CN104046922B - spring wire - Google Patents

Abstract

The invention discloses a kind of spring wire, its chemical composition and percentage by weight are: C:0.06%～0.09%, Cr:18.0%～19.0%, Mn≤2.0%, N:0.08%～0.12%, Si≤1.00%, Ni:8.0～9.0%, P≤0.040%, S≤0.015%, Mo≤0.5%, Cu≤0.5%, surplus is Fe and not removable impurity, by improving N content, makes the strength and toughness of spring wire all can meet standard.

Description

Spring wire

Technical field

The present invention relates to a kind of spring wire.

Background technology

Stainless steel spring line is applied to spraying spring, high temperature spring, welding battery, stainless steel stage clip, extension spring torsion spring, heightIntensity spring, high tired spring, medical spring, nonmagnetic spring, braiding spring etc., purposes is very extensive, but high-order producesProduct all use import wire rod, and domestic wire rod can only provide lower-order industry to use, and main cause is that wire rod poker characteristic is not good, visitorDifferent in size after the processed springs of family, the problem such as pulling force is unstable.

Summary of the invention

The object of the invention is to overcome the defect existing in prior art, the spring of the high and good toughness of a kind of intensity is providedLine.

For achieving the above object, technical scheme of the present invention has been to provide a kind of spring wire, a kind of spring wire, and its chemistry becomesPoint and percentage by weight be: C:0.06%～0.09%, Cr:18.0%～19.0%, Mn≤2.0%, N:0.08%～0.12%, Si≤1.00%, Ni:8.0～9.0%, P≤0.040%, S≤0.015%, Mo≤0.5%, Cu≤0.5%, surplus is Fe and not removableImpurity.

As preferably, C:0.08%, Si:0.36%, P:0.031%, S:0.002%, N:0.105%, Ni:8.06%, Cr:18.72%, Mo:0.11%, Cu:0.34%, Mn:1.26%, surplus is Fe and not removable impurity.

Alloying element of the present invention determine according to as follows:

CWHF is the hardening index of assessment cold working, and its assessment formula is as follows

CWHF=173.7525+67.4059C+10.693Si-0.894Mn-0.923Cr

-5.5513Ni+67.4074N-9.432Cu；

Because the N content of original steel grade is lower, while pulling into spring wire finished product, its TS all falls within specification lower limit, causes client to makeUsed time has abnormal doubt, therefore TS is adjusted to the center line of specification limit as far as possible, makes the process conditions can be comparatively stable, and byTo improve fast its work hardening if upper formula can very clearly be understood, increase C and N and be mode the most fast, but have it because of CUpper limit regulation, therefore be not suitable for doing and adding again, therefore select to add in right amount N content, can promote the intensity after its processing more again.

Advantage of the present invention and beneficial effect are: by improving N content, the strength and toughness of spring wire all can be accorded withStandardization.

Brief description of the drawings

Fig. 1 is the 15th stability trial result: CP:0.443 of the present invention;

Fig. 2 is the 18th stability trial result: CP:0.849 of the present invention.

Detailed description of the invention

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is further described. Following examples onlyFor technical scheme of the present invention is more clearly described, and can not limit the scope of the invention with this.

A kind of spring wire, its chemical composition and percentage by weight are: C:0.06%～0.09%, Cr:18.0%～19.0%, Mn≤2.0%，N：0.08%～0.12%，Si≤1.00%，Ni：8.0～9.0%，P≤0.040%，S≤0.015%，Mo≤0.5%，Cu≤ 0.5%, surplus is Fe and not removable impurity.

Embodiment after optimization is, a kind of spring wire, and its chemical composition and percentage by weight are: C:0.08%, Si:0.36%，P：0.031%，S：0.002%，N：0.105%，Ni：8.06%，Cr：18.72%，Mo：0.11%，Cu：0.34%，Mn：1.26%, surplus is Fe and not removable impurity.

Spring wire in the present invention intensity is now 910mpa, 0.2% yield strength: 501, and percentage elongation is that 36% it is strongDegree and toughness all can reach client and use standard, show the 15th time and the 18th stability examination of the present invention in Fig. 1, Fig. 2Result processed.

The above is only the preferred embodiment of the present invention, it should be pointed out that the ordinary skill people for the artMember, not departing under the prerequisite of the technology of the present invention principle, can also make some improvements and modifications, these improvements and modificationsAlso should be considered as protection scope of the present invention.

Claims (1)

1. a spring wire, is characterized in that: its chemical composition and percentage by weight are C:0.08%, Si:0.36%, and P:0.031%, S:0.002%, N:0.105%, Ni:8.06%, Cr:18.72%, Mo:0.11%, Cu:0.34%, Mn:1.26%, surplusFor Fe and not removable impurity.