Production method of pre-hardened high-speed steel products and production device thereof

Abstract

The invention discloses a production method of pre-hardened high-speed steel products and a production device thereof. The method is characterized by taking high-speed steel wires as raw materials and comprises the following steps: pre-straightening the raw materials, carrying out quench heating on the pre-straightened raw materials, carrying out small deformation on the high-speed steel wires bya wire-drawing die after quenching, quenching, straightening, tempering in a tempering furnace, straightening, tempering, straightening and cooling, and carrying out cutting-to-length on the productsformed by traction by a tractor. The invention is characterized by combining quenching, tempering and straightening to carry out continuous production, realizing online production of the pre-hardenedhigh-speed steel wires, ensuring identical product organizations and properties, ensuring reliable and stable quality and producing various steel wires with length being more than 2m and with good straightness.

Description

Technical field [0001] The invention belongs to the technical field of special steel processing methods and equipment, and in particular relates to a high-speed steel pre-hardened material production method and a production device thereof. Background technique [0002] At present, the production of high-speed steel pre-hard materials uses high-speed steel coils for straightening and cutting (the length is generally 2m), and then the straightening strips are cut according to the production requirements. The longest length of each is not more than 400mm. Put it in a salt bath furnace for heating, rubbing with a washboard, and pressing and quenching. The quenched steel wire is bundled into bundles, and then multiple bundles are stacked in a basket for tempering. Due to the large amount of furnace installed in the tempering furnace, the heating time and heating temperature of each workpiece are inconsistent, which makes the performance unstable. At the same time, there are many workp...

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Problems solved by technology

[0003] The production of high-speed steel pre-hardened material is generally heated by ordinary salt bath furnace. The disadvantage is that it is difficult to control the temperature, and the workpiece is easy to overheat or burn. When heating, the workpiece cannot be absolutely perpendicular to the liquid surface, causing the workpiece to form a wavy bend. Washboard type, for workpieces with a diameter less than or equal to 4mm, because the workpiece is not easy to roll, the straightening effect of the workpiece is very poor. If it is larger than 500mm, the longer the straightening effect is, the worse the straightening effect will be. Manual straightening must be used to cooperate. Many "wave bends" are formed during manual straightening. The degree of fire is inconsistent, resulting in uneven performance of the workpiece

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