JPH047201Y2 - - Google Patents
Info
- Publication number
- JPH047201Y2 JPH047201Y2 JP16915887U JP16915887U JPH047201Y2 JP H047201 Y2 JPH047201 Y2 JP H047201Y2 JP 16915887 U JP16915887 U JP 16915887U JP 16915887 U JP16915887 U JP 16915887U JP H047201 Y2 JPH047201 Y2 JP H047201Y2
- Authority
- JP
- Japan
- Prior art keywords
- floorboard
- rail
- floorboards
- movable
- hardness
- 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.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001669679 Eleotris Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- -1 that is Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Floor Finish (AREA)
- Railway Tracks (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は枕木とレールとの間へ介在させる床
板に関し、特に鉄道分岐器のポイントや可動Ｋ字
クロツシングの転換部のように可動するレールが
載置される床板に関する。[Detailed description of the invention] (Field of industrial application) This invention relates to floorboards interposed between sleepers and rails, and is particularly applicable to movable rails such as railway turnout points and transition parts of movable K-crossings. Regarding the floorboard on which it is placed.
（従来の技術）
鉄道分岐器のポイントにおけるトングレールや
可動Ｋ字クロツシングの転換部における可動レー
ル等、各種の可動するレールは床板の表面を摺動
する。例えば、第４図示の鉄道分岐器のポイント
にあつては、枕木ｂへ床板ａが固定され、床板ａ
へレールｃが締結装置ｄにより固定され、また可
動するレールｅが床板ａ上へ載置されるとともに
後端継目部ｆにおいて各種締結装置ｇにより可動
自在の状態で床板ｉに取り付けられている。そし
て第４図の矢印で示すように転てつ棒ｈを移動さ
せると、可動するレールｅが床板ａ上を摺動す
る。なお、第４図にあつては複数個の床板の構
造、各種締結装置ｇ、転てつ棒ｈ等の詳細構造に
ついて省略してある。BACKGROUND OF THE INVENTION Various types of movable rails, such as tongue rails at railway turnout points and movable rails at transitions of movable K-crossings, slide over the surface of floorboards. For example, at the point of the railway turnout shown in Figure 4, the floorboard a is fixed to the sleeper b, and the floorboard a
A rail c is fixed by a fastening device d, and a movable rail e is placed on the floorboard a and movably attached to the floorboard i at a rear end joint f by various fastening devices g. When the rolling pin h is moved as indicated by the arrow in FIG. 4, the movable rail e slides on the floor plate a. In addition, in FIG. 4, detailed structures such as the structure of the plurality of floor plates, various fastening devices g, and the switch rod h are omitted.
このようなレール摺動部において、従来の床板
は低炭素鋼で形成されている。 In such rail sliding parts, conventional floor plates are made of low carbon steel.
（考案が解決しようとする問題点）
従来の床板は低炭素鋼つまり軟鋼で形成されて
おり、硬度が低いため、可動するレールのすべり
摩擦によつて摩耗しやすい。(Problems to be solved by the invention) Conventional floorboards are made of low-carbon steel, that is, mild steel, and because of their low hardness, they are easily worn out by the sliding friction of moving rails.
また散水や雨水により発錆したり、車輪からの
鉄粉が付着した場合、床板の摩擦係数が増加する
が、この状態で可動するレールを摺動すると、従
来例は硬度が低いため、より摩耗が促進される。 In addition, if the floorboard becomes rusty due to water spraying or rainwater, or if iron powder from the wheels adheres to it, the coefficient of friction of the floorboard will increase, but if you slide on a movable rail in this condition, the hardness of the conventional example is low, so it will wear more. is promoted.
さらに降雪地においては、融雪のため地下水に
よる散水が行なわれているが、地下水に含まれて
いる砂が床板に付き、床板の摩擦係数は著しく増
大する。ここに従来例のような硬度が低い床板上
を可動するレールが摺動すると、かじりを生じた
り、傷がついたりして可動するレールが転換支障
を起こすおそれがる。 Furthermore, in snowy areas, watering using groundwater is performed to melt snow, but sand contained in the groundwater sticks to the floorboards, significantly increasing the coefficient of friction of the floorboards. If a movable rail slides on a floor board with low hardness, as in the conventional example, there is a risk that the movable rail may be galled or scratched, causing a problem in conversion.
（問題点を解決するための手段）
この考案はこれらの不都合を解消するもので、
すなわち鋼材製の床板本体の表面へ窒化層を形成
することを特徴とするものである。(Means for solving the problems) This idea solves these inconveniences.
That is, it is characterized by forming a nitrided layer on the surface of the steel floorboard body.
（実施例）
JIS、規格番号G3101、記号SS41の低炭素鋼
（Ｃ…0.15％、Si…0.24％、Mn…0.49％、Ｐ…
0.018％、Ｓ…0.004％を含む鉄）をもつて細長板
状（縦400mm〜700mm、幅150mm〜200mm、厚さ25
mm）の床板本体１を形成する。この床板本体１の
表面には摺動面３、レールｃの係止溝４、締結装
置ｄを構成するレールブレス５の係止溝６を形成
し、係止溝４，６間へ締結ボルト７の挿通孔８を
設け、床板本体１の両端へは犬釘９，９…の挿通
孔１０，１０…を設ける。そして床板本体１の全
表面へガス軟窒化法により窒化層２を形成する。
さらに具体的には、アンモニアガス（NH3）を
50％とプロパンガス、ブタンガス等の吸熱型変成
ガスを50％との雰囲気中において、前記構造の床
板本体１を570°Cで約２時間加熱し、その後油冷
する。ここに床板本体１の全表面から窒素および
炭素が浸入し、全表面に窒化層２が生成する。こ
の窒化層２は化合物層２０と拡散層２１とより成
り、最表面の化合物層２０は炭窒化物〔ε−
Fe2-3（Ｃ，Ｎ）を主体とする炭窒化物で、若干の
r′−Fe4Ｎが存在する〕が生成されたもので、硬
度が高く、また化合物層２０より深さ0.3mm〜１
mm位内部に生成された拡散層２１は窒素（Ｎ）が
拡散され、粒状折出物が生成されたものである。(Example) JIS, standard number G3101, symbol SS41 low carbon steel (C...0.15%, Si...0.24%, Mn...0.49%, P...
