Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for measuring temperature field in sintering furnace

A sintering temperature and sintering furnace technology is applied in the field of measuring the temperature field in the sintering furnace during the sintering process of cemented carbide. Effect

Active Publication Date: 2010-12-22
ZHUZHOU KINGTAL CEMENTED CARBIDE
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former is to distribute thermocouples at different positions in the furnace to obtain the temperature values ​​of their corresponding parts. However, due to the limitation of the high temperature resistance of the thermocouple material, it can only be adapted to the temperature measurement of less than 1000 ° C, while the cemented carbide sintering temperature is generally at At about 1400°C, the thermocouple method cannot be applied; the temperature measuring ring method measures the furnace temperature according to the size change of the ceramic ring at different sintering temperatures. Due to the limited sensitivity of the size change of the ceramic ring and the influence of other factors such as the atmosphere in the furnace, low measurement accuracy

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A method for testing the temperature distribution in a vacuum furnace or pressure furnace for cemented carbide sintering. It is used to measure the temperature distribution of a cemented carbide vacuum sintering furnace and a dewaxing and sintering integrated furnace. The measurement steps are:

[0017] Step A: making a standard cemented carbide test block, taking a cemented carbide mixture whose composition is WC-6%Co, and pressing it into 100 cemented carbide test blocks according to a conventional method;

[0018] Step B: Place the standard cemented carbide test block obtained in step A at a fixed position in a calibrated vacuum sintering furnace for sintering. The sintering temperatures are set to 1410°C, 1430°C, 1450°C, and 1480°C respectively. , place 5 pieces of standard cemented carbide test blocks at each sintering temperature, detect the coercive force data of the standard cemented carbide test blocks at each temperature after sintering, and take the average va...

Embodiment 2

[0021] A method for testing the temperature distribution in a vacuum furnace or a pressure furnace for cemented carbide sintering, it is used to measure the temperature distribution in a dewaxing and sintering integrated furnace, its measurement steps A and B are the same as in Example 1, and its step C yes:

[0022] According to the need to select the temperature measurement points in the dewaxing and sintering integrated furnace with a size of 900mm (length) × 600mm (width) × 500mm (height) to be tested, take several cemented carbide test blocks prepared in step A and place them in the The different positions in the sintering furnace to be tested are distributed as follows: respectively numbered T1, M2, T3, B4, M5, and B6 (where T, M, and B respectively indicate the height of the boat where the test block is placed from the bottom of the furnace), Carbide vacuum sintering furnaces and dewaxing and sintering integrated furnaces can place 6 layers of boats loaded with products...

Embodiment 3

[0024] Using the present invention to test a newly purchased pressure sintering furnace with a hearth size of 1200mm (length) × 600mm (width) × 500mm (height), determine the temperature distribution in the furnace, and evaluate whether the temperature distribution of the pressure sintering furnace is qualified , According to the acceptance terms of the contract, the temperature deviation in the furnace is allowed to be ±10°C under the sintering temperature. Its measurement steps A and B are the same as embodiment 1, and its step C is:

[0025] According to the need to select the temperature measurement points in the pressure sintering furnace to be tested, take 8 cemented carbide test blocks prepared in step A and place them in different positions in the sintering furnace to be tested. The distribution method is: respectively numbered T1, BM2, TM3, B4, B5, TM6, BM7, T8 (where T, M, and B respectively indicate the height from the bottom of the furnace in the furnace), the place...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for measuring a temperature field in a sintering furnace. In the method, based on the correspondence between the magnetic coercivity of a hard alloy test block and a sintering temperature, the temperature distribution of all parts in the furnace is reflected indirectly by testing the size of the magnetic coercivity of a test block sintered in the furnace so as to provide a basis for making a sintering process and overhauling equipment. The method is simple and easy to implement; and the test block, which is made of a hard alloy material, is the same as the product processed by the sintering furnace in terms of material. Compared with the ceramic ring in the prior art, the test block has performance indexes which are highly instructive for a hard alloy sintering process and has the advantages of visualness and accuracy.

Description

technical field [0001] The invention relates to a production process control method of cemented carbide, in particular to a method for measuring the temperature field in a sintering furnace during the sintering process of cemented carbide. Background technique [0002] In the production of cemented carbide such as sintering, the temperature in the sintering furnace has an important influence on the performance of the cemented carbide, and should be strictly controlled during the production process. However, due to equipment structure factors, the temperature of various parts in the sintering furnace is difficult to reach Uniform and consistent, and at the same time, due to the aging of equipment and other reasons, the temperature distribution in the furnace will also change during use. Therefore, it is necessary to understand the distribution of the temperature in the sintering furnace and to track and measure its changes. The temperature distribution, that is, the temperatu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01K7/38
Inventor 蔡球吴建国张国顺
Owner ZHUZHOU KINGTAL CEMENTED CARBIDE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com