JPH07303915A - Glass lubricant for hot extrusion - Google Patents
Glass lubricant for hot extrusionInfo
- Publication number
- JPH07303915A JPH07303915A JP6123273A JP12327394A JPH07303915A JP H07303915 A JPH07303915 A JP H07303915A JP 6123273 A JP6123273 A JP 6123273A JP 12327394 A JP12327394 A JP 12327394A JP H07303915 A JPH07303915 A JP H07303915A
- Authority
- JP
- Japan
- Prior art keywords
- glass
- hot extrusion
- glass lubricant
- extrusion
- lubricant
- 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.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
- Y02P40/57—Improving the yield, e-g- reduction of reject rates
Landscapes
- Extrusion Of Metal (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属素材の熱間押出加
工におけるダイス用のガラス潤滑剤に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass lubricant for dies used in hot extrusion of metal materials.
【０００２】[0002]
【従来の技術】従来、鉄鋼等の熱間加工法には種々の方
法が採用されているが、特にステンレス鋼や超合金等の
継目なし管や、普通鋼からステンレス鋼や超合金にわた
る形材の製造には熱間押出法が主力となっている。この
熱間押出法が実用化されたのは、潤滑剤としてガラスが
採用された事による。2. Description of the Related Art Conventionally, various methods have been adopted for hot working of steel and the like, but in particular seamless pipes such as stainless steel and superalloys, and profile materials ranging from ordinary steel to stainless steel and superalloys. The hot extrusion method is the main product for the production of. This hot extrusion method was put into practical use because glass was used as a lubricant.
【０００３】このように熱間押出法におけるガラス潤滑
剤の役割は大きく、その良否によって押出製品の表面性
状や寸法精度等の品質が大きく左右される。押出製品品
質に大きく影響を及ぼすガラス潤滑剤は、一般に珪酸ソ
ーダ（水ガラス）や他のバインダーによりガラス粉末を
円板状に固めたガラスディスクとしてビレットと押出後
の形状を決定するダイスとの間に使用される。As described above, the role of the glass lubricant in the hot extrusion method is great, and the quality of the extruded product, such as the surface properties and dimensional accuracy, greatly depends on its quality. The glass lubricant that greatly affects the quality of the extruded product is generally a glass disk formed by consolidating glass powder into a disk shape with sodium silicate (water glass) or other binder, between the billet and the die that determines the shape after extrusion. Used for.
【０００４】一般に潤滑性はガラスの粘度に依存し、こ
の粘度はガラス成分に左右されることから、従来は一般
的に加工温度における粘度が１０００〜１００００ｐｏ
ｉｓｅ（西郷，田村：機械の研究，３２，（１９８
０）， NO.１，ｐ．３９）であるＥガラス系（ＳｉＯ2
−Ａｌ2 Ｏ3 −ＣａＯ−Ｂ2 Ｏ3 −ＭｇＯ−Ｋ2 Ｏ系）
または窓ガラス系（Ｎａ2 Ｏ−ＣａＯ−ＭｇＯ−Ａｌ2
Ｏ3 系）が使用されている。Generally, the lubricity depends on the viscosity of the glass, and this viscosity depends on the glass component. Therefore, conventionally, the viscosity at the processing temperature is generally 1000 to 10000 po.
ise (Saigo, Tamura: Machinery Research, 32 , (198
0), NO.1, p. 39) which is an E glass type (SiO 2
-Al 2 O 3 -CaO-B 2 O 3 -MgO-K 2 O system)
Or window glass system (Na 2 O-CaO-MgO-Al 2
O 3 system) is used.
