Heating processing technology for wear-resistant cutting board

A knife plate and process technology, applied in the field of heat treatment process of wear-resistant knife plate, can solve the problems of low production efficiency, energy waste, etc., and achieve the effects of improving production efficiency, saving energy consumption, and high strength

Active Publication Date: 2009-11-04
LIUZHOU JINMAO MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a heat treatment process for wear-resistant blades to

Method used

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  • Heating processing technology for wear-resistant cutting board
  • Heating processing technology for wear-resistant cutting board
  • Heating processing technology for wear-resistant cutting board

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0035] Embodiment one:

[0036] A heat treatment process for a wear-resistant knife plate with a thickness of 40mm. The process is to preheat and heat the formed wear-resistant knife plate workpiece, and then undergo high-strength quenching and tempering in sequence. The main steps are as follows:

[0037] A. Preheating: Transport the formed wear-resistant knife plate workpiece to the preheating zone of the heating system for preheating. The preheating temperature is 550°C, and the preheating time is 1.125min / mm, which is 45 minutes;

[0038] B. High-temperature heating: Send the preheated wear-resistant knife plate workpiece to the high-temperature zone of the heating system for high-temperature heating, the temperature is 890 ° C, and keep warm for 1.125min / mm, that is, 45 minutes, and at the same time through nitrogen Add protective gas to the machine to catch nitrogen;

[0039] C. High-strength quenching: The heated wear-resistant knife plate workpiece is transported to a...

Example Embodiment

[0047] Embodiment two:

[0048] A heat treatment process for a wear-resistant knife plate with a thickness of 35mm. The main steps of the process and the high-pressure cooling water and high-strength quenching nozzles used are the same as those in Example 1, except that the process parameters in the main steps are different. The main steps of sharpening the board are as follows:

[0049] A. Preheating: Transport the formed wear-resistant knife plate workpiece to the preheating zone of the heating system for preheating. The preheating temperature is 500°C, and the preheating time is 1.086min / mm, which is 38 minutes;

[0050] B. High-temperature heating: send the preheated wear-resistant knife plate workpiece to the high-temperature zone of the heating system for high-temperature heating, the temperature is 880 ° C, and keep warm for 1.086min / mm, that is, 38 minutes, and at the same time through nitrogen Add protective gas to the machine to catch nitrogen;

[0051] C. High-str...

Example Embodiment

[0053] Embodiment three:

[0054] A heat treatment process for a wear-resistant knife plate with a thickness of 30mm. The main steps of the process and the high-pressure cooling water and high-strength quenching nozzles used are the same as those in Example 1, except that the process parameters in the main steps are different. The main steps of sharpening the board are as follows:

[0055] A. Preheating: Transport the formed wear-resistant knife plate workpiece to the preheating zone of the heating system for preheating. The preheating temperature is 450°C, and the preheating time is 1min / mm, which is 30 minutes;

[0056] B. High-temperature heating: Send the preheated wear-resistant knife plate workpiece to the high-temperature zone of the heating system for high-temperature heating, the temperature is 870 ° C, and keep it warm for 1 min / mm, that is, 30 minutes, and pass through the nitrogen generator at the same time Add protective gas to catch nitrogen;

[0057] C. High-s...

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Abstract

The invention relates to a heating processing technology of a wear-resistant cutting board, in which a shaped wear-resistant cutting board workpiece is preheated, heated under high temperature, and then is subjected to high-strength quenching and tempering. The technology comprises the following steps: A. preheating: the preheating temperature is 450-550 DEG C, and the preheating time is 0.5-1.125min/mm; B. high temperature heating: the temperature is 870-890 DEG C, and the holding time is 0.5-1.125min/mm; C. high-strength quenching: whole spray water time of high-strength quenching is 70-700 seconds, and time in intensified spray is 15-20 seconds; D. tempering: low temperature tempering is carried out, followed by air cooling to room temperature; high pressure cooling water used in the invention is recyclable. The invention has the advantages of making full use of reasonable heating processing technology under the premise of ensuring fine property of the wear-resistant cutting board, improving production efficiency and saving energy consumption, thus lowering production cost of the wear-resistant cutting board.

Description

Technical field: [0001] The invention relates to a heat treatment process, in particular to a heat treatment process for wear-resistant blades of engineering machinery and mining machinery. Background technique: [0002] At present, wear-resistant blades used in engineering machinery, mining machinery, etc. generally require high strength, sufficient toughness, and wear resistance, and heat treatment is an effective method to improve mechanical properties such as strength, toughness, and wear resistance. , under normal circumstances, the hardness of the wear-resistant knife plate after heat treatment should meet the requirements in Schedule VII. And in the heat treatment process of existing wear-resistant knife plate, ubiquitous energy waste is bigger, the phenomenon that production efficiency is lower, as publication number is: the Chinese patent application of CN 1544682A " material, heat treatment of integral type wear-resistant shovel blade of loader and Welding Process...

Claims

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Application Information

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IPC IPC(8): C21D9/00C21D1/18C21D1/34C21D1/74C21D1/60
Inventor 何拥军周永红何兴保李海平何瑞珍陆君雄
Owner LIUZHOU JINMAO MACHINERY
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