にもとづいてなさ
れたものであって、ＷＣからなる第１硬質分散相と、必
要に応じて含まれる周期律表の４ａ，５ａおよび６ａ族
金属の１種または２種以上の炭化物および／または炭窒
化物からなる第２硬質分散相、並びに鉄族金属のうちの
１種または２種以上を主成分とする結合相および不可避
不純物からなるＷＣ基超硬合金製鉱山・建設用工具にお
いて、表面部の硬さは、中心部の硬さより低い硬さ分布
を有するＷＣ基超硬合金製鉱山・建設用工具に特徴を有
するものである。[0005] The present invention was made based on this knowledge, and includes a first hard dispersed phase consisting of WC and one or more metals of Groups 4a, 5a and 6a of the periodic table, which are optionally included. Made of WC-based cemented carbide consisting of a second hard dispersed phase consisting of two or more types of carbides and/or carbonitrides, a binder phase mainly composed of one or more types of iron group metals, and inevitable impurities. A mining/construction tool made of WC-based cemented carbide is characterized in that the hardness of the surface portion has a lower hardness distribution than the hardness of the center portion.
【０００６】上記表面部とは、表面および表面から１２
０μｍの深さまでの範囲を言い、上記中心部とは表面か
ら１０００μｍよりも内部の領域を言う。上記表面部の
硬さが中心部より低ければ、その間の硬さ勾配がどのよ
うになっていても鉱山・建設用工具としての所望の効果
は得られる。[0006] The above-mentioned surface portion refers to the surface and 12 points from the surface.
This refers to the range up to a depth of 0 μm, and the above-mentioned central portion refers to the area within 1000 μm from the surface. As long as the hardness of the surface portion is lower than that of the center portion, the desired effect as a mining/construction tool can be obtained regardless of the hardness gradient therebetween.
【０００７】この発明のＷＣ基超硬合金製鉱山・建設用
工具を製造するには、原料粉末を所定のＷＣ基超硬合金
の組成となるように配合し、混合し、プレス成形された
圧粉体を、１３５０〜１５００℃まで昇温し、所定の温
度で真空焼結を行ったあと、浸炭性雰囲気に切り換えて
焼結し、ついで０．１〜３．０℃／分で徐冷することに
より得られる。In order to manufacture the mining and construction tools made of WC-based cemented carbide of the present invention, raw material powders are blended to have a predetermined composition of WC-based cemented carbide, mixed, and press-formed. The powder is heated to 1350 to 1500°C, vacuum sintered at a predetermined temperature, then switched to a carburizing atmosphere for sintering, and then slowly cooled at a rate of 0.1 to 3.0°C/min. It can be obtained by
【０００８】なお、ＷＣ基超硬合金製鉱山・建設用工具
の組織中に遊離炭素が含まれている時に所望の硬さ分布
が得られやすい。[0008] Note that when free carbon is contained in the structure of a mining/construction tool made of WC-based cemented carbide, a desired hardness distribution can be easily obtained.
【０００９】この発明の硬さ分布を有するＷＣ基超硬合
金製鉱山・建設用工具は、岩石，コンクリートなどの種
類に応じて選択して使用する必要もなく、岩石およびコ
ンクリートの種類、硬さに関係なく穿岩または切断する
ことができ、極めて汎用性に富む鉱山・建設用工具であ
る。The mining and construction tools made of WC-based cemented carbide having a hardness distribution according to the present invention do not need to be selected depending on the type of rock or concrete, and can be used depending on the type and hardness of the rock or concrete. It is an extremely versatile mining and construction tool that can drill or cut rock regardless of its location.
【００１０】0010
【実施例】次に、この発明のＷＣ基超硬合金製鉱山・建
設用工具を実施例に基づいて具体的に説明する。EXAMPLES Next, the WC-based cemented carbide mining and construction tools of the present invention will be specifically explained based on examples.
