DEP0042809DA - Steel nail, especially as a connecting element for highly stressed wooden structures - Google Patents
Steel nail, especially as a connecting element for highly stressed wooden structuresInfo
- Publication number
- DEP0042809DA DEP0042809DA DEP0042809DA DE P0042809D A DEP0042809D A DE P0042809DA DE P0042809D A DEP0042809D A DE P0042809DA
- Authority
- DE
- Germany
- Prior art keywords
- exp
- connecting element
- wooden structures
- highly stressed
- steel nail
- 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 title claims description 7
- 239000010959 steel Substances 0.000 title claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 238000005496 tempering Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 230000000171 quenching effect Effects 0.000 claims description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
Die übliche Herstellung von Nägeln erfolgt in einer Weise, dass halbhart gezogener oder kaltgewalzter Draht aus Stählen mit etwa 0,10 bis 0,35% Kohlenstoff in Schlagmaschinen verformt wird, wodurch die Nägel eine Zugfestigkeit erhalten, die je nach den gewählten Bedingungen zwischen etwa 50 und etwa 75 kg/mm(exp)2 liegt.The usual production of nails takes place in such a way that semi-hard drawn or cold-rolled wire made of steels with about 0.10 to 0.35% carbon is deformed in impact machines, giving the nails a tensile strength that, depending on the conditions chosen, between about 50 and about 75 kg / mm (exp) 2.
Die vorliegende Erfindung bezweckt Holzkonstruktionen hoher Belastbarkeit zu ermöglichen, bei denen die verwendeten Nägel ein wesentliches Element für die Beanspruchbarkeit darstellen. Demzufolge werden erfindungsgemäß Nägel in Verschlag gebracht, deren Zugfestigkeit mindestens 80 kg/mm(exp)2, vorzugsweise über 100 kg/mm(exp)2 beträgt. Es bereitet auch keine Schwierigkeiten, in den üblichen Schlagmaschinen Nägel herzustellen, deren Zugfestigkeit im Verwendungszustand zwischen 120 bis 160 kg/mm(exp)2 liegt. Um diese Ziele zu erreichen, werden Stahldrähte in geglühtem oder, falls erwünscht, halbhart gezogenem Zustand in üblicher Weise in der Schlagmaschine geschlagen und darauf vergütet. Durch geeignete Auswahl der Kohlenstoffgehalte (bis etwa 0,35%) und der Vergütungsbedingungen werden die jeweils geforderten Zugfestigkeits- und Dehnungswerte unschwer erreicht. Bei Verwendung von Stahldraht mit einem Kohlenstoffgehalt von 0,15-0,25% ist es auch möglich, die gewünschte hohe Festigkeit durch alleiniges Abschrecken in Wasser oder Öl ohne nachträgliches Anlassen zu erzielen. Aus wirtschaftlichen Gründen kommen vorwiegend unlegierte Kohlenstoffstähle in Betracht.The aim of the present invention is to enable wooden structures with a high load-bearing capacity, in which the nails used represent an essential element for the load-bearing capacity. Accordingly, according to the invention, nails whose tensile strength is at least 80 kg / mm (exp) 2, preferably more than 100 kg / mm (exp) 2, are locked. It is also not difficult to produce nails in conventional impact machines, the tensile strength of which in the state of use is between 120 and 160 kg / mm (exp) 2. In order to achieve these goals, steel wires in the annealed or, if desired, semi-hard drawn state are beaten in the usual manner in the beating machine and tempered thereon. The required tensile strength and elongation values can easily be achieved through a suitable selection of the carbon content (up to about 0.35%) and the tempering conditions. When using steel wire with a carbon content of 0.15-0.25%, it is also possible to achieve the desired high strength simply by quenching in water or oil without subsequent tempering. For economic reasons, mainly unalloyed carbon steels are used.
Claims (2)
Family
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