# US 8,770,262 B2 · Stainless steel-and-amorphous alloy composite and method for manufacturing > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,770,262 B2 - Document ID: US8770262B2 - Status: Granted - Kind: B2 - Application number: 13/282,246 - Filed: 2011-10-26 - Published: 2013-02-14 - Granted: 2014-07-08 - Earliest claimed: 2011-08-11 - Assignees: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD.; Hon Hai Precision Industry Co., Ltd. - Applicants: Huann-Wu Chiang; Cheng-Shi Chen; Shun-Mao Lin - Inventors: Huann-Wu Chiang; Cheng-Shi Chen; Shun-Mao Lin - Web page: https://patentgrep.com/patent/US8770262B2 ## CPC - B32B 15/012: {one layer being formed of an iron alloy or steel, another layer being formed of aluminium or an aluminium alloy} - B22D 19/00: Casting in, on, or around objects which form part of the product (B22D23/04 takes precedence; alumino-thermic welding B23K23/00; coating by casting molten material on the substrate C23C6/00) - B22D 19/04: for joining parts - B32B 15/013: {one layer being formed of an iron alloy or steel, another layer being formed of a metal other than iron or aluminium} - C22C 1/11: Making amorphous alloys - C22C 38/00: Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00) - C22C 38/40: with nickel - C22C 45/001: {with Cu as the major constituent} - C22C 45/005: {with Mg as the major constituent} - C22C 45/10: with molybdenum, tungsten, niobium, tantalum, titanium, or zirconium {or Hf} as the major constituent - C25F 3/06: of iron or steel - Y10T 428/12479: Porous [e.g., foamed, spongy, cracked, etc.] - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B22D: CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES (shaping of plastics or substances in a plastic state B29C; metallurgical processing, selection of substances to be added to metal C21, C22) - C22C: ALLOYS (treatment of alloys C21D, C22F) - C25F: PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A stainless steel-and-amorphous alloy composite includes a stainless steel part and an amorphous alloy part. The stainless steel part has nano-pores defined in a surface thereof. The amorphous alloy part is integrally bonded to the surface having the nano-pores. A method for manufacturing the composite is also described. ## Claims ### Claim 1 A method for making a stainless steel-and-amorphous alloy composite, comprising: providing an stainless steel part; electrochemically etching the stainless steel part to form nano-pores on a surface thereof; pre-heating the stainless steel part; positioning the stainless steel part in a mold; and molding molten amorphous alloy on the surface having the nano-pores to form an amorphous alloy part integrally bonded to the stainless steel part when hardened, the molten amorphous alloy being at a temperature of about (Tg+5) ° C. to about (Tx-10) ° C., wherein the Tg and Tx are the onset temperature of glass transition and the onset temperature of crystallization of the amorphous alloy respectively. ### Claim 2 (depends on 1) The method as claimed in claim 1, wherein electrochemically etching the stainless steel part is carried out in a water solution containing about 4 wt %-7 wt % hydrochloric acid, about 10 wt %-12 wt % ferric chloride, and about 1.8 wt %-2.2 wt % ammonium chloride. ### Claim 3 (depends on 2) The method as claimed in claim 2, wherein during the electrochemically etching step, an electric current density about 2 A/dm2-2.5 A/dm2 is applied to the stainless steel part for about 8 min-14 min; the water solution maintains a temperature of about 40° C.-60° C. ### Claim 4 (depends on 1) The method as claimed in claim 1, wherein during the pre-heating step, the stainless steel part is heated to the onset temperature of glass transition of the amorphous alloy. ### Claim 5 (depends on 1) The method as claimed in claim 1, wherein during the molding step, inert gas is fed into the mold. ### Claim 6 (depends on 1) The method as claimed in claim 1, wherein during the molding step, the mold is at a temperature of about (Tg+5) ° C. to about (Tx-5) ° C. ### Claim 7 (depends on 1) The method as claimed in claim 1, further comprising a step of degreasing the stainless steel part before the electrochemically etching step. ### Claim 8 A method for making a stainless steel-and-amorphous alloy composite, comprising: providing a stainless steel part; electrochemically etching the stainless steel part to form nano-pores on a surface thereof, the nano-pores having an average diameter of about 30 nm-60 nm; pre-heating the stainless steel part; positioning the stainless steel part in a mold; and molding molten amorphous alloy on the surface having the nano-pores to form an amorphous alloy part integrally bonded to the stainless steel part when hardened, the molten amorphous alloy being at a temperature of about (Tg+5) ° C. to about (Tx-10) ° C., wherein the Tg and Tx are the onset temperature of glass transition and the onset temperature of crystallization of the amorphous alloy respectively, and the difference between the Tx and the Tg is larger than 20° C. ### Claim 9 (depends on 8) The method as claimed in claim 8, wherein electrochemically etching the stainless steel part is carried out in a water solution containing about 4 wt %-7 wt % hydrochloric acid, about 10 wt %-12 wt % ferric chloride, and about 1.8 wt %-2.2 wt % ammonium chloride. ### Claim 10 (depends on 9) The method as claimed in claim 9, wherein during the electrochemically etching step, an electric current density about 2 A/dm2-2.5 A/dm2 is applied to the stainless steel part for about 8 min-14 min; the water solution maintains a temperature of about 40° C.-60° C. ### Claim 11 (depends on 8) The method as claimed in claim 8, wherein during the pre-heating step, the stainless steel part is heated to the onset temperature of glass transition of the amorphous alloy. ### Claim 12 (depends on 8) The method as claimed in claim 8, wherein during the molding step, inert gas is fed into the mold. ### Claim 13 (depends on 8) The method as claimed in claim 8, wherein during the molding step, the mold is at a temperature of about (Tg+5) ° C. to about (Tx-5) ° C.