JPH0813980B2 - 鋼の熱間圧延潤滑剤組成物 - Google Patents

鋼の熱間圧延潤滑剤組成物

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Publication number
JPH0813980B2
JPH0813980B2 JP1134323A JP13432389A JPH0813980B2 JP H0813980 B2 JPH0813980 B2 JP H0813980B2 JP 1134323 A JP1134323 A JP 1134323A JP 13432389 A JP13432389 A JP 13432389A JP H0813980 B2 JPH0813980 B2 JP H0813980B2
Authority
JP
Japan
Prior art keywords
heat insulating
insulating agent
temperature
agent
less
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 - Lifetime
Application number
JP1134323A
Other languages
English (en)
Other versions
JPH0284492A (ja
Inventor
昌敬 白田
正義 ▲榊▼原
宏 上屋舗
隆郎 倉橋
孝彦 甲賀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyodo Yushi Co Ltd
Nippon Steel Corp
Original Assignee
Kyodo Yushi Co Ltd
Nippon Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyodo Yushi Co Ltd, Nippon Steel Corp filed Critical Kyodo Yushi Co Ltd
Priority to EP89907268A priority Critical patent/EP0453565B1/en
Priority to DE68924075T priority patent/DE68924075T2/de
Priority to AU38334/89A priority patent/AU625675B2/en
Priority to PCT/JP1989/000591 priority patent/WO1989012669A1/ja
Priority to KR1019900700275A priority patent/KR920005534B1/ko
Priority to CA002002036A priority patent/CA2002036A1/en
Publication of JPH0284492A publication Critical patent/JPH0284492A/ja
Priority to US08/266,784 priority patent/US5437802A/en
Publication of JPH0813980B2 publication Critical patent/JPH0813980B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
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Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、鋼の熱間圧延潤滑剤組成物に関し、基油ま
たは基グリースに特定の断熱剤を添加することにより、
被圧延材からワークロールへの熱伝達を停止し、ワーク
ロールのサーマルクラウン低減効果を有する改良された
潤滑剤組成物に関するものである。
（従来の技術） 従来、熱間圧延ではロールの保護のため、ロール冷却
水のみが使用されていたが、近年、圧延荷重の低減、ロ
ール摩耗減少のため圧延油が使用され多大な効果を収め
ている。
（発明が解決しようとする課題） ところが、今までの熱間圧延潤滑剤は、使用目的がワ
ークロール摩耗低減、ロール肌改善が主流であった。こ
