Provided herein is a method of hot gas forming and heat treatment for a Ti.sub.2AlNb-based alloy hollow thin-walled component, which pertains to the technical field of plastic forming manufacture of thin-walled components made from difficult-to-deformation materials, more particularly, a forming method of Ti.sub.2AlNb-based alloy hollow thin-walled components is involved. The purpose of this invention is to solve the existing problems that Ti.sub.2AlNb-based alloy hollow thin-walled components are difficult to form, process steps are complex, and the shape and dimension precision is in contradiction with the control of the microstructure and properties. The method comprises the following steps: (1) hot gas forming to obtain hot gas formed tube components, and (2) controllalbe-cooling heat treatment to obtain Ti.sub.2AlNb-based alloy hollow thin-walled components. The advantages of this invention are as following: improving production efficiency, high dimensional accuracy, reducing energy consumption, achieveing the integration of shape and performance control, and excellent mechanical properties. The invention also relates to Ti.sub.2AlNb-based alloy hollow thin-walled components manufactured by a hot gas forming and heat treatment method.

The invention relates to a wire electrode (10) for the spark-erosive cutting of articles, comprising and electrically conductive core (2) and a jacket (5) surrounding the core (2), which jacket comprises at least on +-cover layer (6) that contains -brass and/or -brass. In order to provide a wire electrode that has improved cutting efficiency, according to the invention, the +-cover layer (6) forms a homogenous phase (7) of -brass and/or -brass in +-brass grains (8) having an +-phase and/or a +-phase are embedded.

The invention relates to a wire electrode (10) for the spark-erosive cutting of articles, comprising and electrically conductive core (2) and a jacket (5) surrounding the core (2), which jacket comprises at least on +-cover layer (6) that contains -brass and/or -brass. In order to provide a wire electrode that has improved cutting efficiency, according to the invention, the +-cover layer (6) forms a homogenous phase (7) of -brass and/or -brass in +-brass grains (8) having an +-phase and/or a +-phase are embedded.

A high creep-resistant equiaxed grain nickel-based superalloy. The high creep-resistant equiaxed grain nickel-based superalloy is characterized that the chemical compositions in weight ratios include Cr in 8.0 to 9.5 wt %, W in 9.5 to 10.5 wt %, Co in 9.5 to 10.5 wt %, Al in 5.0 to 6.0 wt %, Ti in 0.5 to 1.5 wt %, Mo in 0.5 to 1.0 wt %, Ta in 2.5 to 4.0 wt %, Hf in 1.0 to 2.0 wt %, Ir in 2.0 to 4.0 wt %, C in 0.1 to 0.2 wt %, B in 0.01 to 0.1 wt %, Zr in 0.01 to 0.10 wt %, and the remaining part formed by Ni and inevitable impurities.

A high creep-resistant equiaxed grain nickel-based superalloy. The high creep-resistant equiaxed grain nickel-based superalloy is characterized that the chemical compositions in weight ratios include Cr in 8.0 to 9.5 wt %, W in 9.5 to 10.5 wt %, Co in 9.5 to 10.5 wt %, Al in 5.0 to 6.0 wt %, Ti in 0.5 to 1.5 wt %, Mo in 0.5 to 1.0 wt %, Ta in 2.5 to 4.0 wt %, Hf in 1.0 to 2.0 wt %, Ir in 2.0 to 4.0 wt %, C in 0.1 to 0.2 wt %, B in 0.01 to 0.1 wt %, Zr in 0.01 to 0.10 wt %, and the remaining part formed by Ni and inevitable impurities.

An MMXY metal composite functional material and a preparation method thereof; an MMXY metal composite functional material, comprising the following components in percentage by volume: A% of M.sub.aM.sub.bX.sub.c and B% of Y, wherein each of M and M is any one element of a transition group or an alloy of more than one element, X is any one element of IIIA group or IVA group or an alloy of more than one element, and Y is any one element of IB group, IIB group, IIA group or IVA group, or an alloy of more than one element, wherein the value range of a, b and c is 0.8-1.2, and the sum of A% and B% is 100%; the material is prepared through smelting, annealing, crushing, mixing, pressing and curing, etc.; the mechanical performance of the MMXY metal composite functional material prepared according to the present invention is far higher than the traditional MMX material; the prepared MMXY metal composite functional material has an ideal magnetothermal effect, thus can be used as a magnetic refrigeration material; the method can prepare MMXY metal composite functional materials with any size and shape according to actual requirements; the method is simple, and can be easily operated and realized.

