High-hardness high-polishing pre-hardening plastic die steel and manufacture technology thereof
A technology of plastic mold and preparation process, applied in the field of alloy steel, can solve the problems of high steel price, increase the manufacturing cost of automobile products, etc., and achieve the effect of low alloy cost, improving manufacturing level and market competitiveness, and high hardness uniformity.
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Embodiment 1
[0042] In this embodiment, the components and mass percentages of the high-hardness and high-polishing pre-hardened plastic mold steel are as follows:
[0043] C 0.40%, Si 0.30%, Mn 2.00%, Cr 2.50%,
[0044] Mo 1.00%, V 0.30%, P 0.025%, S 0.005%,
[0045] Ni 1.5%, Nb 0.15%, Fe balance.
[0046] Adopt the material in this embodiment to produce the technological process and the steps of high hardness and high polishing pre-hardened plastic mold steel as follows:
[0047] 1. Smelting: batching is carried out according to the ratio of alloying elements in the examples, and the batching is sent to the electric arc furnace for smelting and refining, and then the gas dissolved in the liquid metal is removed by vacuum degassing to prevent defects, and finally cast into steel ingots, and then Hot forging heating furnace; the use of hot delivery is to achieve the purpose of energy saving and emission reduction.
[0048] 2. High-temperature diffusion heat treatment: the steel ingot is...
Embodiment 2
[0062] In this embodiment, the components and mass percentages of the high-hardness and high-polishing pre-hardened plastic mold steel are as follows:
[0063] C 0.26%, Si 0.20%, Mn 1.7%, Cr 1.8%,
[0064] Mo 0.60%, V 0.20%, P 0.015%, S 0.002%,
[0065] Ni 1.00%, Nb 0.06%, Fe balance.
[0066] The process and steps of producing high-hardness and high-polish pre-hardened plastic mold steel using the materials in the above-mentioned embodiments are the same as those in Embodiment 1, and will not be repeated here.
[0067] The high-hardness and high-polishing pre-hardened plastic mold steel in this embodiment undergoes the above-mentioned smelting, thermal processing and heat treatment, and the final product specification is (length*width*thickness) 2500mm*1300mm*500mm module. The performance test is carried out by sampling, and the test results are as follows:
[0068] A phase change characteristics:
[0069] The CCT curve of the high hardness and high polishing pr...
Embodiment 3
[0075] In this embodiment, the components and mass percentages of the high-hardness and high-polishing pre-hardened plastic mold steel are as follows:
[0076] C 0.25%, Si 0.10%, Mn 1.50%, Cr 1.50%,
[0077] Mo 0.50%, V 0.10%, P 0.005%, S 0.001%,
[0078] Ni 0.60%, Nb 0.001%, Fe balance.
[0079] The process and steps of using the materials in this example to produce high-hardness and high-polish pre-hardened plastic mold steel are as described in Example 1, and will not be repeated here.
[0080] After the high-hardness and high-polishing pre-hardened plastic mold steel of the present invention undergoes the above-mentioned smelting, thermal processing and heat treatment, the final product specification is (length*width*thickness) 2500mm*1300mm*500mm module, sampling for performance testing, and the test results are:
[0081] A phase change characteristics:
[0082] The CCT curve of the high hardness and high polishing pre-hardening plastic mold steel of the ...
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