れは、今まで圧延製品の品質に対する要求が比較的穏や
かなため、ワークロールのサーマルクラウンがあまり重
要視されなかったことによる。しかし、最近、製品の高
品質化が叫ばれ製品の品質に直接影響するワークロール
のサーマルクラウン低減が重要になって来た。
（課題を解決するための手段） 本発明は、基油または基グリースに断熱剤を加えたこ
とを特徴とする鋼の熱間圧延潤滑剤組成物に関するもの
で、特に、断熱剤として特定の二種類のもの、即ち、
（Ａ）1200℃以下の温度で吸熱融解する無機化合物およ
び（Ｂ）1200℃以下の温度では融解または分解せず室温
での熱伝導率が0.01（cal/cm・Ｓ・℃）以下で摩擦係数
が0.7以下である無機粉体を組合せて組成物中に特定量
加えることで優れた断熱効果が得られるワークロールの
サーマルクラウン防止に有効であることを知見し、本発
明を達成するに至った。
本発明のにおいては基油または基グリースに（Ａ）と
（Ｂ）との性状の異なる断熱剤を組合せて加え、その相
乗効果により断熱性を高めたものである。
グリースは油に較べて高温における流動性が少なく、
本来高温における断熱性が優れているものであるから、
基グリースに断熱剤（Ａ）と（Ｂ）とを組合せて加えれ
ばその相乗効果と相まって最も優れた効果をあげる事が
できる。
また、本発明においては、基油または基グリースに断
熱剤（Ａ）と（Ｂ）に加えて極圧剤および／または固体
潤滑剤を添加することにより潤滑性の向上を計ることが
出来た。
本発明の潤滑剤組成物には、さらに極圧剤および／ま
たは固体潤滑剤を添加することにより、基油ベースに比
べ、潤滑性、断熱性、貯蔵安定性、作業性、耐水洗性を
向上させることが出来た。
（作 用） ワークロールは被圧延材と接触することにより、ロー
ル表面温度が約800℃まで上昇する。一方、今までの熱
間圧延用潤滑剤の多くは、鉱油、油性剤、極圧添加剤お
よび固体潤滑剤の組み合せで構成されており、潤滑性に
対する考慮はなされていたが、断熱（圧延材からワーク
ロールへの熱伝達を防げる）に対する考慮がなされてい
なかった。
一方、特開昭60−6211号公報には、常圧下での融点が
1200℃以下、平均粒径が１μｍ以下で、鋳鉄、鋳鋼を含
む鉄鋼およびその他の金属に対する腐食性がなく、かつ
熱の不良導性物質として機能する無機化合物の微粉末を
市販の熱間圧延油（液体）に添加することによりロール
を保護できることが示されている。
しかし、上記公開特許公報に示されている基油は、市
販の熱間圧延油（液体）であり、本発明で使用するグリ
ースとは異なっている。又使用される粉体は1200℃以下
の温度で融解する無機化合物粉体であり、融解後は熱伝
達低下性が急減する。
そこで本発明においては、基油または基グリースに12
00℃以下の温度で吸熱融解する無機化合物と、1200℃以
下の温度では融解または分解しない無機粉体とを組合せ
て加え、これによりさらに断熱性を高めたものである。
すなわち、本発明で使用する断熱剤（Ａ）は1200℃以
下の温度で吸熱、融解する無機化合物である縮合リン酸
塩、塩化ナトリウムおよびケイ酸ナトリウムからなる群
から選択され、断熱剤（Ｂ）は1200℃以下の温度では融
解または分解せず、かつ室温での熱伝導率が0.01（cal/
cm・Ｓ・℃）以下で摩擦係数が0.7如何である無機粉末
である窒化ケイ素、無定形炭素および二酸化ケイ素の各
粉末からなる群から選択され、かつ断熱剤（Ａ）と断熱
剤（Ｂ）との組合せが縮合リン酸塩と窒化ケイ素、縮合
リン酸塩と無定形炭素、縮合リン酸塩と二酸化ケイ素、
塩化ナトリウムと窒化ケイ素、ケイ酸ナトリウムと窒化
ケイ素の各組合せからなる群から選択されるものであ
る。なお縮合リン酸塩は（KPO3）n,（NaPO3）n,K4P2O7
等の縮合リン酸塩が好適である。なお、ここで規定した
摩擦係数は、ピン・オン・ディスク法（直径11mmの円板
に直径3mmの先端平面状の棒を荷重1kgfで押し付け、速
度0.01（m/S）ですべらせる）で求めた。
又、断熱剤の平均粒径としては50μｍ以下であれば使
用可能であるが、ロールと被圧延材の間隙を考慮すると
平均粒径１μｍ以下がより好ましい。
ここで、（Ａ）1200℃以下で吸熱融解する無機化合物
と（Ｂ）1200℃以下では融解又は分解せず熱伝導率が0.