【０００５】[0005]
【発明が解決しようとする課題】これら窓ガラスやＥガ
ラス組成では、普通鋼ビレットによる単純形状且つ低押
出比の押出スケジュール形鋼の場合には、押出製品の寸
法精度や表面性状に大きな影響は見られないが、ステン
レス鋼や超合金等の場合には変形抵抗が大きくなり、加
工時のダイスへかかる面圧力が大きくなるため、単純形
状且つ低押出比でも潤滑性能が不十分となり、ビレット
とダイスとの焼付やダイスが過熱されて塑性流動を生ず
る現象（以下ダイス流れと称する）が発生し、ビレット
の表面性状や寸法精度が悪くなる欠点がある。With these window glass and E-glass compositions, in the case of an extrusion-scheduled shaped steel having a simple shape and a low extrusion ratio by a plain steel billet, the dimensional accuracy and surface quality of the extruded product are not significantly affected. Although it is not seen, in the case of stainless steel or superalloy, the deformation resistance becomes large and the surface pressure applied to the die during processing becomes large, so even if it has a simple shape and a low extrusion ratio, the lubrication performance becomes insufficient and There is a drawback that the billet surface with the die and the dimensional accuracy are deteriorated due to the phenomenon of seizing with the die and overheating of the die to cause plastic flow (hereinafter referred to as die flow).
【０００６】すなわち、前述した通り、一般に熱間押出
加工における主要潤滑剤であるダイス用のガラス潤滑剤
は、水ガラス等をバインダーとして粉末を円板形状に成
形して使用されるため、押出加工時にはダイスとビレッ
トとの間にミリメートル単位の厚さのガラス粉末層が介
在する。そしてガラス粉末層がビレットと接触する部分
にはガラスの溶融層が存在しており、この溶融層が潤滑
効果を発揮する。この時ガラス潤滑剤の成分が適正でな
いとダイス孔型の凸部（押出製品の凹部）へのガラス潤
滑剤の供給が不十分となるため、ガラスによるビレット
からの熱の遮断効果が無くなる。このためダイス凸部が
過熱され、押出圧力により押出の進行と共に孔型形状が
変化するため、押出製品のトップとボトムとで大きな寸
法変化が生じるのである。That is, as described above, the glass lubricant for dies, which is generally the main lubricant in the hot extrusion process, is used by molding powder into a disk shape using water glass or the like as a binder, so that the extrusion process is performed. Sometimes a layer of glass powder with a thickness in millimeters is interposed between the die and the billet. A molten layer of glass exists in the portion where the glass powder layer contacts the billet, and this molten layer exerts a lubricating effect. At this time, if the components of the glass lubricant are not appropriate, the glass lubricant is insufficiently supplied to the convex portions (recesses of the extruded product) of the die hole type, so that the effect of blocking the heat from the billet by the glass is lost. For this reason, the die convex portion is overheated, and the shape of the hole changes with the progress of extrusion due to the extrusion pressure, so that a large dimensional change occurs between the top and bottom of the extruded product.
【０００７】ガラス潤滑剤が不適当で単純形状形鋼押出
加工においてダイス流れが発生した場合の押出製品の断
面形状の例を図２に示す。図２から明らかなように、押
出製品１のトップ（ａ）とボトム（ｂ）とでは形状が大
きく変化している。FIG. 2 shows an example of the cross-sectional shape of the extruded product in the case where a die flow occurs in the simple shape shaped steel extrusion process due to an inappropriate glass lubricant. As is clear from FIG. 2, the shapes of the top (a) and the bottom (b) of the extruded product 1 are greatly changed.
【０００８】本発明は、熱間押出加工において押出製品
のトップからボトムにかけての寸法精度変動を小さくし
て歩留りを改善し、押出加工による製造可能範囲を拡大
するものである。The present invention reduces the dimensional accuracy variation from the top to the bottom of the extruded product in the hot extrusion process to improve the yield and expands the manufacturable range by the extrusion process.
【０００９】[0009]
【課題を解決するための手段】本発明は、重量パーセン
トで、ＣａＯ：１０〜２５％、Ａｌ2 Ｏ3 ：３〜１０
％、Ｋ2 Ｏ：１０〜３０％、残部がＳｉＯ2 および不可
避的混入物から成ることを特徴とする熱間押出加工用ガ
ラス潤滑剤である。The present invention SUMMARY OF], in weight percent, CaO: 10~25%, Al 2 O 3: 3~10
%, K 2 O: 10 to 30%, the balance being SiO 2 and unavoidable mixture, which is a glass lubricant for hot extrusion.
