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Pre-hardened type 3Cr2MnNiMo plastic mould steel

A plastic mold steel, pre-hardened technology, applied in the field of plastic mold steel, can solve the problems of unfavorable mold manufacturing development, high price, unsatisfactory cutting performance, etc., to achieve better processing effect, large size, and avoid mold deformation. Effect

Inactive Publication Date: 2019-10-11
湖北长怡特殊材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is exactly at present domestic pre-hardened plastic mold steel 3Cr 2 The cutting performance of MnNiMo is not ideal, and the price of imported products is high, which is not conducive to the development of the mold manufacturing industry. A pre-hardened 3Cr 2 MnNiMo plastic mold steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] This embodiment is a pre-hardened 3Cr 2 MnNiMo plastic mold steel, the plastic mold steel contains the following components in weight percentage: C: 0.28%, Mn: 1.20%, Si: 0.15%, Cr: 1.60%, Mo: 0.32%, Ni: 1.00%, the balance It is Fe; the quenching temperature of the steel billet during the processing of the plastic mold steel is 830°C, and the holding time is 30min. The temperature is 510°C, and the holding time is 20 minutes.

Embodiment 2

[0013] This embodiment is a pre-hardened 3Cr 2 MnNiMo plastic mold steel, the plastic mold steel contains the following components in weight percentage: C: 0.35%, Mn: 1.30%, Si: 0.25%, Cr: 1.70%, Mo: 0.20%, Ni: 0.70%, the balance It is Fe; the quenching temperature of the steel billet during the processing of the plastic mold steel is 850°C, and the holding time is 30min. The temperature is 530°C, and the holding time is 30 minutes.

Embodiment 3

[0015] This embodiment is a pre-hardened 3Cr 2 MnNiMo plastic mold steel, the plastic mold steel contains the following components in weight percentage: C: 0.38%, Mn: 1.55%, Si: 0.30%, Cr: 1.80%, Mo: 0.50%, Ni: 1.10%, the balance It is Fe; the quenching temperature of the steel billet during the processing of the plastic mold steel is 860°C, and the holding time is 40min. The temperature is 550°C, and the holding time is 30 minutes.

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Abstract

The invention discloses pre-hardened type 3Cr2MnNiMo plastic mould steel. The plastic mould steel comprises the following components including, by weight, 0.28%-0.38% of C, 1.20%-1.55% of Mn, 0.15%-0.30% of Si, 1.60%-1.80% of Cr, 0.20%-0.50% of Mo, 0.70%-1.10% of Ni and the balance Fe. In a processing process of the plastic mould steel, the steel billet quenching temperature is 830 DEG C-860 DEG C, heat-preserving time lasts for 30-40 minutes, oil-bath cooling is performed to 50-80 DEG C after tapping from a quenching furnace for air-cooling to the room temperature, the plastic mould steel immediately enters a tempering furnace for tempering at the tempering temperature being 510-550 DEG C, and heat-preserving time lasts for 20-30 minutes. The mould steel is suitable for manufacturing an oversized high-precision plastic mould and brightly polishing a large mould, and is especially suitable for processing product plastic moulds such as communication electrical appliances.

Description

technical field [0001] The invention relates to the technical field of plastic mold steel, in particular to a pre-hardened 3Cr 2 MnNiMo plastic mold steel. Background technique [0002] Currently commonly used pre-hardened plastic mold steel 3Cr 2 MnNiMo has the following problems in its cutting performance: 1. The non-metallic inclusions in the steel affect the cutting performance and seriously damage the cutting performance; 2. The processing technology will cause the composition segregation in the steel, which is not conducive to the surface processing quality and performance of the steel; 3. Poor mirror polishing, not suitable for processing precision molds. In view of the current domestic pre-hardened plastic mold steel 3Cr 2 The polishing performance and mechanical properties of MnNiMo are not up to the requirements, and cannot meet the needs of the domestic mold manufacturing industry. The high price of imported mold steel is not conducive to the development of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/04C22C38/58C22C38/02C22C38/44C21D6/00C21D1/18
CPCC21D1/18C21D6/004C21D6/005C21D6/008C22C38/02C22C38/04C22C38/44C22C38/58
Inventor 陈俊波刘鹏涛卢敏
Owner 湖北长怡特殊材料科技有限公司
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