01（cal/cm・Ｓ・℃）以下で摩擦係数が0.7以下である
無機粉体を併用した方が良い理由は明確にされた訳では
ないが、以下の様に考えている。すなわち、圧延時ロー
ルバイト内は高温高圧（600℃以上、2000kgf/cm2以上）
になる。その際断熱剤（Ａ）は速やかに吸熱融解し被圧
延材からワークロールへの熱伝達を防げる。しかし、一
般に液体は粉体より熱伝導率が増大することが知られて
おり、断熱剤（Ａ）の熱伝達低減効果も融解により急激
に低下すると考える。一方、断熱剤（Ｂ）は高温、高圧
下でも融解又は分解しないためローバイト中でも粉体を
存在しワークロールと被圧延材の接触を妨げ、かつ本粉
体自身が潤滑性を有していることよりローバイト内での
摩擦発熱を低減させるためと考える。
すなわち、断熱剤（Ａ）は断熱性に優れているが、高
温で融解すると断熱性が急激に低下する。一方断熱剤
（Ｂ）は1200℃以下では融解または分解しないため広い
温度領域にわたり断熱性を有している。従って断熱剤
（Ａ）と断熱剤（Ｂ）を特定の比率で共存させることに
より両効率が共に優れる潤滑剤を始めて知り得ることが
できたのである。
又、断熱剤の添加量は５〜50重量％が適当であり、よ
り好ましくは10〜40重量％である。５重量％未満では断
熱効果に乏しく、一方50重量％より多くなると潤滑剤の
粘性が大きくなり給脂性が損なわれてしまう。なお、断
熱剤中の（Ａ），（Ｂ）の比は49:1〜1:49が適当である
が、より好ましくは19:1〜1:4である。この理由として
は、断熱剤（Ａ）の比が小さくなるとロールバイト内で
の吸熱による断熱性が低下し、遂に、断熱剤（Ｂ）の比
が小さくなると高温断熱性が低下するためである。
本発明で使用可能な基油としては、スピンドル油，マ
シン油，ダイナモ油，モーター油，シリンダー油，ブラ
イトストック等の中質および重質鉱油、牛脂，ラード，
鯨油，パーム油，ヤシ油，ナタネ油，米ヌカ油，大豆油
等の動植物油脂、８〜22個の炭素原子を有する脂肪酸と
１価および多価アルコールとのエステル，α−オレフィ
ン，ポリブテン，シリコーン油，フッ素油等の合成油お
よびこれら混合油があげられる。
本発明で使用可能な基グリースとしては、リチウム石
ケングリース、カルシウム石ケングリース、ナトリウム
石ケングリース、アルミニウム石ケングリース、複合カ
ルシウム石ケングリース、ウレアグリース、ベントング
リース等があげられるが、耐熱性に優れるリチウム石ケ
ングリース、複合カルシウム石ケングリース、ウレアグ
リース、ベントングリースがより好ましい。
本発明で使用可能な固体潤滑剤としては、黒鉛（天
然，人造），二硫化モリブデン，雲母（天然，人造），
フッ化黒鉛、窒化ホウ素，軟質金属（金，銀，銅等），
滑石等の無機系固体潤滑剤および、PTFE（四フッ化エチ
レン）,MCA（メラミンとシアヌル酸付加物），フタロシ
アニン等の有機系固体潤滑剤のいずれでも使用可能であ
るが、耐熱性及び高温での酸化安定性に優れかつ、被圧
延材への影響が少ない黒鉛（天然，人造）、雲母（天
然，人造）、窒化ホウ素、滑石等がより好ましい。固体
潤滑剤の添加量は０〜40重量％が適当であり、より好ま
しくは５〜15重量％である。なお、40重量％を超えると
潤滑剤の粘性が大きくなり給脂性が低下する。
本発明で使用可能な極圧添加剤としては、硫黄系化合
物、リン系化合物、塩素系化合物、有機金属化合物等が
あげられるが、発錆等の影響が少ない硫黄系化合物、リ
ン系化合物、有機金属化合物がより好ましい。極圧添加
剤の添加量は０〜20重量％が適当であり、より好ましく
は0.5〜10重量％である。添加量が20重量％を超える
と、腐食性が現われるとかグリースのミセル構造が不安
定になる等の副作用を生じる。
（実施例） 次に、本発明を実施例及び比較例により説明する。
実施例１〜16,比較例１〜13 基油、基グリース、断熱剤および極圧添加剤、固体潤
滑剤を第１表に示す配合率で配合して実施例１〜16、比
較例１〜13の潤滑剤を作った。これ等の組成物につき、
次に示す試験方法で性能を評価し、得た結果を第１表に
併記する。
