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Salt bath tuff-triding treatment for high speed steel (W6Mo5Cr4V2) slide vane (or vane)

A high-speed steel, soft nitriding technology, applied in coating, metal material coating process, solid-state diffusion coating, etc., can solve the problem that the wear resistance and service life of the compressor vane cannot meet the design requirements of the whole machine.

Active Publication Date: 2005-05-18
浙江百达精工股份有限公司
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

However, with the requirements of environmental protection (mandatory use of fluorine-free refrigerants), frequency conversion energy-saving technology and large-scale use of high-power air conditioners, the wear resistance and service life of compressor vanes (or blades) that have not been strengthened by surface treatment can no longer be used. Meet the design requirements of the whole machine

Method used

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Experimental program
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Effect test

Embodiment Construction

[0005] Prepare 100 kg of nitrocarburizing salt bath solution: take 55 kg of NaCNO, 10 kg of KCNO, Li 2 CO 3 8 kg, K 2 CO 3 27 kilograms, utilize nitrocarburizing treatment salt bath to the high-speed steel (W6Mo5Cr4V2) sliding piece (or blade) treatment method, it is characterized in that it is made up of following steps: Cleaning: use aviation kerosene or alcohol to wash away surface oil and dirt. Loading: Choose different sizes of steel wire mesh according to different specifications of slides, place the slides vertically, and strictly prohibit laying them flat. Preheating: Preheating temperature 350-420°C for 10-20 minutes according to different specifications and different processing volumes each time , Treatment: The treatment temperature is 550°C-590°C, and the time is 15-60 minutes. Ammonia gas (flow rate: 0.6-1.2 liters / min. 800-1200 kg salt bath) or compressed air (flow rate: 0.6-1.2 liters / min. 800-1200 kg salt bath) is fed during treatment, oil cooling: the cool...

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Abstract

The present invention relates to the salt bath tufftriding treatment of high speed steel slide vane or blade. The tufftriding treating liquid consists of: NaCNO 40-60 wt%, KCNO 5-15 wt%, Li2CO3 3-10 wt% and K2CO3 25-40 wt%. The salt bath tufftriding treatment of the high speed steel slide vane or blade with the tufftriding treating liquid includes the following steps: cleaning with aviation kerosene or alcohol; mounting vertically on proper steel wire net; pre-heating at 350-420 deg.c for 10-20 min; treating at 550-590 deeg.c for 15-60 min while introducing ammonia or compressed air; 100-160 deg.c hot oil cooling for 30-120 sec; water washing and cleaning for 5-10 min; eliminating oil via soaking in water containing detergent for 2-5 min and soaking in water for 1-2 min for cleaning; and polishing in a vibrating polishing machine for 40-80 min. The present invention can raise the antiwear performance and prolong the service life of slide vane or blade of compressor.

Description

technical field [0001] The invention relates to a salt bath treatment, in particular to a salt bath nitrocarburization treatment of a high-speed steel (W6Mo5Cr4V2) slide (or blade). Background technique [0002] At present, the most important wear-resistant moving part of the air-conditioning compressor is the air-conditioning compressor sliding vane (or vane). The traditional compressor (fluorine-containing refrigerant, non-frequency conversion, low power) sliding vane does not need surface treatment, and its resistance The abrasiveness and service life can meet the design requirements. However, with the requirements of environmental protection (mandatory use of fluorine-free refrigerants), frequency conversion energy-saving technology and large-scale use of high-power air conditioners, the wear resistance and service life of compressor slides (or blades) that have not been strengthened by surface treatment can no longer be used. Meet the design requirements of the whole m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/50
Inventor 魏成刚许文阮吉林
Owner 浙江百达精工股份有限公司
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