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Manufacturing method for enhancing austenite conversion rate

A manufacturing method and conversion rate technology, applied in the manufacturing field of improving austenite conversion rate, to achieve the effect of reducing phase transformation stress, small internal stress, good wear resistance and thermohardness

Inactive Publication Date: 2014-10-29
CHENGDU XINGBODA PRECISION MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

How to further optimize the manufacturing method that is beneficial to improving the austenite conversion rate in the prior art is the key issue to further improve the quality of the turning tool. The invention provides a manufacturing method that is beneficial to improving the austenite conversion rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A manufacturing method conducive to improving the austenite conversion rate, comprising sequential blank blanking, forging, cutting, heat treatment and grinding, the blank is W2MoCr4V2Co8 high-speed tool steel, and the heat treatment includes sequential preheating, heating Heat preservation, quenching and tempering, the quenching is oil cooling, an annealing step is also included between the forging and cutting, and the annealing step is to heat the forged blank step by step: heating from normal temperature to 600-650°C Insulate for not less than 10 minutes, continue heating to 850-860°C for not less than 20 minutes, and then cool slowly. The heating rate of the above heating is not greater than 25°C / h. The tempering process also includes a cold treatment step. The cold treatment step and The tempering process also includes pretreatment before cold treatment, and the subsequent cold treatment also includes water bath tempering. The cold treatment is to carry out the liqu...

Embodiment 2

[0019] This embodiment is further limited on the basis of Embodiment 1. In order to prevent the oil stains on the blank from affecting the heat treatment during the machining process and affect the final quality of the product, a cleaning step is also included between the cutting process and the heat treatment. The cleaning step includes a degreasing cleaning process and a drying process carried out in sequence.

[0020] Further, the quenching and tempering also include sequential degreasing and cleaning processes, drying processes and inspection processes. The set inspection process is to check the quenching quality of the blank, such as the appearance of cracks and thermal deformation, and the observation of the uniformity of quenching, so as to avoid the blanks that do not meet the quality requirements from entering the next step of processing and wasting processing resources.

[0021] In order to prevent the blank from being oxidized during the cooling process and prevent ...

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Abstract

The invention discloses a manufacturing method for enhancing austenite conversion rate, which sequentially comprises the steps of blank baiting, forging, cutting, heat treatment and grinding. The blank is W2MoCr4V2Co8 high-speed tool steel. The heat treatment sequentially comprises the steps of preheating, heating, holding, quenching and tempering, wherein the preheating is performed by staged gradual heating, and the quenching is oil cooling. Annealing is added between the forging and cutting. The annealing is performed by heating the forged blank by multiple steps. After the tempering step, pretreatment before cold treatment, cold treatment and water bath tempering are performed. The method has the advantages of simple process route and high austenite conversion rate. The obtained turning tool has the advantages of high hardness (up to higher than 72 HRC), favorable wear resistance and favorable thermohardening property.

Description

technical field [0001] The invention relates to the field of machining and manufacturing technology for lathe tools, in particular to a manufacturing method which is beneficial to improving the austenite transformation rate. Background technique [0002] In the machining industry the lathe is considered the working "mother machine" of all equipment. Lathes are mainly used to process shafts, discs, sleeves and other workpieces with rotating surfaces, mainly cylinders, and are the most widely used type of machine tools in machinery manufacturing and repair factories. Turning tools are used for turning and have a Cutting tool. Turning tool is one of the most widely used tools in cutting. [0003] With the development of modern manufacturing technology, high-speed steel turning tools are widely used in cutting. During use, the cutting part of the turning tool has to bear a lot of pressure, friction, impact and work at a higher temperature, which makes high-speed Steel turning...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/18C21D1/32C21D6/04
Inventor 吴光武
Owner CHENGDU XINGBODA PRECISION MACHINERY
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