（性能試験方法） Ａ）Ｅ−12型熱間潤滑性能試験機による潤滑性能試験 Ｅ−12型熱間潤滑性能試験機の原理は、両端を固定後
誘導加熱した試験片を給油しながらロールではさみスリ
ップ潤滑し、各種潤滑剤の摩擦係数と耐焼付き性能を調
べ潤滑性の評価を行なうものである。
（T:軸トルク、R:ロール半径、W:負荷荷重） なお、試験機の概要及び試験条件は下記の通りであ
る。
イ）型式:2段式すべり潤滑試験機 ロ）ロール寸法：直径124mm×長さ80mm ハ）ロール材質：ハイクロムロール（Hs＝70〜75） ニ）試験片材質:SS−41（縦20×横20×長さ580mm） ホ）試験片温度:400,600,800℃（自動温度調節） ヘ）速度:200rpm ト）圧下荷重:500〜3000kgf（500kgf毎に荷重を増大） チ）潤滑剤供給方法：ハケ塗り Ｂ）防錆性試験 イ）Ａ）で用いた試験片を20×20×100（mm）の試験片
に切断加工する。
ロ）イ）の試験片を軒下につるし、２週間放置後の錆発
生の有無、を調べる。
発錆なし 発錆大 ○ × Ｃ）耐水洗性試験 イ）脱脂計量済みの鋼板（SPCC−SD,100×100×0.8（m
m））に潤滑剤30±３（mg）を均一に塗布する。
ロ）イ）の鋼板を下記条件にて水洗し、水洗後の重量を
求め、残油率を求める。
イ）ノズル型番:1/4 KBFO 865 ロ）吐出量:6.4/min（吐出圧:2.0kgf/cm2） ハ）水洗時間:5秒（水温:25℃） ニ）鋼板とノズルの距離:200mm Ｄ）金属間接触熱伝達比の測定 イ）試験片材質:WT−60（直径25mm×長さ50mm） ロ）温度：高温材780℃ 低温材22〜30℃ ハ）熱電対:CA（0.5mm）シース（取付位置1.5,3.0mm） ニ）断熱材：カオウール ホ）圧縮力:500kgf/cm2 ヘ）試料の充填方法及び厚さ： 第１図に示すように試料１に塗り付けた低温材２に高
温材３を押し付け、接触後の両試料の温度の時間的変化
から、各試料の接触界面温度と熱流速を逆算し、ニュー
トン（Newton）の冷却法則を拡大適用し、金属間熱伝達
係数を求め、更に、その係数を試料なしの場合と比較し
熱伝達比とする。
尚、第１図において４は断熱材、５は熱電対を示す。
Ｅ）実機圧延機でのロール摩耗量比 F5スタンド（６スタンドミル）入側上ワークロールに
エアスプレーノズル８個（20ml/分・ノズル）を取り付
け、ニッケールグレンロールを用い一般材、約300トン
を圧延しロール摩耗量を測定し、現用油剤との摩耗量比
較を行う。
（発明の効果） 本発明の効果を要約すれば以下の通りである。
基油または基グリースに断熱剤（Ａ）および／または
断熱剤（Ｂ）を添加したことにより、被圧延材からワー
クロールへの熱伝達を抑制出来る。従って、熱によるワ
ークロールの損傷およびワークロールのサーマルクラウ
ンを減少出来る。
【図面の簡単な説明】
第１図は、金属間接触熱伝達化の測定方法の説明図であ
る。 １……試料、２……低温材 ３……高温材、４……断熱剤 ５……熱電対
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ１０Ｍ 125:24 125:26） Ｃ１０Ｎ 10:02 20:00 Ａ 30:00 Ｚ 40:24 Ｚ 50:10 (72)発明者 倉橋 隆郎 北海道室蘭市仲町12番地 新日本製鐵株式 会社室蘭製鐵所内 (72)発明者 甲賀 孝彦 北海道室蘭市仲町12番地 新日本製鐵株式 会社室蘭製鐵所内 (56)参考文献 特開 昭59−81394（ＪＰ，Ａ) 特開 昭51−147448（ＪＰ，Ａ) 特開 昭61−223096（ＪＰ，Ａ) 特開 昭49−32861（ＪＰ，Ａ)

Claims (2)

    【特許請求の範囲】
  1. 【請求項１】基油または基グリースに、断熱剤（Ａ）と
    断熱剤（Ｂ）との組合せを加えた鋼の熱間圧延潤滑剤組
    成物において、断熱剤（Ａ）が1200℃以下の温度で吸
    熱、融解する無機化合物である縮合リン酸塩、塩化ナト
    リウムおよびケイ酸ナトリウムからなる群から選択さ
    れ、断熱剤（Ｂ）が1200℃以下の温度では融解または分
