CN104120371A

CN104120371A - Free-cutting steel product for injection mold

Info

Publication number: CN104120371A
Application number: CN201410338329.9A
Authority: CN
Inventors: 朱卫华
Original assignee: CHUZHOU AIDE MOULD EQUIPMENT Co Ltd
Current assignee: CHUZHOU AIDE MOULD EQUIPMENT Co Ltd
Priority date: 2014-07-16
Filing date: 2014-07-16
Publication date: 2014-10-29

Abstract

The invention relates to a free-cutting steel product for an injection mold. The free-cutting steel product is composed, by weight, 0.05 percent to 0.13 percent of C, 0 percent to 0.15 percent of Si, 0.8 percent to 1.4 percent of Mn, 0.03 percent to 0.1 percent of P, 0.2 percent to 0.5 percent of S, 0 percent to 0.15 percent of Cr, 0.05 percent to 0.22 percent of B, 0.003 percent to 0.02 percent of N, 0.007 percent to 0.012 percent of Bi, 0.01 percent to 0.18 percent of Cu, 0.005 percent to 0.1 percent of Ti, 0 percent of 0.1 percent of impurities and the balance Fe. The free-cutting steel product for the injection mold is good in environment protection performance, meanwhile, the additive amount of Bi and the additive amount of Ti are not much, the cost is low, and utilization and popularization of the free-cutting steel product are facilitated.

Description

A kind of injection mold free-cutting steel material

Technical field

The present invention relates to ferrous metallurgy field, be specifically related to a kind of injection mold steel.

Background technology

Along with the development of the development of mechanical workout high speed, precise treatment, automatization, particularly automotive industry, precision meter industry and household electrical appliance etc., the demand both at home and abroad of various precision parts is increasing.In the production cost of injection mold, cut cost and account for more than 60%, show the importance of good metal cutting performance and the good overall cutting solution economic production to mould.Hardness is an important factor that affects metal cutting performance.Universal law is that steel is harder, just more difficult processing.Rapid steel (HSS) can be used for workhardness and is up to the material of 330-400HB; Rapid steel+titanizing nitrogen (TiN) coating, can workhardness be up to the material of 45HRC; And the material that is 65-70HRC for hardness must use Wimet, pottery, sintering metal and cubic boron nitride (CBN).How to make the existing hardness of mould of life-time service there is again good machinability and become problem demanding prompt solution.

Summary of the invention

In view of above-mentioned deficiency of the prior art, the present invention relates to a kind of injection mold free-cutting steel material, mechanical property and machinability are good.

The present invention is by the following technical solutions:

A kind of injection mold free-cutting steel material, component by following weight percent forms: C 0.05 ~ 0.13%, Si 0 ~ 0.15%, Mn 0.8 ~ 1.4%, P 0.03 ~ 0.1%, S 0.2 ~ 0.5%, Cr 0 ~ 0.15%, B 0.05 ~ 0.22%, N 0.003 ~ 0.02%, Bi 0.007 ~ 0.012%, Cu 0.01 ~ 0.18%, Ti 0.005 ~ 0.1%, impurity 0 ~ 0.1%, all the other are Fe.

Preferably, the weight percent of described C is 0.08 ~ 0.11%; The weight percent of Cr is 0.01%～0.1%; The weight percent of N is 0.005%～0.13%; The weight percent of Cu is 0.01%～0.08%.

Preferably, between Cr, Mn, S, the relation of content weight percent meets following relational expression: 0.8%≤Cr+Mn+S≤3%; Between B, Mn, the relation of content weight percent meets following relational expression: 0.04≤B/Mn≤0.3.

Injection mold free-cutting steel of the present invention, the feature of environmental protection is good, and meanwhile, the addition of bismuth and titanium is few, and cost is lower, is conducive to the utilization and extention of free-cutting steel.

Embodiment

In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.

Embodiment 1

Injection mold free-cutting steel material, component by following weight percent forms: C 0.05%, Mn 0.8%, P 0.1%, S 0.5%, Cr 0.15%, B 0.05%, N 0.003%, Bi 0.007%, Cu 0.01%, Ti 0.005%, impurity 0.1%, all the other are Fe.

Embodiment 2

Injection mold free-cutting steel material, is made up of the component of following weight percent: C 0.13%, Si 0.15%, Mn 1.4%, P 0.03%, S 0.2%, B 0.22%, N 0.02%, Bi 0.012%, Cu 0.18%, Ti 0.1%, all the other are Fe.

Embodiment 3

Injection mold free-cutting steel material, component by following weight percent forms: C 0.1%, Si 0.1%, Mn 1.2%, P 0.05%, S 0.35%, Cr 0.1%, B 0.1%, N 0.01%, Bi 0.01%, Cu 0.1%, Ti 0.01%, impurity 0.05%, all the other are Fe.

Be more than preferred embodiments of the present invention, but protection scope of the present invention is not limited to this.Any those of ordinary skill in the art are in the disclosed technical scope of the present invention, and the conversion of expecting without creative work or replacement, within all should being encompassed in protection scope of the present invention.Therefore protection scope of the present invention should be as the criterion with the protection domain that claim was limited.

Claims

1. an injection mold free-cutting steel material, it is characterized in that, component by following weight percent forms: C 0.05 ~ 0.13%, Si 0 ~ 0.15%, Mn 0.8 ~ 1.4%, P 0.03 ~ 0.1%, S 0.2 ~ 0.5%, Cr 0 ~ 0.15%, B 0.05 ~ 0.22%, N 0.003 ~ 0.02%, Bi 0.007 ~ 0.012%, Cu 0.01 ~ 0.18%, Ti 0.005 ~ 0.1%, impurity 0 ~ 0.1%, all the other are Fe.

2. injection mold according to claim 1 free-cutting steel material, is characterized in that: the weight percent of C is 0.08 ~ 0.11%.

3. injection mold according to claim 1 free-cutting steel material, is characterized in that: between Cr, Mn, S, the relation of content weight percent meets following relational expression: 0.8%≤Cr+Mn+S≤3%.

4. injection mold according to claim 1 free-cutting steel material, is characterized in that: between B, Mn, the relation of content weight percent meets following relational expression: 0.04≤B/Mn≤0.3.

5. according to the bismuth-containing free-cutting steel material described in claim 1, it is characterized in that, the weight percent of Cr is 0.01%～0.1%; The weight percent of N is 0.005%～0.13%; The weight percent of Cu is 0.01%～0.08%.