DE3413870A1 - Multiply connected aluminium and silicon bronze alloy - Google Patents

Abstract

Multiply connected aluminium bronze alloy with little or no Mn and comprising 0.5-2.5 % of Si for improving hot and cold characteristics.

Description

Multiply connected aluminum and silicon bronze

alloy It is known that the largest part of the whole Metal manufacturing used in industry in the form of alloys to some To change the properties of the metallic components, with some characteristics being perfected or errors can be corrected.

One important category of alloys is that of the many Aluminum-bronze alloys.

Din characteristic of these alloys is the presence of the Mn to his to improve big properties in particular deformability. One already in the trade type of alloy with the name Nialloy 2510, also from the manufacturer of this Invention devised which have high properties with a low percentage of Nn With regard to strength against mechanical stresses and corrosion resistance is composed as follows: NI 14 -AL 8.5 + Zn 9.5 - 10.5% Fe maximum 1 Mn P + Sn + S + Pb maximum 7.7 6b Cu remainder The mechanical properties in the state of Raw castings can be accepted as follows: Strength 608 N7mm² elastic limit 265 elongation 11% Brinell hardness 160 HB Main feature of this alloy is the company that allows the alarm to be pressed even in pieces over one kilogram.

The present invention greatly improves the properties of these alloys, as shown below.

The invention relates to a quaternary, multiply connected Aluminum-bronze alloy which, besides the absence or great reduction of the Percentage of Mn has a Fro percentage of Si of 0.5 to 2.5%.

The percentages of the other ingredients stay about like that of the alloy Nialloy 2510, which we have already quoted, except that the impurities P + Sn + Pb in the present invention strong with a maximum of 0.03% to reduce.

The composition of this alloy is as follows: Ni 12 -Al 8.5 - 10.5 Zn 8.5 - 10.5% Be maximum Mm maximum 0.15 Si 0.5 - 2.5% P + Sn + S + Ps maximum 0.03% Cu remainder The contribution of the bi has to a significant extent the mechanical cold and heat properties improved as indicated in the table below which indicates the values determined during the rehearsals.

Strength 686 N / mm2, elastic limit 520 N / mm² These Alloy is opposed to heat treatments such as annealing, normalization, hyperhardening and others, particularly sensitive, with which they are suitable for a wide variety of uses is made suitable.

The percentages of improvement due to the condition of the raw casting are specified, also take place with the different properties of the alloy as a result of the various hot and cold treatments, such as forging, pressing, extrusion, rolling, drawing, sinking, embossing, acquires.

For example, the hardness or the toughness increases significantly.

With a complete annealing brought to 900 ° for example can reduce the strength and elasticity limit of 30% with a Increase in elongation of 100, o can be achieved.

The positive effect of the contribution to Si also appears clearly from the "State diagram t.

The boundaries between the "alfa" phase and the "alfa + gamma" phase "(corresponding to the beginning of the fragile compositions above the eutectoid ) are shifted to the 'alfa' phase in the event of a strong reduction in brittleness.

The alloy subject of the invention is a treatment of the commuting Annealing significantly increases the range of mechanical values.

Briefly summarized, one obtains: The improvement in the warming properties.

Better wear resistance in hot and cold conditions.

Better resistance to viscous slip.

Rose-free in heat and cold.

Lower density and therefore lower specific weight Lesser ones Thermal expansion Greater sensitivity to annealing, normalizing and byper-hardening.

Raw mechanical hot and cold properties.

Invariance in the mechanical properties up to 4000.

Can be used up to 8500.

Elastic limit more than 95.

Excellent gloss polishing.

High heat and cold resistance, erosion resistance, strength of the Cavitation opposite.

Particularly stable structure, which is why the appearance of crystallization and fragility due to alternate stresses and repeated impacts is avoided.

Suitability for hot pressing.

Particularly suitable for use in the chemical, glass, food and extraction industries, in the Schiffau and especially suitability for the manufacture of gear drives, of gears, worms, endless screws, organs for superheated steam, of Slide shoes, propellers, slide bearings, crankshafts, joints, molds.

Since the uses of the invention as a directional and not as a Limiting examples have been described, it is tacitly understood that every equivalent application of the cited invention terms and every loud the features of the invention carried out and / o working product in their Protected area is included.

Claims (5)

Claims 1. Multiply connected aluminum-bronze alloy, denoted by the presence of significant amounts of silicon included within the values 0.5-2.5%, by the flour of Mn or by its strong reduction, the does not exceed the value of 0.15, oo 'and is based on an inclusion value and not of an alloy element keeps the impurities P + Sn + S + Pb a maximum ert of 0.03%, all with the improvement in the properties when heated and in the cold, wear resistance and viscous sliding. 2. Multiply connected aluminum-bronze alloy as under claim 1, denoted by the fact that in the "state diagram" the boundary between the phases alfa and alfa + gamma against the phase alfa is shifted when the Brittleness. 3. Multiply connected aluminum-bronze alloy as under claim 1, denoted by the fact that it is also through heat treatments such as annealing, normalization, Hyperhardening and others, suitable for the most varied uses, with special Suitability for use in the chemical glass industry, the food industry, the conveying industry, in shipbuilding and especially for the manufacture of gears, screws, endless Screws, organs for superheated steam, of track shoes, crankshafts, joints, Forms and from many other organs. 4. Multi-bonded aluminum-3-bronze alloy as under claim 1, denoted by the following preferred composition: Ni 12-20 S Al 8.5 - 10.5% Zn 8.5 -Fe maximum Mn maximum Si 0.5 - 2.5% F + Sn + S + Pb maximum 0.03 remainder Cu whereby in the state of the raw casting, significantly better first to the known alloys and approximately the following are presented: Strength 686 N / mm2 elastic limit 52b elongation 5% Brinell hardness HB 190 and due to the various treatments and transformations greater hardness and greater toughness. 5. Multi-bonded aluminum-bronze alloy as under claim 1, denoted by the fact that the area of the mechanical Values is increased significantly.