JPS58193345A - Alloy for die for cold processing - Google Patents

Abstract

PURPOSE:To attain to enhance hardness, tenacity and casting property, by adding C, Si, Mn, Cr, Mo, V, Cu to Fe in a predetermined amount. CONSTITUTION:The titled alloy consists of 0.4-1% C, 0.3-0.8% Si, 0.3-0.8% Mn, 1-2.5% Cr, 0.5-1% Mo, 0.15-0.2% V, 0.5-2% Cu and the remainder Fe. A metal mold formed by using this alloy is useful for casting and hardening, good in machinability and almost equal to a die steel in both hardness and tenacity.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a mold for use in cold working (including the cutting edge 7; the same applies hereinafter), which is capable of being cast and partially hardened, has good machinability, and is a forging mold made of special steel. This invention relates to an alloy for cold working dies that aims to provide properties similar to those of .

Conventionally, cold working dies have been exclusively made of rolled steel (S.

K, D//, /J die steels) were used, but this required forging to manufacture molds, which required time and labor, and was the main reason for the rise in mold prices. It was the cause. Therefore, proposals have been made for mold casting, but the currently proposed alloys for mold casting have insufficient hardness and toughness, and compared to the forging molds described above,
Not only is the durability significantly inferior (for example, 30
In the case of a mold that can be used in 10,000 pieces, the casting mold would need to be repaired or replaced after 30,000 to 50,000 pieces), and there were problems such as sharp parts being easily damaged.

However, this invention uses iron as the main material, with trace amounts of carbon and
Silicon, manganese, chromium, molybdenum.

By using an alloy containing vanadine and copper, it has the same hardness and toughness as die steel.

Alloy 7 was obtained which can be easily cast and has a durability of 70% or more of the die steel.

Next, the method for producing the alloy of the present invention will be explained.
6% manganese material and iron-vanadine alloy (50 x 50
Weigh and add vanadine θ (calculated based on the content of the ratio) and dissolve it by applying two currents. When all of the above input materials have been dissolved, chrome@C iron'IO x chrome 60. Chromeco, o%
calculation) and steel alloys (sox so copper/.

Reprint of specification (no change in content) Calculated based on O2 content) %: Weighed and added, melted and MI metal making using the alloy of this invention can be done. After cutting to the exact dimensions, quenching,
After tempering and polishing the gold piece obtained above, the mechanical properties after casting are as follows.

Next, the relationship between quenching temperature and hardness is shown in Figure 1. In other words, as the quenching temperature rises, the fc bottom also increases, and the tto
cyt dosh t,,'c,tonor;g-'c+*
uzm, cv protection. Also, regarding the blade part of the above *
(The end surface of the mold was maintained for a period of time and then air cooled to a depth of 2
Quenching was completed over two widths of the throat. In this case, the hardness of a part of the mold corner is toll, IL. C (hardness before treatment xx0g14, It, C). In addition, the hardness of the throat width (the side far from the corner) in the width direction is 01l.

R, C, and the quenching depth was below / order.

The alloy of this invention has carbon o,ll~/,0%, silicon 0.3
~06g%, manganese 0.3chi~o6g%, chrome/
.

θ~; t, s%, molybdenum 0°S~/, θ%, vanadium 70.15~0. Within the range of Yuchi and copper O0S ~ 2.0, it has the same properties as the above, and the durability is also 2.
It was revealed in '1'-11 that it can withstand processing of over 00,000 pieces.

It was observed that there was no damage during use, and the toughness was also high.

[Brief explanation of the drawing]

The figure is a graph of the relationship between quenching temperature and hardness. 1 Patent Applicant: Tatsu Hirahara, Hiroshi Hirahara, Agent: Masashi Suzuki, Director General of the Japan Patent Office, Shima, 1) Hibiki, 1. Indication of the case: Showa S. F. Patent Application No. 7373 No. 2, Invention Name: Ray cold-worked metal alloy 3, relationship to the amended case Patent applicant: 4, agent (zip code: 160) Address: Tokumei Building, 29 Shinanomachi, Shinjuku-ku, Tokyo Telephone: Tokyo (,353) 3 4 0 7' (Main) 2 Contents of amendment (1) The scope of the claims is as attached. -) "S, ni, D" is corrected to 7rSKDJ on page 1 of the specification, lines is to /6. (3) "Vanadine" is corrected to "vanadium" in lines 9, 74, and 17 of page 1 of the specification, respectively. (ql In the specification 3, lines 3 to q, the phrase "if injected and hardened" has been corrected to "if it is cast", and in line 76 of the same page, (l(, R, C4) should be corrected as [1-IRcJ. On the same page/line 2, the phrase "with 1 burner" should be corrected with ``with burner. From ``H'' to ``H'' and ``R'' respectively.
. "C" was corrected to "HRC", and the second line of the same page read "HRC".
Correct "vanadine" to "vanadium". and List of attached documents (1) Scope of claims? Written document 1
Claims of the patent The main material is iron, and carbon o, e~/, 0 yen, silicon 0.
3~0.17;%, 77 gun 0.3~θ, f%,
Chrome/,0-u,! r%, -1-lipdey O
,s ~/, 0%, vanadium 0. /! ~O, flathead and steel 06! ;-2.0% addition of alloy for cold working mold procedure amendment (Director of the Japan Patent Office tI Kazuo Sugi 1,
Incident display Showa! 7 Years of Permission No. 7 JfJ Case No. 3 Relationship with the case of the person making the amendment Patent applicant name: Tatsuo Hirahara 〆 14 4, Agent (zip code: 160) Address: Tokumei Building Showa, 29 Shinanomachi, Shinjuku-ku, Tokyo July near day

Claims (1)

[Claims] The main material is iron, with 0% carbon, 0% silicon, and 0% silicon.
O0 to 3! ! :L%, manganese 0.3~O5 tic chrome/. 0 to 2.5 inches, molybdenum O0S to 1. Ochi,
Vanadine 0.7&-n, 2% and copper 0.5-2.0%
Alloy for cold working molds made by adding