GB/T 19743-2018Water-atomized pure iron powder and alloyed steel powder for powder metallurgy (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 19743-2005 "Powder metallurgy water atomized pure iron powder, alloy steel powder". This standard and GB/T 19743- Compared with.2005, the main technical content changes are as follows.

--- Product classification has increased free-cutting steel powder (see 3.2);

--- Modified some of the brand representation methods (see 3.2, 3.2 of the 2005 edition);

--- Increased some grades from 6 to 12 of the original standard (see 3.3, 3.3 of the 2005 edition);

--- Revised the chemical composition of some brands (see 4.1, 4.1 of 2005);

--- Revised the physical-process performance of some grades (see 4.2, 4.2 of the 2005 edition);

---Modified the batch rule (see 6.2, 6.2 of the 2005 edition);

---Modified the packaging method of the product (see 7.1, 7.1 of 2005 edition);

--- Increased transportation regulations for products (see 7.3);

--- Increased product storage regulations (see 7.4).

1 Scope

This standard specifies the classification, grade, technical requirements, test methods and inspection rules for powder metallurgy water atomized pure iron powder and alloy steel powder. Packaging, marking, transportation, storage and quality certificates.

This standard is applicable to pure iron powder and alloy steel powder for powder metallurgy produced by water atomization method.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 223.3 Methods for chemical analysis of steels and alloys - Determination of phosphorus content by diantipyrine methane phosphomolybdic acid gravimetric method

GB/T 223.5 Determination of acid-soluble silicon and total silicon content of steels and alloys - s.

GB/T 223.7 Determination of iron content of iron powder - Potassium dichromate titration

GB/T 223.11 Determination of chromium content in steels and alloys - either titration or potentiometric titration

GB/T 223.18 Methods for chemical analysis of steels and alloys - Separation of sodium thiosulfate - Iodometric method

GB/T 223.22 Methods for chemical analysis of steels and alloys - Determination of cobalt content by nitroso R salt spectrophotometric method

GB/T 223.23 Determination of nickel content in steels and alloys - s.

GB/T 223.25 Methods for chemical analysis of steels and alloys - s.

GB/T 223.26 Determination of molybdenum content of steels and alloys - thiocyanate spectrophotometric method

GB/T 223.34 Methods for chemical analysis of steels and alloys - Determination of hydrochloric acid insolubles in iron powder

GB/T 223.58 Determination of manganese content - Sodium arsenite - Sodium nitrite titration method

GB/T 223.59 Determination of phosphorus content in steels and alloys - phosphine molybdenum blue spectrophotometric method and bismuth phosphomolybdate blue spectrophotometric method

GB/T 223.61 Steel and alloys - Determination of phosphorus content

GB/T 223.62 Methods for chemical analysis of steels and alloys - Determination of phosphorus content by butyl acetate extraction spectrophotometry

GB/T 223.63 Determination of manganese content by sodium periodate (potassium) photometric method

GB/T 223.67 Determination of sulfur content of steels and alloys - s

GB/T 223.68 Steel and alloy chemical analysis method - Determination of sulfur content by potassium iodate titration after combustion in tubular furnace

GB/T 223.72 Determination of sulfur content of steel and alloys - Gravimetric method

GB/T 223.73 Determination of iron content of iron and steel - Titanium trichloride - Potassium dichromate titration

GB/T 1479.1 Determination of bulk density of metallic powders - Part 1

GB/T 1480 metal powder dry sieving method for particle size determination

Determination of compressibility of GB/T 1481 metal powder (excluding cemented carbide powder) in uniaxial pressing

GB/T 1482 Determination of fluidity of metal powders - Standard funnel method (Hall flow meter)

GB/T 5158.2 Determination of oxygen content by metal powder reduction method Part 2. Mass loss during hydrogen reduction (hydrogen loss)

GB/T 5158.4 Determination of oxygen content - Part 4. Determination of total oxygen content by reduction-extraction method

GB/T 5314 powder metallurgy powder sampling method

GB/T 20123 Determination of total carbon and sulfur content of steels - Infrared absorption method after burning in high-frequency induction furnaces (conventional method)