DE933206C - Covering compound when hardening steel - Google Patents

Covering compound when hardening steel

Info

Publication number
DE933206C
DE933206C DED15137D DED0015137D DE933206C DE 933206 C DE933206 C DE 933206C DE D15137 D DED15137 D DE D15137D DE D0015137 D DED0015137 D DE D0015137D DE 933206 C DE933206 C DE 933206C
Authority
DE
Germany
Prior art keywords
hardening
covering compound
hardening steel
finely ground
mass
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
Application number
DED15137D
Other languages
German (de)
Inventor
Lorenz Mueller
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.)
WESTFAELISCHE CHAMOTTE IND CAR
Original Assignee
WESTFAELISCHE CHAMOTTE IND CAR
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 WESTFAELISCHE CHAMOTTE IND CAR filed Critical WESTFAELISCHE CHAMOTTE IND CAR
Priority to DED15137D priority Critical patent/DE933206C/en
Application granted granted Critical
Publication of DE933206C publication Critical patent/DE933206C/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/04—Treatment of selected surface areas, e.g. using masks

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Paints Or Removers (AREA)

Description

Abdeckmasse beim Härten von Stahl Beim Härten von Werkstücken aus Stahl, insbesondere auch beim Oberflächenhärten, ist oft die Aufgabe gestellt, Kanten, Ränder von Aussparungen od. ä. vor der Härtung zu schützen. Es tritt hierbei das Bestreben auf, diese weich _zu haltenden Stellen vor der Härtung mit einer schützenden Masse in entsprechender Dicke zu bestreichen, die sowohl die Werkstückteile gegen die Erhitzung bzw. gegen die nachfolgende schroffe Abschrekkung schützt. Die Verwendung der im Handel befindlichen feuerfesten Abdeckmassen, die für ähnliche Zwecke Verwendung finden, zeigte im betrieblichen Gebrauch keine befriedigenden Ergebnisse. Insbesondere beim Oberflächenhärten mittels Leuchtgas-Sauerstoff und nachfolgender Abschrekkung oder auch bei der Erhitzung von Werkstückoberflächen mittels elektrischer Heizvorrichtungen und anschließender Abschreckung der erhitzten Zonen traten folgende Nachteile auf. Die Oberfläche dieser Massen wird durch die Erhitzung glasartig spröde. Der Flammendruck oder= der Druck des Kühlwassers zerstört diese Aasur und spült unter Umständen die Schutzmasse ganz- oder teilweise fort. Es kommt auch vor, daß diese Massen nicht fest am Werkstück haften und sich von diesem während der Härtung abheben" Gegenstand vorliegender Erfindung ist eine Masse, die diese Nachteile vermeidet und bei der Härtung, insbesondere bei der Oberflächenhärtung, den abgedeckten Stellen sieher-Schtz bietet. Es hat sich überraschenderweise herausgestellt, daß eine Masse folgender Zusammensetzung den Anforderungen genügt: etwa 850/0 (Scheuerfelder) -Klebsand, feinst gemahlen, etwa 12% Pfälzerton, feinst gemahlen, etwa 30/0 Flußspat, feinst zerkleinert, alle Komponenten zusammen in einem Gegenstrommischer gemischt mit etwa io% Flüssigkeit, bestehend aus etwa 75% Wasser und etwa 25% Sulfitlauge.Covering compound when hardening steel When hardening workpieces Steel, especially when it comes to surface hardening, is often faced with the task of cutting edges, To protect the edges of recesses or the like from hardening. It occurs here that Endeavor to keep these soft _zu-hold areas before hardening with a protective To coat mass in an appropriate thickness, which both the workpiece parts against the heating or protects against the subsequent abrupt cut-off. The usage the commercially available refractory covering compounds that are used for similar purposes found, showed no satisfactory results in operational use. In particular during surface hardening by means of luminous gas oxygen and subsequent quenching or when heating workpiece surfaces by means of electrical heating devices and then quenching the heated zones, the following disadvantages occurred. The surface of these masses becomes glass-like brittle as a result of the heating. The flame pressure or = the pressure of the cooling water destroys this aasur and under certain circumstances rinses the Protective mass completely or partially away. It also happens that these masses fail adhere firmly to the workpiece and stand out from it during hardening "object The present invention is a mass that avoids these disadvantages and in the Hardening, especially when surface hardening, the covered areas sieher-Schtz offers. It has surprisingly been found that a The mass of the following composition meets the requirements: approx. 850/0 (scrubbing fields) -Glue sand, finely ground, about 12% Palatinate clay, finely ground, about 30/0 fluorspar, finely chopped, all components mixed together in a countercurrent mixer with about 10% liquid, consisting of about 75% water and about 25% sulphite liquor.