    解せず、かつ室温での熱伝導率が0.01（cal/cm・Ｓ・
    ℃）以下で摩擦係数が0.7以下である無機粉末である窒
    化ケイ素、無定形炭素および二酸化ケイ素の各粉末から
    なる群から選択され、かつ断熱剤（Ａ）と断熱剤（Ｂ）
    との組合せが縮合リン酸塩と窒化ケイ素、縮合リン酸塩
    と無定形炭素、縮合リン酸塩と二酸化ケイ素、塩化ナト
    リウムと窒化ケイ素およびケイ酸ナトリウムと窒化ケイ
    素の各組合せからなる群から選択され、かつ断熱剤中の
    （Ａ）（Ｂ）の重量比が49:1〜1:49であり、断熱剤の添
    加量が５〜50重量％であることを特徴とする鋼の熱間圧
    延潤滑剤組成物。
  2. 【請求項２】基油または基グリースに、請求項１記載の
    断熱剤（Ａ）および（Ｂ）を加え、更に極圧添加剤およ
    び／または固体潤滑剤を加えたことを特徴とする請求項
    １記載の鋼の熱間圧延潤滑剤組成物。
JP1134323A 1988-06-14 1989-05-26 鋼の熱間圧延潤滑剤組成物 Expired - Lifetime JPH0813980B2 (ja)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP89907268A EP0453565B1 (en) 1988-06-14 1989-06-13 Lubricant composition for hot-rolling of steel
DE68924075T DE68924075T2 (de) 1988-06-14 1989-06-13 Schmiermittelzubereitung für heizwalzen von stahl.
AU38334/89A AU625675B2 (en) 1988-06-14 1989-06-13 Lubricant composition for hot-rolling of steel
PCT/JP1989/000591 WO1989012669A1 (fr) 1988-06-14 1989-06-13 Compose lubrifiant pour le laminage a chaud de l'acier
KR1019900700275A KR920005534B1 (ko) 1988-06-14 1989-06-13 강의 열간압연 윤활제 조성물
CA002002036A CA2002036A1 (en) 1989-05-26 1989-11-01 Lubricating composition for hot-rolling steel
US08/266,784 US5437802A (en) 1988-06-14 1994-06-28 Lubricating composition for hot-rolling steel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP14458888 1988-06-14
JP63-144588 1988-06-14

Publications (2)

Publication Number Publication Date
JPH0284492A JPH0284492A (ja) 1990-03-26
JPH0813980B2 true JPH0813980B2 (ja) 1996-02-14

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Country Link
US (1) US5437802A (ja)
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JPH0284492A (ja) 1990-03-26
KR900701979A (ko) 1990-12-05
KR920005534B1 (ko) 1992-07-06
US5437802A (en) 1995-08-01

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