Endless metal ring and method of producing the same

a metal ring and end-less technology, applied in the field of end-less metal ring, can solve the problems of reducing the fatigue strength of endless metal ring, deteriorating the fatigue strength of titanium nitride, etc., and achieve the effect of reducing the constriction of welded parts and excellent fatigue strength

Inactive Publication Date: 2019-10-31
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides an improved way to make a strong metal ring that reduces its size without losing its effectiveness over time. This makes it more durable for use in various applications such as automobiles or machinery.

Problems solved by technology

This patent discusses how strong and durable materials can be made from metals called cobalt chrome alloys. These materials are commonly used in manufacturing parts used in vehicles. However, they also require certain qualities such as strength, wear-resistance, and corrosion resistance. To achieve these properties, specialized processing techniques must be applied to create the desired material.

Method used

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  • Endless metal ring and method of producing the same
  • Endless metal ring and method of producing the same
  • Endless metal ring and method of producing the same

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Production of Endless Metal Ring

[0037]An endless metal ring was produced using a maraging steel plate including 5.75 mass % to 6.05 mass % of molybdenum, 12.0 mass % to 17.0 mass % of cobalt, 17.0 mass % to 20.0 mass % of nickel, 0.4 mass % to 0.5 mass % of titanium, and 0 mass % to 0.15 mass % of aluminum with the remainder being made up of iron and inevitable impurities according to the production method described above. In the annealing process, a flow rate of nitrogen gas through a water supply source was controlled, and annealing was performed at 880° C. for 15 minutes while a dew point temperature was adjusted to −20° C. The thickness of the titanium nitride layer in the obtained endless metal ring was 2 μm.

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Abstract

A method of producing an endless metal ring includes welding ends of a maraging steel plate such that the maraging steel plate has a ring shape, annealing the maraging steel plate with the ring shape in a furnace at 845° C. or higher, and nitriding the annealed maraging steel plate, wherein, during the annealing, a dew point temperature indicating an amount of water in the furnace is adjusted such that a value of the dew point temperature [° C.] is equal to or higher than a value obtained by subtracting 35 from time [min] at an annealing temperature of 845° C. or higher.

Description

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Claims

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Application Information

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Owner TOYOTA JIDOSHA KK
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