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The Valve Spool With Hardness of 65HRC Can Not Be Made in 30 Factories, But AAK Hydraulic Valve Has Already Achieved It

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Update time : 2021-08-25 16:12:40
Felix is the purchaser of a hydraulic valve company in Germany. Some time ago, he wanted to purchase a batch of hydraulic flow valves with valve spool hardness of 65HRC. He had consulted more than 30 manufacturers in a month (with great perseverance). Only two hydraulic valve manufacturers said that 58HRC is the limit, and the rest had no sound at all. Felix couldn't resist the pressure of customers urging goods every day and was ready to give up the order. His boss was unhappy after hearing it, so his pressure was even greater.
 
Felix accidentally saw an article about 65HRC valve spool of AAK hydraulic valve when browsing some B2B websites. Realizing that maybe AAK hydraulic valve could bring him good luck, Felix directly asked by email whether we could produce hydraulic flow valve with valve spool hardness above 65HCR. We replied that we need to know the working scene of your hydraulic flow valve and the drawings before we judged.
 
It is not the first time for AAK hydraulic valve to receive consultation on the hardness of valve spool. Some hydraulic valve manufacturers can not solve the problem of hardness because of the following reasons. First, without professional and systematic knowledge about material, how can they choose the most suitable alloy steel material? Most importantly, the heat treatment of materials is led by the processing factory, because the heat treatment is processed outside, and 20% of the factory changed the outsourcing processing place with one shot, thus, the hardness can not be guaranteed, let alone the stability.
 
Regarding the material for the valve spool, AAK hydraulic valve selects the most suitable steel according to the working scene of the hydraulic valve, the medium used, and the customer's hydraulic parameters, then combined them with the wear resistance, linear expansion coefficient and deformation of different steel. The High grade tool steel like Cr12MoV, 12CrNi3A, 18CrNiWA and GCr15 are our common materials, and the last and most important link in the hardness of the hydraulic flow valve spool is the heat treatment process of the steel. If the hardness needs to be above 65HRC, the carbon content of steel should be considered first, and then find a way in heat treatment. Steels with different contents have different heat treatment methods in quenching, carburizing and nitriding. Pretreatment, quenching, cold treatment, tempering, aging, fine processing and secondary aging, the aging temperature and holding time of these processes are the key. We can achieve the aging temperature of 420℃ and heat preservation of more than 10H, obtaining a hardness of 65HRC or above, which our peers can't think of or do.
 
We received the drawings of Felix's hydraulic flow valve. In the email, the product performance, operating conditions, product parameter, details are all mentioned and marked, especially the emphasis on the valve spool hardness of 65HRC. We had to admire the German's preciseness. According to these indicators of the hydraulic flow valve, the technical team of AAK hydraulic valve carefully simulated and replied to him by email that we could send the samples of the hydraulic flow valve within 12 days. Felix was happy but also worried, he once again emphasized various indicators of hydraulic flow valve, especially the hardness of valve spool 65HCR. We could understand his mood. After all, many hydraulic valve manufacturers couldn't meet this standard.
 
Two weeks after we sent the samples of hydraulic flow valves, Felix directly placed a small order of 200 hydraulic flow valves. He told us privately that his customers were very satisfied with the samples of these hydraulic flow valves, but they were a little worried about the stability of the mass production. We could understand his customer's trial order. After all, many hydraulic valve manufacturers couldn't meet this standard. We believe that large orders for hydraulic flow valves will be placed with AAK within 2 months after shipment.
 
If you also need 65HRC valve spool hardness index, please contact AAK hydraulic valve. Email: [email protected].

 
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