【００１１】原料粉末として、いずれも平均粒径：１μ
ｍの（Ｔｉ０．５８，Ｗ０．４２）Ｃ粉末、（Ｔａ０．
８３，Ｎｂ０．１７）Ｃ粉末、Ｔｉ（Ｃ０．５６，Ｎ０
．４４）粉末、ＴｉＣ粉末、ＴｉＮ粉末、ＴａＣ粉末を
用意し、さらに平均粒径：５．５μｍのＷＣ粉末、平均
粒径：１．２μｍのＣｏ粉末を用意し、これら原料粉末
を表１に示される組成となるように配合し、ボールミル
にて７２時間湿式混合したのち、鉱山・建設用工具のビ
ットに取付けるボタン型超硬合金チップの形状にプレス
成形し、圧粉体Ａ〜Ｈを作製した。[0011] As raw material powder, average particle size: 1μ
m of (Ti0.58, W0.42)C powder, (Ta0.
83, Nb0.17) C powder, Ti(C0.56, N0
．． 44) Prepare powder, TiC powder, TiN powder, TaC powder, and further prepare WC powder with an average particle size of 5.5 μm and Co powder with an average particle size of 1.2 μm. These raw material powders are shown in Table 1. After wet mixing in a ball mill for 72 hours, the powder was press-formed into the shape of a button-shaped cemented carbide chip to be attached to the bit of a mining or construction tool to produce green compacts A to H. .
【００１２】これら圧粉体Ａ〜Ｈを表２に示される条件
で焼結したのち冷却し、本発明ＷＣ基超硬合金チップ１
〜４および従来ＷＣ基超硬合金チップ１〜４を作製し、
これらチップを１０°の斜面となるように研摩し、この
研摩斜面全域を荷重：２００ｇでマイクロビッカース硬
さを測定することにより、表面から１２００μｍまでの
深さの硬さを測定し、その硬さ分布を図１および図２に
示した。These green compacts A to H were sintered under the conditions shown in Table 2 and then cooled to form WC-based cemented carbide chips 1 of the present invention.
~4 and conventional WC-based cemented carbide chips 1 to 4 were produced,
These chips were polished to form a 10° slope, and the micro-Vickers hardness was measured with a load of 200 g over the entire polished slope, and the hardness at a depth of 1200 μm from the surface was measured. The distribution is shown in Figures 1 and 2.
【００１３】上記図１および図２に示されるチップ表面
部から中心部に至る硬さ分布を有した本発明ＷＣ基超硬
合金チップ１〜４および従来ＷＣ基超硬合金チップ１〜
４を穿岩機のビットとして用い、表３に示される種類の
岩石を穿岩し、穿岩初期段階でビットの欠損の有無を調
べ、欠損のない場合に岩盤に穿岩機のビットを押付け、
穿岩長さを測定して、ビットの穿岩性能をテストし、そ
の結果を表３に示した。The WC-based cemented carbide chips 1 to 4 of the present invention and the conventional WC-based cemented carbide chips 1 to 4 have the hardness distribution from the chip surface to the center shown in FIGS. 1 and 2 above.
4 as a bit of a rock drilling machine, drill the types of rocks shown in Table 3, check for defects in the bit at the initial stage of drilling, and if there is no defect, press the bit of the rock drilling machine against the rock. ,
The rock drilling length was measured to test the rock drilling performance of the bit, and the results are shown in Table 3.
【００１４】表３の結果から、従来ＷＣ基超硬合金チッ
プをビットとして用いると岩質によっては穿岩初期にビ
ットが欠損することがあるが、本発明ＷＣ基超硬合金チ
ップをビットとして用いると岩質に関係なくビット欠損
が発生することがなく、穿岩長さが長いところから穿岩
性能も優れていることがわかる。From the results in Table 3, it can be seen that when conventional WC-based cemented carbide tips are used as bits, the bits may break at the initial stage of rock drilling depending on the rock quality, but when the WC-based cemented carbide tips of the present invention are used as bits. It can be seen that the drilling performance is excellent because no bit loss occurs regardless of the rock quality, and the drilling length is long.
