GOST 28377-89

• gost-28377-89.pdf (250.22 KiB)
  ГОСТ 28377-89

GOST 28377−89 Powders for thermal spraying and surfacing. Types

GOST 28377−89. INTERSTATE STANDARD

POWDERS FOR THERMAL SPRAY
COATING AND SURFACING TYPES

INTERSTATE STANDARD

POWDERS FOR THERMAL SPRAYING AND SURFACING Types. Powders for gasothermic spraying and depositing. Types

Date of introduction 01.01.91

This standard specifies the types of powders, classified by main parameters, and applies to powders of metals, alloys, compounds (powders) are designed for thermal (heat) spraying and surfacing of various coating: heat-resistant, wear-resistant, corrosion-resistant, heat and electric insulating, etc., and also to recover worn parts.

1. Powders for thermal spraying and surfacing klassificeret for getter methods, particle size, chemical composition.

1.1. According to the method of obtaining powders are divided into classes in accordance with table. 1.

Table 1

Note. The letter P means «powder», the following letter is the first letter of the method of obtaining.

1.2. Particle size powders are divided into classes in accordance with table. 2.

Table 2

1.3. The chemical composition of the powders are divided into groups and subgroups in accordance with table. 3.

Table 3

^* Contains the composition of silicon and boron.

Notes:

1. Marking fractions in the group of powder mixtures is given respectively for each component of the mixture.

2. In the notations of the sub-groups of powders include:

appearance callouts alloy or connection — DB — boride, Br — bronze, GH — graphite, KD — carbide, L — brass, Nd — nitride, OK — oxide, St — steel, Ft — ferrite, CH — iron, W — spinel;

legend of chemical elements — nitrogen, B is niobium, the tungsten, G — manganese, TGF — hafnium, D — copper, W — hardware, It — yttrium, cobalt, KC — calcium, La — lanthanum, M — molybdenum Mg — magnesium, N — Nickel, Al — tin, P — phosphorus, P — boron, — silicon, Sm — samarium, T — Titan, f — vanadium, X — chrome, C — zirconium, E — cerium, CN — zinc, s — aluminium.

In the legend the composite powders of the components share the sign «-"; powder mixtures «+"sign.

2. In the callout powder please indicate the type of powder, then a dash mark (or a subgroup) on the chemical composition and the designation of the class or the minimum and maximum particle sizes (in micrometers) divided by the fraction.

In the designation of grades of powders according to the chemical composition include the letter designations of the elements (components) and nominal content of one to three alloying elements in a percentage that is specified after the corresponding letter.

The designation and the content of carbon and the content of the base element (component) is allowed not to specify.

Numbers, which the content of components in powder mixtures, should be specified before the designation of the components, separating an interval of the symbol.

In the notation of marks in chemical composition allowed to use the Latin symbols of elements and formulae of compounds.

Examples of symbols powders:

Powder sprayed camofluage nickelchromium alloy particle size 40 — 100 microns:

PR-НХ16СР2−7 or CR-НХ16СР2−40/100

The atomized stainless steel powder, the particle size 40 — 100 microns:

PR-Х18Н9−7 or CR-Х18Н9−40/100

Powder sprayed chromomagnetic of cast iron, particle size less than 400 microns:

PR-CHGS-16 or PR-CHGS-0/400

The atomized bronze powder, particle size 20 — 63 µm:

PR-БрЮЖ4НГ-5 or PR-БрЮ8Ж4НГ-20/63

The powder recovered nickeltitanium compounds, particle size 100 — 140 microns

PV-НТ45−10 or PV-НТ45−100/140

Powder of titanium carbide, particle size 40 — 100 microns:

PM-KDT-7 or PM-FTC-40/100

Powder of zirconium oxide, the particle size of 5 to 45 µm:

PM-EAC-2 or PM-EAC-5/45

Powder composite conglomerating based on nickelchromium alloy, particle size 40 — 100 microns:

PG-Ю5-HX-7 or PG-Ю5-HX-40/100

Powder mixture of 65% tungsten carbide particle size of 5 to 45 µm and 35% nickelchromium camofluage alloy a particle size less than 45 microns:

PS-65 CSC-2 + 35НХ16СР3−4

The recovered chromium powder 40 — 100 µm:

PV-X-7 or PV-X-40/100

3. Applications of powders to create coatings for various purposes is given in the Appendix.

APP

Reference

Applications of powders for thermal spraying and surfacing

Table 4

Note. For spraying, it is preferable to use powders with 1-th to 9-th class particle size, for welding 8th to 18th.