Diese Masse behält während der Härtung genügend Zähigkeit, versprödet also nicht und haftet fest an den Werkstücken. Sie bietet weiter den bestrichenen Stellen genügend Schutz gegen die mit der Härtung verbundenen Erwärmungen und Abkühlungen.This mass retains sufficient toughness during hardening and becomes brittle so not and adheres firmly to the workpieces. She continues to offer the coated one Provide sufficient protection against the heating and cooling associated with hardening.

Es sei noch erwähnt, daß diese Masse auch für ähnliche wie die oben erwähnten Zwecke Verwendung finden kann, z. B. als Schutzmasse beim Zementieren.It should also be mentioned that this mass is also suitable for similar to the above mentioned purposes can be used, z. B. as a protective mass when cementing.

Claims (1)

PATENTANSPRUCH: Abdeckmasse, die Teile von Werkstücken beim Härten oder Oberflächenhärten gegen Erwärmung, Abkühlung und Härtung schützen soll, dadurch gekennzeichnet, daß ihre Zusammensetzung aus etwa 85 0lo Klebsand, feinst gemahlen, etwa i2% Pfälzerton, feinst gemahlen, etwa 3% Flußspat, feinst zerkleinert, besteht und alle Komponenten zusammen mit etwa io% Flüssigkeit gemischt werden, die aus etwa 750/0 Wasser und etwa 250/0 Sulfitlauge besteht, so daß eine homogene Mischung erzielt wird. PATENT CLAIM: Covering compound intended to protect parts of workpieces during hardening or surface hardening against heating, cooling and hardening, characterized in that its composition consists of about 85 0lo adhesive sand, finely ground, about i2% Palatinate clay, finely ground, about 3% fluorspar, finest crushed, consists and all components are mixed together with about 10% liquid, which consists of about 750/0 water and about 250/0 sulphite liquor, so that a homogeneous mixture is achieved.
DED15137D 1941-05-27 1941-05-27 Covering compound when hardening steel Expired DE933206C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DED15137D DE933206C (en) 1941-05-27 1941-05-27 Covering compound when hardening steel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED15137D DE933206C (en) 1941-05-27 1941-05-27 Covering compound when hardening steel

Publications (1)

Publication Number Publication Date
DE933206C true DE933206C (en) 1955-09-22

Family

ID=7034956

Family Applications (1)

Application Number Title Priority Date Filing Date
DED15137D Expired DE933206C (en) 1941-05-27 1941-05-27 Covering compound when hardening steel

Country Status (1)

Country Link
DE (1) DE933206C (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758673B1 (en) * 1968-07-18 1971-07-15 Peddinghaus Paul Ferd Fa DEVICE FOR CONTINUOUS SURFACE HARDENING OF WORKPIECES
DE3427837A1 (en) * 1984-07-27 1986-02-06 Ford-Werke AG, 5000 Köln Process for producing joined weldments
DE3628264A1 (en) * 1986-08-20 1988-02-25 Man Nutzfahrzeuge Gmbh Process for the manufacture of components from steel of high strength with at the same time high toughness, which retain these properties even after hot-forming
US6431068B1 (en) 1999-09-14 2002-08-13 Komori Corporation Plate exchanging apparatus in rotary printing press

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1758673B1 (en) * 1968-07-18 1971-07-15 Peddinghaus Paul Ferd Fa DEVICE FOR CONTINUOUS SURFACE HARDENING OF WORKPIECES
DE3427837A1 (en) * 1984-07-27 1986-02-06 Ford-Werke AG, 5000 Köln Process for producing joined weldments
DE3628264A1 (en) * 1986-08-20 1988-02-25 Man Nutzfahrzeuge Gmbh Process for the manufacture of components from steel of high strength with at the same time high toughness, which retain these properties even after hot-forming
US6431068B1 (en) 1999-09-14 2002-08-13 Komori Corporation Plate exchanging apparatus in rotary printing press

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