【００１０】[0010]
【作用】ＣａＯは高温で粘度を低減し、熱遮断により潤
滑効果を高めるために重量％で１０％以上必要である
が、多過ぎると粘度が高過ぎてダイス孔型凸部への潤滑
剤流入が阻止され、潤滑効果を無くしてしまうので上限
を２５％とする。望ましい範囲は１５〜２０％である。[Function] CaO needs to be 10% or more by weight% in order to reduce the viscosity at high temperature and enhance the lubricating effect by heat insulation. Is prevented and the lubricating effect is lost, so the upper limit is made 25%. A desirable range is 15 to 20%.
【００１１】Ａｌ2 Ｏ3 は耐潮解性を付与するために必
要であり、多過ぎると粘度調整が難しくなるので３〜１
０％とする。望ましくは５〜８％とする。Al 2 O 3 is necessary for imparting deliquescent resistance, and if it is too much, it becomes difficult to adjust the viscosity.
0% It is preferably 5 to 8%.
【００１２】粘度調整用にはアルカリ金属の酸化物が有
用であり、ビレットと反応しないものとしてＫ2 Ｏを添
加する。押出に適した粘度を得るために１０〜３０％と
する。望ましくは１５〜２０％とする。Alkali metal oxides are useful for adjusting the viscosity, and K 2 O is added because it does not react with the billet. It is 10 to 30% in order to obtain a viscosity suitable for extrusion. It is preferably set to 15 to 20%.
【００１３】以上の成分範囲とすることにより、従来焼
付やダイス流れ発生のために歩留り良く押出加工の出来
なかったステンレス鋼や超合金の押出において歩留りが
大幅に改善される。When the content of the components is within the above range, the yield is greatly improved in the extrusion of stainless steel or superalloy which could not be extruded with good yield due to seizure or die flow.
【００１４】[0014]
【実施例】以下、実施例について説明する。EXAMPLES Examples will be described below.
【００１５】押出力量４５０トンの能力の熱間押出装置
を用い、表１に示す押出条件で表２、表３に示す組成の
ガラス潤滑剤を使用して熱間押出加工を実施した。押出
後の押出製品の寸法評価結果も表２、表３に示す。評価
は、図１に示すように、押出製品１のトップとボトムの
ウエブ部肉厚分布図上最も変動の激しい箇所（図中矢
印）のボトム肉厚／トップ肉厚の寸法比で示した。Hot extrusion was carried out by using a hot extruder having an output of 450 tons and using the glass lubricants having the compositions shown in Tables 2 and 3 under the extrusion conditions shown in Table 1. The dimensional evaluation results of the extruded products after extrusion are also shown in Tables 2 and 3. As shown in FIG. 1, the evaluation is shown by the dimensional ratio of bottom wall thickness / top wall thickness at the most fluctuating portions (arrows in the drawing) on the top and bottom web portion wall thickness distribution chart of the extruded product 1.
【００１６】[0016]
【表１】 [Table 1]
【００１７】[0017]
【表２】 [Table 2]
【００１８】[0018]
【表３】 [Table 3]
【００１９】本発明例Ａ１は３種類の酸化物の下限量を
含有するガラス潤滑剤であり、本発明例Ａ２は上限量を
含有するガラス潤滑剤である。本発明例Ａ１の成分系に
おいてＣａＯを上限の２５％にしたものが本発明例Ｂ１
であり、また本発明例Ａ２の成分系のＣａＯを下限値１
０％にしたものが本発明例Ｂ２である。いずれにおいて
も寸法比は０．９５以上で、Ｅガラス及び比較例の０．
９０以下に比較して製品長手方向の寸法精度に大幅な向
上が見られた。Inventive Example A1 is a glass lubricant containing lower limit amounts of three kinds of oxides, and Inventive Example A2 is a glass lubricant containing upper limit amounts. Inventive Example B1 is the component system of Inventive Example A1 in which the upper limit of CaO is 25%.
And the lower limit of CaO of the component system of Inventive Example A2 is 1
Inventive example B2 was made 0%. In each case, the dimensional ratio was 0.95 or more, and the dimensional ratios of E glass and Comparative Example were 0.
Compared with 90 or less, the dimensional accuracy in the longitudinal direction of the product was significantly improved.
