Manufacture method of installed and welded shearing tool of heavy forging

Abstract

The invention relates to a manufacture method of an installed and welded shearing tool of a heavy forging, which is characterized by sequentially comprising the steps of: selecting materials, designing, processing parts, welding and thermally treating to obtain the installed and welded shearing tool of the heavy forging. A blade part (1) of the installed and welded shearing tool is made of a high-speed tool steel material with good high-temperature creep resistance, a support base body (2) is made of a common heat-resistant alloy steel material, the blade part and the support base body are subjected to shape and size design and milling machining, are welded by adopting a high-energy electronic beam and then subjected to high-temperature tempering thermal treatment to obtain the installed and welded shearing tool. The installed and welded shearing tool manufactured in the invention ensures that the blade has good high-temperature wear resistance, high-temperature plastic deformation resistance capability and high shearing quality for the heavy forging, has the advantages of manufacture material saving, low manufacture cost and long service life, can meet requirements for wear repairing and performance restoring after the blade is used for a long time, and replaces a traditional shearing tool for the heavy forging, made of the single material.

Description

Technical field [0001] The invention relates to a method for manufacturing a forging tool, in particular to a method for manufacturing a group welding cutting tool for large forgings. Background technique [0002] The existing large forging shearing tools are generally forged from a single material such as heat-resistant alloy steel. Large-scale forging cutting tools forged from this single material are subject to high-temperature wear and high-temperature plastic deformation during the cutting process of high-temperature forgings, and the cutting edge is easy to thicken, become blunt, or even curl, resulting in poor shearing quality of the cutting edge , The waste of material that needs to be removed for forgings increases. The use of integral high-speed tool steel for forging shearing tools has very low material utilization and high cost, which cannot enter the practical stage; the method of mechanically connecting high-speed tool steel and heat-resistant alloy steel requires ...

AI Technical Summary

Problems solved by technology

The large-scale forging shearing tool forged from this single material is subject to high-temperature wear and high-temperature plastic deformation during the high-temperature forging shearing process, and the shearing blade is prone to thickening, dulling, and even curling, resulting in poor shearing quality of the shearing edge , the waste of material that needs to be removed from forgings increases

The overall high-speed tool steel forging shearing tool is used, the material utilization rate is very low, the cost is extremely high, and it cannot enter the practical stage; the method of mechanically connecting high-speed tool steel and heat-resistant alloy steel needs to be configured with a larger size of high-speed tool steel and complex connection mechanism, and the utilization rate of high-speed tool steel is very low, and the cost is very high, especially as a large-scale forging shearing tool, its connection reliability is very poor, and it cannot be practically applied; Conventional arc welding methods such as arc welding weld high-speed tool steel and heat-resistant alloy steel. The weld strength is low, the welding heat-affected zone is large, the welding deformation is large, and welding cracks are prone to occur. The overall quality of the weld cannot meet the requirements of shearing tools. It cannot be practically applied; if the high-energy laser beam is used to weld high-speed tool steel and heat-resistant alloy steel, it is only used for welding thin plate structures with a thickness of less than 10mm, and the thickness δ of the forging cutting tool is generally greater than 10mm, and the high-energy laser beam cannot adapt to this type of welding. Welding requirements for cutting tools; Diffusion welding method can be used for the connection of high-speed tool steel and heat-resistant alloy steel, but the welding time of diffusion welding is too long and the welding efficiency is very low, which is not conducive to mass production of low-cost application cutting tool products, market users unacceptable

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