【００１５】[0015]
【表１】[Table 1]
【００１６】[0016]
【表２】[Table 2]
【００１７】[0017]
【表３】[Table 3]
【００１８】[0018]
【発明の効果】この発明のＷＣ基超硬合金を鉱山・建設
用工具、例えば穿岩用ビットとして用いると、岩質に関
係なく優れた穿岩性能を発揮し、熟練者による岩質に応
じた硬さのビットを選択する必要もないなどの優れた効
果を奏するものである。[Effects of the Invention] When the WC-based cemented carbide of the present invention is used as a mining/construction tool, such as a rock drilling bit, it exhibits excellent rock drilling performance regardless of rock quality, and can be This provides excellent effects such as eliminating the need to select a bit with a certain hardness.
【図１】この発明のＷＣ基超硬合金チップの硬さ分布を
示すグラフ。FIG. 1 is a graph showing the hardness distribution of the WC-based cemented carbide tip of the present invention.
【図２】従来のＷＣ基超硬合金チップの硬さ分布を示す
グラフ。FIG. 2 is a graph showing the hardness distribution of a conventional WC-based cemented carbide tip.
Claims (2)
）からなる第１硬質分散相、並びに鉄族金属のうちの１
種または２種以上を主成分とする結合相および不可避不
純物からなるＷＣ基超硬合金製鉱山・建設用工具におい
て、上記ＷＣ基超硬合金製鉱山・建設用工具の表面部の
硬さは、中心部の硬さより低い硬さ分布を有することを
特徴とする炭化タングステン基超硬合金製鉱山・建設用
工具。Claim 1: A first hard dispersed phase consisting of tungsten carbide (hereinafter referred to as WC) and one of iron group metals.
In a mining/construction tool made of WC-based cemented carbide, the hardness of the surface portion of the mining/construction tool made of WC-based cemented carbide is composed of a binder phase mainly composed of one or more species and unavoidable impurities. A mining and construction tool made of tungsten carbide-based cemented carbide, which is characterized by having a hardness distribution lower than the hardness of the center part.
律表の４ａ，５ａおよび６ａ族金属の１種または２種以
上の炭化物および／または炭窒化物からなる第２硬質分
散相、並びに鉄族金属のうちの１種または２種以上を主
成分とする結合相および不可避不純物からなるＷＣ基超
硬合金製鉱山・建設用工具において、上記ＷＣ基超硬合
金製鉱山・建設用工具の表面部の硬さは、中心部の硬さ
より低い硬さ分布を有することを特徴とする炭化タング
ステン基超硬合金製鉱山・建設用工具。2. A first hard dispersed phase consisting of WC, a second hard dispersed phase consisting of one or more carbides and/or carbonitrides of metals from groups 4a, 5a and 6a of the periodic table, and A WC-based cemented carbide mining/construction tool comprising a binder phase containing one or more iron group metals as a main component and inevitable impurities, wherein the WC-based cemented carbide mining/construction tool described above is A mining and construction tool made of tungsten carbide-based cemented carbide, characterized in that the hardness of the surface part has a lower hardness distribution than the hardness of the center part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7383091A JPH04285287A (en) | 1991-03-13 | 1991-03-13 | Mining and construction tool made of tungsten carbide hard alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7383091A JPH04285287A (en) | 1991-03-13 | 1991-03-13 | Mining and construction tool made of tungsten carbide hard alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04285287A true JPH04285287A (en) | 1992-10-09 |
Family
ID=13529454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7383091A Pending JPH04285287A (en) | 1991-03-13 | 1991-03-13 | Mining and construction tool made of tungsten carbide hard alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04285287A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013002270A1 (en) * | 2011-06-27 | 2013-01-03 | 京セラ株式会社 | Hard alloy and cutting tool |
-
1991
- 1991-03-13 JP JP7383091A patent/JPH04285287A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013002270A1 (en) * | 2011-06-27 | 2013-01-03 | 京セラ株式会社 | Hard alloy and cutting tool |
| CN103635599A (en) * | 2011-06-27 | 2014-03-12 | 京瓷株式会社 | Hard alloy and cutting tool |
| JPWO2013002270A1 (en) * | 2011-06-27 | 2015-02-23 | 京セラ株式会社 | Hard alloys and cutting tools |
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