【００２０】３成分の下限成分系である本発明例Ａ１に
対してＡｌ2 Ｏ3 を増量した本発明例Ｃ１、上限成分系
である本発明例Ａ２に対してＡｌ2 Ｏ3 を減量した本発
明例Ｃ２については寸法比は各々０．９５、０．９６で
あり、寸法変動低減効果があった。The present invention example C1 in which the amount of Al 2 O 3 is increased relative to the present invention example A1 which is the lower limit component system of three components, and the amount of Al 2 O 3 is decreased in relation to the present invention example A2 which is the upper limit component system. Inventive Example C2 had a dimensional ratio of 0.95 and 0.96, respectively, and had a dimensional variation reducing effect.
【００２１】Ｋ2 Ｏについては、本発明例Ｄ１、Ｄ２で
は寸法比は両方とも０．９７以上で非常に良好な寸法精
度が得られた。Regarding K 2 O, in the invention examples D1 and D2, the dimensional ratio was 0.97 or more, and very good dimensional accuracy was obtained.
【００２２】[0022]
【発明の効果】本発明により、押出製品のトップとボト
ムとの間の寸法変動が大きいステンレス鋼や超合金の歩
留りを大幅に改善出来る。従って、ユーザーの要望に応
えうる形鋼の形状範囲も拡がる。Industrial Applicability According to the present invention, the yield of stainless steel or superalloy having large dimensional variation between the top and bottom of extruded products can be greatly improved. Therefore, the shape range of the shaped steel that can meet the user's request is expanded.
【図１】従来のガラス潤滑剤と本発明のガラス潤滑剤と
による押出製品ウエブ部のトップおよびボトム位置の肉
厚分布を示す図である。FIG. 1 is a diagram showing a thickness distribution at the top and bottom positions of a web portion of an extruded product using a conventional glass lubricant and the glass lubricant of the present invention.
【図２】従来のガラス潤滑剤による押出製品のトップお
よびボトムの断面形状を示す図である。FIG. 2 is a view showing a cross-sectional shape of a top and a bottom of an extruded product using a conventional glass lubricant.
【図３】実施例に用いた孔型形状を示す図である。FIG. 3 is a diagram showing a hole shape used in Examples.
１ 押出製品 ２ 孔型 1 Extruded product 2 Hole type
Claims (1)
％、Ａｌ2 Ｏ3 ：３〜１０％、Ｋ2 Ｏ：１０〜３０％、
残部がＳｉＯ2 および不可避的混入物から成ることを特
徴とする熱間押出加工用ガラス潤滑剤。1. CaO: 10 to 25, in weight percent.
%, Al 2 O 3 : 3 to 10%, K 2 O: 10 to 30%,
A glass lubricant for hot extrusion, wherein the balance comprises SiO 2 and unavoidable contaminants.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6123273A JPH07303915A (en) | 1994-05-13 | 1994-05-13 | Glass lubricant for hot extrusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6123273A JPH07303915A (en) | 1994-05-13 | 1994-05-13 | Glass lubricant for hot extrusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07303915A true JPH07303915A (en) | 1995-11-21 |
Family
ID=14856488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6123273A Withdrawn JPH07303915A (en) | 1994-05-13 | 1994-05-13 | Glass lubricant for hot extrusion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07303915A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227997A (en) * | 2009-03-30 | 2010-10-14 | Sumitomo Metal Ind Ltd | Glass lubricant for making tube by hot extrusion of metallic material and method of making tube by hot extrusion using the same |
| JP2010234375A (en) * | 2009-03-30 | 2010-10-21 | Sumitomo Metal Ind Ltd | Method of removing glass lubricant on inner surface of container for hot extrusion |
-
1994
- 1994-05-13 JP JP6123273A patent/JPH07303915A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010227997A (en) * | 2009-03-30 | 2010-10-14 | Sumitomo Metal Ind Ltd | Glass lubricant for making tube by hot extrusion of metallic material and method of making tube by hot extrusion using the same |
| JP2010234375A (en) * | 2009-03-30 | 2010-10-21 | Sumitomo Metal Ind Ltd | Method of removing glass lubricant on inner surface of container for hot extrusion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010731 |