Method for producing powder metal materials

A material produced by a method comprising:

• providing a metallurgical powder comprising a low alloy steel powder, the metallurgical powder including 0.3 up to 1.0 weight percent carbon;
• molding at least a portion of the metallurgical powder to provide a compact;
• sintering the compact at 1800° F. to 2400° F. to provide a sintered compact;
• hot forming the sintered compact to provide a hot formed compact;
• and
• heating the hot formed compact to 1000° F. to 23° F.,
• the material having tensile strength greater than 100 ksi, yield strength greater than 80 ksi, RC hardness of at least 20, and elongation greater than 2.0%.

A material produced by a method comprising:

• providing a metallurgical powder including a low alloy steel powder and 0.3 up to 1.0 weight percent carbon;
• forming a compact from at least a portion of the metallurgical powder by pressing at least a portion of the metallurgical powder in a mold at 20 to 70 tsi;
• heating the compact to a temperature greater than 1800° F. an d less than the melting temperature of the metallurgical powder to bond together the metallurgical powder and form a compact;
• pressing the compact at 20 to 80 tsi in a heated die while the compact is at a temperature of 1400° F. to 2000° F.;
• and
• heating the compact to a temperature of 1000° F. to 2300° F. and below the melting temperature of the compact, and then cooling the compact,
• the material having tensile strength greater than 100 ksi, yield strength greater than 80 ksi, RC hardness of at least 20, and elongation greater than 2.0%.

An article of manufacture, the article including a material produced by a method comprising:

• providing a metallurgical powder comprising a low alloy steel powder, the metallurgical powder including 0.3 up to 1.0 weight percent carbon;
• molding at least a portion of the metallurgical powder to provide a compact;
• sintering the compact at 1800° F. to 2400° F. to provide a sintered compact;
• hot forming the sintered compact to provide a hot formed compact;
• and
• heating the hot formed compact to 1000° F. to 2300° F.,
• the material having tensile strength greater than 100 ksi, yield strength greater than 80 ksi, RC hardness of at least 20, and elongation greater than 2.0%.

An article of manufacture, the article including a material produced by a method comprising:

• providing a metallurgical powder including a low alloy steel powder and 0.3 up to 1.0 weight percent carbon;
• forming a compact from at least a portion of the metallurgical powder by pressing at least a portion of the metallurgical powder in a mold at 20 to 70 tsi;
• heating the compact to a temperature greater than 1800° F. and less than the melting temperature of the metallurgical powder to bond together the metallurgical powder and from a compact;
• pressing the compact at 20 to 80 tsi in a heated die while the compact is at a temperature of 1400° F. to 2000° F.;
• and
• heating the compact to a temperature of 1000° F. to 2300° F. and below the melting temperature of the compact, and then cooling the compact,
• the material having tensile strength greater than 100 ksi, yield strength greater than 80 ksi, RC hardness of at least 20, and elongation greater than 2.0%.

A method of producing a material, the method comprising:

• providing a metallurgical powder comprising a low alloy steel powder, the metallurgical powder including 0.3 up to 1.0 weight percent carbon;
• molding at least a portion of the metallurgical powder to provide a compact;
• sintering the compact at 1800° F. to 2400° F. provide a sintered compact;
• hot forming the sintered compact to provide a hot formed compact;
• and
• heating the hot formed compact to 1000° F. to 2300° F.

A method of making a powder metal material, the method comprising:

• molding a compact from a particulate material comprising a low alloy steel powder and including 0.3 up to 1.0 weight percent carbon;
• sintering the compact at a temperature in the range of 1800° F. to 2400° F.;
• hot forming the compact to provide a hot formed compact;
• and
• heating the hot formed compact to a temperature in the range of 1000° F. to 2300° F.

A method of making a powder metal material having tensile strength greater than 100 ksi, yield strength greater than 80 ksi, RC hardness of at least 20, and elongation greater than 2.0%, the method comprising:

• molding a compact from a particulate material comprising a low alloy steel powder and including 0.3 up to 1.0 weight percent carbon at a pressure in the range of 20 to 70 tsi;
• sintering the compact to a temperature greater than 1800° F. and less than the melting temperature of the low alloy steel powder;
• pressing the compact at a pressure in the range of 20 tsi to 80 tsi while at a temperature in the range of 1400° F. to 2000° F. to provide a pressed compact;
• and
• re-sintering the pressed sintered compact at a temperature in the range of 1000° F. to 2300° F. and below the melting temperature of the compact.