An MMXY metal composite functional material and a preparation method thereof; an MMXY metal composite functional material, comprising the following components in percentage by volume: A% of M.sub.aM.sub.bX.sub.c and B% of Y, wherein each of M and M is any one element of a transition group or an alloy of more than one element, X is any one element of IIIA group or IVA group or an alloy of more than one element, and Y is any one element of IB group, IIB group, IIA group or IVA group, or an alloy of more than one element, wherein the value range of a, b and c is 0.8-1.2, and the sum of A% and B% is 100%; the material is prepared through smelting, annealing, crushing, mixing, pressing and curing, etc.; the mechanical performance of the MMXY metal composite functional material prepared according to the present invention is far higher than the traditional MMX material; the prepared MMXY metal composite functional material has an ideal magnetothermal effect, thus can be used as a magnetic refrigeration material; the method can prepare MMXY metal composite functional materials with any size and shape according to actual requirements; the method is simple, and can be easily operated and realized.

A multiple-element composite material for negative electrodes, a preparation method therefor, and a lithium-ion battery using the negative electrode material. The lithium-ion battery uses multiple-element composite material for negative electrodes has a core-shell structure containing multiple shell layers. The inner core consists of graphite and nano-active matter coating the surface of the graphite. The outer layers of the inner core are in order: the first shell layer is of an electrically conductive carbon material, the second shell layer is of a nano-active matter, and the third shell layer is an electrically conductive carbon material coating layer. The multiple-element composite material for negative electrodes of the present invention combines coating processing technology with surface composite modification and coating modification technology to successfully prepare a multiple-element composite material for negative electrodes having a core-shell structure containing multiple shell layers, and allows for high load and high dispersion for the nano-active matter, thereby substantially enhancing the material specific capacity, cycle performance, and initial efficiency. Additionally, the multiple-element composite material for negative electrodes of the present invention has high compacted density and good processing performance. The negative electrode material has simple preparation technique and low raw material cost, is environmentally friendly, and causes no pollution.

A multiple-element composite material for negative electrodes, a preparation method therefor, and a lithium-ion battery using the negative electrode material. The lithium-ion battery uses multiple-element composite material for negative electrodes has a core-shell structure containing multiple shell layers. The inner core consists of graphite and nano-active matter coating the surface of the graphite. The outer layers of the inner core are in order: the first shell layer is of an electrically conductive carbon material, the second shell layer is of a nano-active matter, and the third shell layer is an electrically conductive carbon material coating layer. The multiple-element composite material for negative electrodes of the present invention combines coating processing technology with surface composite modification and coating modification technology to successfully prepare a multiple-element composite material for negative electrodes having a core-shell structure containing multiple shell layers, and allows for high load and high dispersion for the nano-active matter, thereby substantially enhancing the material specific capacity, cycle performance, and initial efficiency. Additionally, the multiple-element composite material for negative electrodes of the present invention has high compacted density and good processing performance. The negative electrode material has simple preparation technique and low raw material cost, is environmentally friendly, and causes no pollution.

The invention relates to a substantially equiatomic FeCo-alloy cold-rolled strip or sheet, and to a magnetic part cut from same, as well as to a method for fabricating a FeCo-alloy cold-rolled strip or sheet. A fully recrystallized hot-rolled sheet or strip is prepared, with a thickness of 1.5-2.5 mm and the following composition: 47.0%Co51.0%; tracesV+W3.0%; tracesTa+Zr0.5%; tracesNb0.5%; tracesB0.05%; tracesSi3.0%; tracesCr3.0%; tracesNi5.0%; tracesMn2.0%; tracesO0.03%; tracesN0.03%; tracesS0.005%; tracesP0.015; tracesMo0.3%; tracesCu0.5%; tracesAl0.01%; tracesTi0.01%; tracesCa+Mg0.05%; tracesrare earths500 ppm; the remainder being iron and impurities. A first cold-rolling step is carried out with a reduction rate of 70 to 90%, to bring the strip or sheet to a thickness of 1 mm. Intermediate annealing is carried out when running, leading to a partial recrystallization of the strip or sheet, running at a speed (V), and where its temperature, in the useful zone of the furnace of useful length (Lu), is between Trc and 900 C., the strip or sheet remaining therein for 15 s to 5 min at a temperature (T) such that 26 C..Math.minTTrc).Math.Lu/V160 C. min. The strip or sheet is cooled to at least 600 C./hour. A second step of cold-rolling the annealed strip or sheet is carried out, with a reduction rate of 60 to 80%, to bring the strip or sheet to a thickness of 0.05 to 0.25 mm. And final annealing (Rf) of the cold-rolled strip or sheet is carried out to achieve complete recrystallization followed by cooling at 100 to 500 C./hour.

Magnetic part, such as a magnetic core, obtained from a strip or sheet manufactured by this method.