CN1182913C - Ferrous-nickel base catalyst alloy for synthesizing artificial diamond - Google Patents

Abstract

The present invention discloses iron-nickel base catalyst alloy for synthesizing artificial diamond, which comprises the components of 10 to 40 wt% of nickel, 2 to 8 wt% of manganese and iron as the rest. Expensive precious metal cobalt does not need to be used for raw materials, the contents of the nickel and the manganese are reduced more than those of the prior art, and thus, compared with the existing Ni-Fe base catalyst alloy, the material cost is reduced by more than 20%. The catalyst alloy can be applied to the synthesis of coarse-particle, high-strength and good-quality diamond. The artificial diamond synthesized by the catalyst has the advantages of centralized peak value, golden yellow color and high transparence and has the advantages that the peak value of 40 to 60 accounts for more than 65%, the static pressure strength of the peak value yield more than or equal to 13kg accounts for more than 35%.

Description

The Fe-Ni based catalyst alloy of a kind of used to synthesize artificial diamond

Technical field:

The present invention relates to the Fe-Ni based catalyst alloy of a kind of used to synthesize artificial diamond.

Background technology:

Present domestic diamond industry generally uses the NiMnCo alloy to produce coarse granule, high-strength artificial diamond, modal is to be with alloy component (weight %): the alloy of nickel 70, cobalt 5, manganese 25 is done catalyst material, this material is because noble metal ratio height, thereby price is expensive, cost height, publication number CN1098144A patent of invention provide a kind of " ferronickel base catalyst alloy " its composition (weight %) to be: Fe is that 15-25%, Mn are that 10-20%, Cr are that 0.5-1.2%, Ni are surplus.But though this catalyst alloy synthesising coarse particle, high strength gem grade diamond, but its cost of material is still higher, because it is the same with the domestic most catalyst alloys such as NiMnCo that generally use, need a large amount of price metallic nickel, manganese more much higher that use than iron, the content of Ni is still up to more than 50% in the component, manganese is also in the 10-20% scope, and at present diamond fabrication industry producer be starved of a kind of can synthesising coarse particle, the cheap catalyst of high strength gem grade diamond.

Summary of the invention:

At the problem that prior art exists, the invention provides and a kind ofly further reduce production costs, reduce nickel, manganese consumption, be exclusively used in synthesising coarse particle, the adamantine Ni-Fe base catalyst alloy of high-strength artificial.

Technical scheme of the present invention is: alloy component (weight %) is nickel 10-40, manganese 2-8, and all the other are iron.

Owing to do not need to use expensive noble metal cobalt in the raw material, the content of nickel and manganese also reduces many than prior art, therefore reduce more than 20% than existing Ni-Fe base catalyst alloy cost of material.Show that through experiment repeatedly this catalyst alloy can be applicable to coarse granule, high strength gem grade diamond synthetic.Utilize the synthetic diamond peak value of this catalyst to concentrate, the accounting example of 40-60 is more than 65%, and peak value output isostatic pressing strength 〉=13kg proportion is more than 35%, and the diamond color is golden yellow, the transparency height.

The specific embodiment:

Alloy of the present invention adopts conventional powdery or sheet processing method, prepares burden vacuum melting by the listed component of table 1 (weight %).

The chemical composition scope of FeNi base catalyst has been prepared 4 batches of catalyst according to the present invention, and table 2 provides the concrete chemical composition for preparing above-mentioned 4 batches of catalyst compounds, and table 3 provides the performance indications of aforementioned 4 batches of catalyst.

Table 1 Fe-Ni base catalyst charge composition (weight %)

Ni	Mn	Fe
			10-40	2-8	Surplus

Table 2

Numbering	Ni	Mn	Fe
				1	15	8	77
2	25	6	69
				3	35	5	60
4	40	4	56

Table 3

Numbering	The 40-60 proportion	70/80 with slightly	Peak value output isostatic pressing strength 〉=13kg proportion	Color
					1	65％	79％	35％	Golden yellow
2	66％	81％	36％	Golden yellow
					3	67％	83％	37％	Golden yellow
4	69％	85％	38％	Golden yellow
					5	70％	87％	40％	Golden yellow

Claims (1)

1. used to synthesize artificial diamond iron-nickel accelerant alloy, it is characterized in that: the percentage by weight of alloy component is: nickel 10-40, manganese 2-8, all the other are iron.