Iron containing 0.018%, S...0.004%) in the form of a long and thin plate (length: 400 mm to 700 mm, width: 150 mm to 200 mm, thickness: 25 mm)
mm) to form the floorboard body 1. A sliding surface 3, a locking groove 4 for the rail c, and a locking groove 6 for the rail brace 5 constituting the fastening device d are formed on the surface of the floorboard body 1, and a fastening bolt 7 is inserted between the locking grooves 4 and 6. An insertion hole 8 is provided, and insertion holes 10, 10, . . . for dog nails 9, 9, . . . are provided at both ends of the floorboard body 1. A nitrided layer 2 is then formed on the entire surface of the floorboard body 1 by gas soft nitriding.
More specifically, ammonia gas (NH 3 )
The floor plate main body 1 having the above structure is heated at 570° C. for about 2 hours in an atmosphere containing 50% endothermic modified gas such as propane gas or butane gas for about 2 hours, and then cooled in oil. Nitrogen and carbon infiltrate here from the entire surface of the floorboard main body 1, and a nitrided layer 2 is generated on the entire surface. This nitride layer 2 consists of a compound layer 20 and a diffusion layer 21, and the outermost compound layer 20 is made of carbonitride [ε-
Carbonitride mainly composed of Fe 2-3 (C,N), with some
r'-Fe 4 N], has high hardness, and has a depth of 0.3 mm to 1 mm below the compound layer 20.
The diffusion layer 21 formed within about mm is the result of diffusion of nitrogen (N) and the formation of granular precipitates.
そして従来の床板つまり表面無処理床板の表面
硬度がHmV（0.1）120程度であるのに対し、この
実施例の床板の表面硬度はHmV（0.1）600〜650
であり、遥かに硬く、可動するレールｅが摺動面
３上を摺動しても摩耗しにくく、たとえ摺動面３
上へ錆、鉄粉等が付着したり、砂が付き、当該状
態において可動するレールｅが摺動しても摩耗が
促進されることはなく、傷がついたり、かじりを
生じたりすることもほとんどなくなり、またこの
実施例の床板の方が従来の無処理床板よりも耐腐
食性も大きい。 And while the surface hardness of conventional floorboards, that is, untreated floorboards, is about HmV (0.1) 120, the surface hardness of the floorboard of this example is HmV (0.1) 600 to 650.
, it is much harder and less likely to wear even if the movable rail e slides on the sliding surface 3.
Even if rust, iron powder, etc. adhere to the top, or sand adheres to the top, and the movable rail e slides under such conditions, wear will not be accelerated, and scratches or galling may occur. The corrosion resistance of the floorboard of this example is also greater than that of conventional untreated floorboards.
（考案の効果）
この考案は表面に窒化層を有するので、従来例
よりも硬度が遥かに高く、耐摩性、耐傷つき性、
耐かじり性が著しく大きく、可動するレールの転
換支障を生ずるおそれもなく、可動するレールの
摺動部に設置される床板として最適であり、しか
も窒化層を有するため耐食性も大きく、床板とし
ての耐用年数も延長させることができるものであ
る。(Effects of the invention) Since this invention has a nitrided layer on the surface, it has much higher hardness than conventional examples, and has excellent wear resistance, scratch resistance,
It has extremely high galling resistance, and there is no risk of causing trouble in changing the moving rail, making it ideal as a floorboard installed on the sliding parts of moving rails.Furthermore, it has a nitrided layer, so it has high corrosion resistance, making it durable as a floorboard. The number of years can also be extended.
図はこの考案の実施例を示すもので、第１図は
縦断面図、第２図は部分拡大断面図、第３図は平
面図、第４図は使用状態の平面図、第５図はＡ−
Ａ拡大断面図である。
１……床板本体、２……窒化層。
The figures show an embodiment of this invention; Fig. 1 is a longitudinal sectional view, Fig. 2 is a partially enlarged sectional view, Fig. 3 is a plan view, Fig. 4 is a plan view in use, and Fig. 5 is a plan view of the device in use. A-
It is an enlarged sectional view of A. 1...Floor plate body, 2...Nitrided layer.
Claims (1)
とを特徴とするレール摺動部用床板。 A floor plate for a rail sliding part, characterized in that a nitrided layer is formed on the surface of a steel floor plate body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16915887U JPH047201Y2 (en) | 1987-11-04 | 1987-11-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16915887U JPH047201Y2 (en) | 1987-11-04 | 1987-11-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0175103U JPH0175103U (en) | 1989-05-22 |
| JPH047201Y2 true JPH047201Y2 (en) | 1992-02-26 |
Family
ID=31458964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16915887U Expired JPH047201Y2 (en) | 1987-11-04 | 1987-11-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH047201Y2 (en) |
-
1987
- 1987-11-04 JP JP16915887U patent/JPH047201Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0175103U (en) | 1989-05-22 |
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