Abstract: The disclosure provides a method for heat-treating a boron steel, which includes: carburizing a boron steel on a surface thereof to obtain a carburized boron steel; austenitizing the carburized boron steel at a temperature of 885-895° C. for 25-35 min, to obtain an austenitized boron steel; sequentially subjecting the austenitized boron steel to an oil quenching and a tempering, wherein the oil quenching is performed at a temperature of 55-65° C. for 29-31 min.

Abstract: The present disclosure belongs to the technical field of welding materials, and in particular relates to a Fe—Ni based alloy welding wire for welding 800H alloy and a preparation method thereof and a method for welding 800H alloy. The Fe—Ni based alloy welding wire for welding 800H alloy provided by the present disclosure has a reasonable chemical components, and after being used to weld 800H alloy, the obtained weld has a tensile strength of 557.6 MPa and an elongation of 37.5% at ambient temperature, and has a tensile strength of 420 MPa and an elongation of 17.25% at a temperature of 650° C.

Abstract: A superalloy seamless pipe and a preparation method thereof are provided. The superalloy seamless pipe comprises the following components in percentages by weight: C:0.01-0.06%, Si:0.40-1.00%, Mn:0.30-1.00%, P?0.025%, S?0.020%, Cr:15.00-17.00%, Ni:44.00-46.00%, Al:2.90-3.90%, Ce:0.01-0.03%, Ti:0.10-0.30%, N:0.03-0.08%, and the balance of Fe and inevitable impurities.

Abstract: A process for preparing various morphology NTE compound ZrW0.5Mo1.5O8 comprising: preparing 0.4M Zr4+ solution, 0.2M W6+ solution and 0.6M Mo6+ solution with zirconyl nitrate, ammonium tungstate and ammo-nium molybdate separately, mixing them with the same volume and stirring until they are mixed well, adding 6-12M hydrochloric acid with the volume of 1/5-1/7 of the mixed solution, or adding 6-12M hydrochloric acid with the volume of 1/3-1/5 of the mixed solution and 0.2-0.4 wt % ammonium monoacid phosphate of all raw materials, or adding 9-18M sulfuric acid with the volume of 1/10-1/5 of the mixed solution, well mixing, transferring the mixed solution into the hydrothermal reactor, reacting at 150-180° C. for 8-25 hours, washing, drying and getting the precursor, heating the precursor at 480-500° C. for more than 5 hours and obtaining the product is provided.

Abstract: A process for preparing various morphology NTE compound ZrW0.5Mo1.5O8 comprising: preparing 0.4M Zr4+ solution, 0.2M W6+ solution and 0.6M Mo6+ solution with zirconyl nitrate, ammonium tungstate and ammo-nium molybdate separately, mixing them with the same volume and stirring until they are mixed well, adding 6-12M hydrochloric acid with the volume of ?- 1/7 of the mixed solution, or adding 6-12M hydrochloric acid with the volume of ?-? of the mixed solution and 0.2-0.4 wt % ammonium monoacid phosphate of all raw materials, or adding 9-18M sulfuric acid with the volume of 1/10-? of the mixed solution, well mixing, transferring the mixed solution into the hydrothermal reactor, reacting at 150-180° C. for 8-25 hours, washing, drying and getting the precursor, heating the precursor at 480-500° C. for more than 5 hours and obtaining the product is provided.