公开(公告)号：US20180264586A1

公开(公告)日：2018-09-20

申请号：US15918849

申请日：2018-03-12

Applicant: King Fahd University of Petroleum and Minerals

Inventor： Zafar IQBAL ,  Abdelrahman N. Shuaib ,  Necar Merah ,  Nouari SAHEB

IPC: B23K20/12 ,  B22F9/04 ,  C22C27/04

CPC classification number: B23K20/1255 ,  B22F9/04 ,  B22F9/14 ,  B22F2009/043 ,  B23K2103/04 ,  C22C27/04

Abstract: A friction stir welding tool comprising a composite of a tungsten-rhenium alloy and hafnium carbide particles, wherein a crystallite size of the tungsten-rhenium alloy is no more than 100 nm, wherein the hafnium carbide particles are dispersed within the tungsten-rhenium alloy, a method of fabricating the friction stir welding tool, and a method of friction stir welding a metal joint using the tool. Various embodiments of the friction stir welding tool, the method of fabricating the tool, and the method of friction stir welding using the tool are provided.

公开(公告)号：US20180318957A1

公开(公告)日：2018-11-08

申请号：US16038337

申请日：2018-07-18

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Zafar IQBAL ,  Abdelrahman N. SHUAIB ,  Necar MERAH ,  Nouari SAHEB

IPC: B23K20/12 ,  C22C27/04 ,  B22F9/14 ,  B22F9/04 ,  B23K103/04

CPC classification number: B23K20/1255 ,  B22F9/04 ,  B22F9/14 ,  B22F2009/043 ,  B23K2103/04 ,  C22C27/04

Abstract: A friction stir welding tool comprising a composite of a tungsten-rhenium alloy and hafnium carbide particles, wherein a crystallite size of the tungsten-rhenium alloy is no more than 100 nm, wherein the hafnium carbide particles are dispersed within the tungsten-rhenium alloy, a method of fabricating the friction stir welding tool, and a method of friction stir welding a metal joint using the tool. Various embodiments of the friction stir welding tool, the method of fabricating the tool, and the method of friction stir welding using the tool are provided.

公开(公告)号：US20150176106A1

公开(公告)日：2015-06-25

申请号：US14138177

申请日：2013-12-23

Applicant: KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

Inventor： Khwaja MOHAMMAD ,  Nouari SAHEB ,  Tahar LAOUI ,  Nasser AL-AQEELI

IPC: C22C29/02 ,  C22C1/05 ,  B22F3/105

CPC classification number: C22C1/051 ,  B22F3/105 ,  B22F2003/1051 ,  B22F2301/15 ,  B22F2302/10 ,  B22F2304/054 ,  C22C29/08

Abstract: The synthesis of high performance WC—Co cemented carbides which can be efficiently used in the cutting tool industry. WC with different particle sizes and different grain growth inhibitors were consolidated through spark plasma sintering technique and to form a cemented carbide with best combination of mechanical properties. VC and Cr3C2 are included as grain growth inhibitors in different amounts and combination to the WC—Co powder composition. Higher amount of inhibitors results in lower grain sizes and higher hardness values, however adding more than a crucial amount was observed to degrade the mechanical properties.

Abstract translation: 合成高性能WC-Co硬质合金，可有效地用于刀具行业。 通过放电等离子烧结技术固化不同粒径的WC和不同的晶粒生长抑制剂，并形成具有最佳机械性能组合的硬质合金。 VC和Cr3C2作为晶粒生长抑制剂以不同的量包含在WC-Co粉末组合物中。 更高量的抑制剂导致较低的晶粒尺寸和较高的硬度值，但是观察到加入超过关键量会降低机械性能。