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Intermediate piece for connecting manganese steel molded bodies with carbon steel and method for connecting manganese high-carbon steel cast parts to control rails

A technology of forming body and plug-in, applied in welding medium, furnace type, welding equipment, etc., can solve problems such as fatigue strength, bending fracture strength, dent and other problems that cannot be completely solved

Inactive Publication Date: 2015-08-12
奥钢联软件系统有限责任公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the aid of this type of steel and other steels proposed so far for inserts, although the problems inherent in the direct welding of these two steels are largely avoided, the fatigue strength (Dauerfestigkeit) and the bending fracture strength with respect to the overall welded joint have not been fully resolved therein. (Biegebruchfestigkeit), because austenitic components and especially the material of the center and inserts can only reach 500 to 600 N / mm 2 of the maximum tensile strength, which thus leads to dents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] First welded with standard rails, then welded with high manganese steel castings. In principle, it is possible to cool the selected inserts by means of compressed air during the welding process without the heat of the welding, both in the first welding process and in the second welding process. In order to achieve the required strength values ​​and especially to reduce the fatigue strength from about 140N / mm 2 increased to about 190N / mm 2 , can advantageously be run in such a way that the insert is solution annealed at 900°C to 1100°C before welding, then quenched with water and further with air, wherein advantageously the welded joint with the standard rail is cooled at 200°C to 1100°C Annealed (glühen) at 600°C for tempering (Anlassen). It may also be advantageous to anneal the welded joint to the manganese steel casting after cooling at 200° C. to 600° C. for tempering. In such a mode of operation, the length of the insert can be, for example, about 50mm, wherein ...

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Abstract

In an intermediate piece for connecting molded articles of manganese steel with carbon steel, in particular austenitic manganese steel casting frogs with standard rails, the intermediate piece is comprised of steel from the group of austenitic-ferritic duplex steels having a ferrite portion of <60 wt %. The method for connecting austenitic manganese steel castings with standard rails is characterized in that an austenitic-ferritic intermediate piece made of duplex steel comprising <60% ferrite is welded with the manganese steel casting and the standard rail.

Description

[0001] This application is a divisional application of the invention patent application with the application number 200880109787.8 (PCT / AT2008 / 000338) and the application date of September 22, 2008. technical field [0002] The invention relates to inserts (Zwischenstück) for connecting manganese steel molded bodies and carbon steel, in particular to inserts for connecting high manganese steel fork castings (Manganhartstahlgussherzstück) to standard rails (Regelschienen), and to inserts for connecting high manganese Methods for steel castings and standard rails. Background technique [0003] High manganese steel cannot be directly welded to standard rail steel because of the relatively high temperatures required for welding. Austenitic manganese steel castings have the property of being strongly embrittled in the structure when heated to more than 300° C. due to carbide precipitation, whereby this embrittled structure is retained after slow cooling. Heating to high tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/00C21D6/00C21D9/04C22C38/00C22C38/44
CPCC21D2211/001C21D6/004C22C38/001B23K35/004C21D9/04C21D2211/005C22C38/44
Inventor J.布卢莫尔
Owner 奥钢联软件系统有限责任公司