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Strengthening method for bearing land of aluminum profile extrusion hot working die

A technology of hot working molds and working belts, which is applied in the coating process and coating of metal materials, can solve the problems of low surface brightness of aluminum materials, high requirements of nitriding process, and low service life, etc., and achieves large stress concentration effect, High surface brightness, reducing the effect of mold change

Active Publication Date: 2020-03-17
芜湖点金机电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the current aluminum profile extrusion die needs multiple nitriding to meet the production requirements. The cycle is long and the cost is high; the nitriding process requires high requirements; Aluminum rod; and extruded aluminum with low gloss surface

Method used

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  • Strengthening method for bearing land of aluminum profile extrusion hot working die
  • Strengthening method for bearing land of aluminum profile extrusion hot working die
  • Strengthening method for bearing land of aluminum profile extrusion hot working die

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] It is illustrated by a plane-splitting combined mold. The strengthened working belt does not need nitriding treatment. The specific implementation steps are as follows:

[0048] The composition of the material for strengthening the working belt includes the following components in mass percentage: carbon C: 0.85%; cobalt Co: 3.5%; silicon Si: 0.45%; manganese Mn: 0.35%; chromium Cr: 3.85%; vanadium V: 1.95%; molybdenum Mo: 4.55%; tungsten W: 5.55%; sulfur S: ≤0.030%; phosphorus P: ≤0.030%; nickel Ni: ≤0.30%; copper Cu: ≤0.25%, the balance of iron.

[0049] The working belt of the mold is strengthened, and the strengthening process is as follows:

[0050] (1) Remove about 5mm of the working belt of the upper die as a whole ( figure 2 );

[0051] (2) There are two ways to process the working belt of the lower die:

[0052] A. The overall depth and width of the working belt of the lower die is removed by about 5mm ( image 3 );

[0053] B. Perform a 5×45° chamfer on ...

Embodiment 2

[0059] It is illustrated by a plane-splitting combined mold. The strengthened working belt does not need nitriding treatment. The specific implementation steps are as follows:

[0060] The composition of the material for strengthening the working belt includes the following components in mass percentage: carbon C: 0.8%; cobalt Co: 4.5%; silicon Si: 0.4%; manganese Mn: 0.45%; chromium Cr: 4.4%; vanadium V: 2.35%; molybdenum Mo: 5.5%; tungsten W: 6.5%; sulfur S: ≤0.030%; phosphorus P: ≤0.030%; nickel Ni: ≤0.30%; copper Cu: ≤0.25%, the balance of iron.

[0061] The working belt of the mold is strengthened, and the strengthening process is as follows:

[0062] (1) Remove about 5mm of the working belt of the upper die as a whole ( figure 2 );

[0063] (2) There are two ways to process the working belt of the lower die:

[0064] A. The overall depth and width of the working belt of the lower die is removed by about 5mm ( image 3 );

[0065] B. Perform a 5×45° chamfer on the u...

Embodiment 3

[0071] Same as Example 1, the only difference is that the composition of the material for strengthening the working belt includes the following components in mass percentage: carbon C: 0.9%; cobalt Co: 2.5%; silicon Si: 0.55%; manganese Mn: 0.35%; Chromium Cr: 3.8%; Vanadium V: 1.95%; Molybdenum Mo: 4.5%; Tungsten W: 5.5%; Sulfur S: ≤0.030%; Phosphorus P: ≤0.030%; Nickel Ni: ≤0.30%; %, the remaining iron; chamfering the upper surface of the upper and lower die working belts by 5×45° respectively to obtain a strengthened groove; the method of forming a strengthened working belt is surfacing welding, and the surfacing welding conditions include: voltage 28V, Current 180A, argon gas flow 16L / min.

[0072] The hardness test was carried out on the strengthened surface of the mold, and the hardness value was 56HRC. The strengthened mold is used for extrusion production, and the mold trial production is carried out first, and the product size and surface state are tested to meet the...

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Abstract

The invention provides a strengthening method for a bearing land of an aluminum profile extrusion hot working die, and belongs to the field of surface strengthening of an aluminum profile extrusion manufacturing die in the colored industry. According to the strengthening method, by strengthening the bearing land of the die, the reinforced die does not need to be subjected to nitriding treatment, and the service life of the reinforced die is higher than that of a multi-time nitriding die, so that on the premise of ensuring the product quality, the die changing in the extrusion process can be reduced, and meanwhile, the die assembling and unloading, alkali washing, grinding and nitriding processes in the multiple nitriding processes are reduced, and the production cycle and the manufacturingcost are saved. Meanwhile, due to the fact that the surface of the bearing land of the reinforced die is kept bright, the surface brightness of an aluminum profile is higher, and the aluminum profilewith the requirement on the brightness of the surface is more advantageous.

Description

technical field [0001] The invention relates to the technical field of strengthening the surface of a mold for extrusion manufacturing of aluminum profiles in the non-ferrous industry, in particular to a strengthening method for a working belt of an extrusion hot-working die for aluminum profiles. Background technique [0002] In aluminum profile production enterprises, the quality of the mold and whether the mold can be used and maintained reasonably directly determine whether the enterprise can produce profiles normally and qualified. The working conditions of extrusion dies in profile extrusion production are very harsh, not only need to withstand severe friction and wear under high temperature and high pressure, but also need to withstand cyclical loads. All of these require the mold to have high thermal stability, thermal fatigue resistance, thermal wear resistance and sufficient toughness. [0003] Surface nitriding treatment can greatly improve the surface hardness o...

Claims

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Application Information

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IPC IPC(8): C23C30/00C23C24/10B23P15/24C22C38/02C22C38/04C22C38/52C22C38/42C22C38/46C22C38/44
CPCB23P15/24C22C38/02C22C38/04C22C38/42C22C38/44C22C38/46C22C38/52C23C24/106C23C30/005
Inventor 王德伟黄仲佳朱超兵王德奎孙全
Owner 芜湖点金机电科技有限公司
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