Quenching and tempering 3Cr2MnNiMo pre-hardening plastic die steel
A plastic mold steel and hard plastic technology, which is applied in the field of plastic mold steel, can solve the problems of unfavorable mold manufacturing industry development, high price, and unsatisfactory cutting performance, and achieve good cutting performance, high hardenability, and comprehensive mechanics. good performance
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[0011] Example 1
[0012] Quenched and tempered 3Cr of this embodiment 2 MnNiMo pre-hardened plastic mold steel, the plastic mold steel contains the following components by weight percentage: C: 0.36%, Mn: 1.30%, Si: 0.30%, Cr: 1.85%, Mo: 0.32%, Ni: 1.0% , The balance is Fe, the plastic mold steel has the hardness of HRC33; the quenching temperature of the billet of the plastic mold steel during the processing is 845℃, the holding time is 50min, the oil bath is cooled to 60℃ after the quenching furnace is air cooled When it reaches room temperature, it immediately enters the tempering furnace for tempering. The tempering temperature is 520℃, the holding time is 30min, the billet flat material thickness is 300mm, the width is 700mm, suitable for manufacturing large molds; the plastic mold steel is in the melting process It adopts secondary smelting homogeneous desulfurization process.
Example Embodiment
[0013] Example 2
[0014] Quenched and tempered 3Cr of this embodiment 2 MnNiMo pre-hardened plastic mold steel, the plastic mold steel contains the following components by weight percentage: C: 0.32%, Mn: 1.10%, Si: 0.40%, Cr: 1.70%, Mo: 0.40%, Ni: 0.85% , The balance is Fe, the plastic mold steel has a hardness of HRC30; the quenching temperature of the billet of the plastic mold steel during processing is 830°C, the holding time is 60min, and the oil bath is cooled to 50°C after the quenching furnace is released. At room temperature, immediately enter the tempering furnace for tempering. The tempering temperature is 530°C, the holding time is 40min, and the billet forging circle specification is φ100mm, which is suitable for manufacturing small precision molds; the plastic mold steel uses secondary Smelting homogeneous desulfurization process.
Example Embodiment
[0015] Example 3
[0016] Quenched and tempered 3Cr of this embodiment 2 MnNiMo pre-hardened plastic mold steel, the plastic mold steel contains the following components by weight percentage: C: 0.40%, Mn: 1.50%, Si: 0.20%, Cr: 2.00%, Mo: 0.25%, Ni: 1.15% , The balance is Fe, the plastic mold steel has a hardness of HRC36; the quenching temperature of the billet during the processing of the plastic mold steel is 860℃, and the holding time is 40min. After the quenching furnace is released, the oil bath is cooled to 100℃ and air cooling When it reaches room temperature, it immediately enters the tempering furnace for tempering. The tempering temperature is 500℃, the holding time is 20min, and the billet forging circle specification is φ400mm, which is suitable for processing large molds; the plastic mold steel adopts secondary melting during the melting process Homogeneous desulfurization process.
[0017] The cutting performance of the plastic mold steel produced in Examples 1-3 of...
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