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Mold

A technology of mold and cold working mold steel, which is applied in the manufacture of tools, ion implantation plating, coating, etc.

Inactive Publication Date: 2012-04-04
SHANGHAI HUIZHONG AUTOMOTIVE MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there is no report on the actual application of the coating to the surface of the cold working die

Method used

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Experimental program
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Embodiment Construction

[0012] The matrix material of the mold adopts high strength and toughness cold work die steel SDC99 as the matrix material, and its chemical composition (mass percentage) is 0.92%C, 1.01%Si, 0.27%Mn, 9.50%Cr, 1.94%Mo, 0.88%V and 0.12% Ni. Compared with traditional Cr12MoV, it reduces the content of carbon and chromium, increases the content of molybdenum and vanadium, reduces and refines eutectic carbides, refines grains, and improves toughness. After high-temperature quenching and tempering treatment, the surface hardness is HRC61-62 (slightly lower than tool steel).

[0013] However, the surface hardness and strength of SDC99 steel without surface treatment are difficult to meet the wear resistance of the mold surface. At the same time, the friction pair composed of the workpiece and the mold has a large tendency to stick. Usually, the control arm flanging finishing mold of the automobile chassis undergoes about hundreds of times of cold stamping and flanging, and the surfa...

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PUM

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Abstract

The invention discloses a mold. The mold has excellent comprehensive properties. The mold is characterized in that high-strength and toughness coldwork mold steel SDC99 is utilized as a base material and a Cr-based wear-resistant anti-frictional coating CrTiAlN is coated on the surface of the base material, wherein the high-strength and toughness coldwork mold steel SDC99 comprise: by mass, 0.92% of C, 1.01% of Si, 0.27% of Mn, 9.50% of Cr, 1.94% of Mo, 0.88% of V, 0.12% of Ni and the balance of Fe; and the Cr-based wear-resistant anti-frictional coating CrTiAlN comprises: by mass, 74 to 76% of Cr, 8 to 10% of Ti, 5 to 7% of Al, 8 to 10% of N and 1% of Fe.

Description

technical field [0001] The present invention relates to a mold, especially a mold with a control arm for the manufacture of an automobile chassis. Background technique [0002] As far as auto parts manufacturers are concerned, the control arm is one of the main parts of the chassis parts. The flanging and finishing molds have extremely harsh working conditions, large instantaneous impact force, high dimensional matching between concave and convex molds, and excellent lubrication and heat conduction performance. Poor, leading to premature failure of the mold due to severe adhesive wear, the life of the mold is extremely low, which seriously affects the stability of production and the quality of the product, which is the "bottleneck" problem in the production process. [0003] Most of the dies are made of typical cold work die steel (Cr12MoV), which has good wear resistance, but it is difficult to meet the performance under extremely harsh working conditions. For example, the...

Claims

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Application Information

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IPC IPC(8): B22C9/22C22C38/46C23C14/35C23C14/06
Inventor 万紫施雯孙保良
Owner SHANGHAI HUIZHONG AUTOMOTIVE MFG
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